Gender and ethnic/racial diversity in clinical neuropsychology: Updates from the AACN, NAN, SCN 2020 practice and "salary survey".

OBJECTIVE: Examination of gender and diversity issues within clinical neuropsychology, using data from the 2020 professional practice and "salary survey." METHODS: Clinical neuropsychologists in the U.S. and Canada were invited to participate in an online survey. The final sample consisted of 1677 doctoral-level practitioners. RESULTS: Approximately, 60% of responding neuropsychologists are women and 53.8% of those women identify as early career psychologists (ECPs). Conversely, a majority of men in the sample are advanced career psychologists (ACPs). Both genders work predominantly in institutions, but more men than women work in private practice. ACP men produce a greater number of peer-reviewed publications and conference presentations. Across all work settings, women earn significantly less than men, and are less satisfied with their incomes. Establishing and maintaining family life is the biggest obstacle to attaining greater income and job satisfaction for both genders. Ethnic/racial minority status was identified in 12.9% of respondents, with 59.2% being ECPs. Job satisfaction and hostility in the workplace vary across ethnic/racial minority groups. Hispanic/Latino(a) and White neuropsychologists report higher incomes, but there were no statistically significant differences between any of the groups. CONCLUSIONS: Income and select practice differences persist between female and male neuropsychologists. There is a slow rate of increased ethnic/racial diversity over time, which is much more apparent among early career practitioners. Trajectories and demographics suggest that the gender income gap is unlikely to be improved by the next survey iteration in 2025, whereas it is very likely that ethnic/racial diversity will continue to increase gradually.

Forensic neuropsychology: History and current status.

Objective:This review provides a summary of historical details and current practice activities related to Forensic Neuropsychology (FN). Under the auspices of the American Board of Clinical Neuropsychology (ABCN), the Forensic Neuropsychology Special Interest Group (FNSIG) views the FN as a subspecialty, which has developed over time as the straightforward result of more than 20 years of numerous publications, extensive continuing education, focused research and growth of forensic practice within neuropsychology. In this article, the FNSIG core work group documents and integrates information that is the basis of efforts to consolidate practice knowledge and facilitate attainment of forensic practice competencies by clinical neuropsychologists. Method:Overview of continuing education topics at professional conferences, search results that identify relevant books and peer-reviewed publications, as well as pertinent findings across years of large-scale national survey results. Results:Relevant evidence has shown for decades that FN is prominent within Clinical Neuropsychology as practiced in the United States and Canada. A majority of U.S. neuropsychologists have received FN training and provide forensic evaluation services. FN practice time per week is considerable for many practitioners, and across survey epochs has been shown to be increasing. Conclusion:The present review leads to the conclusion that in the interest of promoting the acquisition of competence, FN practice should remain a focal point of training and continuing education. Alternate routes to attain competence are discussed, as are ongoing professional activities that undoubtedly will ensure continued growth of, and interest in, the subspecialty of FN.

The role of posttraumatic stress symptoms on memory complaints and performance in active-duty service members.

OBJECTIVE: Memory complaints are the most common form of cognitive limitation reported by military service members, but prior research suggests that posttraumatic stress symptoms (PTSS) may account for the link between subjective cognitive complaints and objective cognitive performance. The mechanisms underlying this relationship are largely unknown, including whether the finding applies to memory complaints and performance, which clinical dimensions are involved, and how the association varies when memory complaints are non-credible. METHOD: Using a sample of 196 US military service members, the present study aims to address these gaps by modeling the relationship between objective memory performance and plausible/implausible subjective memory complaints, then evaluating how the association is influenced by PTSS and clinical traits commonly found within PTSS (e.g. depression, anxiety, and somatic concerns). RESULTS: Overall memory complaints were associated with immediate and delayed recall, but both associations were fully mediated by PTSS (95% CI -0.14, -0.01; 95% CI -0.14, -0.02, respectively). Implausible memory complaints, however, were inconsistently linked to memory performance, and no PTSS mediation was observed. Of the clinical traits, only depression moderated the impact of PTSS, specifically by influencing the link between PTSS and overall memory complaints (ß = -0.02, SE = 0.004, p < .001). CONCLUSIONS: These results corroborate the importance of assessment for PTSS and depression in service members who report subjective memory complaints and highlight how targeted intervention for these conditions may play a key role in the management of memory complaints.

Inefficient Attentional Control Explains Verbal-Memory Deficits Among Military Veterans With Posttraumatic Reexperiencing Symptoms.

Among individuals with posttraumatic stress disorder (PTSD), verbal learning and memory are areas of weakness compared with other cognitive domains (e.g., visuospatial memory). In this study, previously deployed military veterans completed clinical assessments of word memory and vocabulary (n = 243) and a laboratory task measuring encoding, free recall, repetition priming, and recognition of words (n = 147). Impaired verbal memory was selectively related to reexperiencing symptoms of PTSD but was not associated with other symptom groupings or blast-induced traumatic brain injury. Implicit priming of response times following word repetition was also unrelated to clinical symptoms. Instead, slowed response times during encoding explained associations between reexperiencing and memory performance. These findings are consistent with alterations in attentional control explaining PTSD-related verbal-memory deficits. Such findings have implications for understanding trauma-focused psychotherapy and recovery, which may depend on efficient attentional processing of words to alter posttraumatic reexperiencing symptoms.

Plasma Neurofilament Light and Future Declines in Cognition and Function in Alzheimer's Disease in the FIT-AD Trial.

BACKGROUND: Utilities of blood-based biomarkers in Alzheimer's disease (AD) clinical trials remain unknown. OBJECTIVE: To evaluate the ability of plasma neurofilament light chain (NfL) to predict future declines in cognition and activities of daily living (ADL) outcomes in 26 older adults with mild-to-moderate AD dementia from the FIT-AD Trial. METHODS: Plasma NfL was measured at baseline and 3 and 6 months. Cognition and ADL were assessed using the AD Assessment Scale-Cognition (ADAS-Cog) and AD Uniform Dataset Instruments and Disability Assessment for Dementia (DAD), respectively, at baseline, 3, 6, 9, and 12 months. Linear mixed effects models were used to examine the associations between baseline or change in plasma NfL and changes in outcomes. RESULTS: Higher baseline plasma NfL was associated with greater rate of decline in ADAS-Cog from baseline to 6 months (standardized estimate of 0.00462, p = 0.02853) and in ADL from baseline to 12 months (standardized estimate of -0.00284, p = 0.03338). Greater increase in plasma NfL in short term from baseline to 3 months was associated with greater rate of decline in memory and ADL from 3 to 6 months (standardized estimate of -0.04638 [0.003], p = 0.01635; standardized estimate of -0.03818, p = 0.0435) and greater rate of decline in ADL from 3 to 12 month (standardized estimate of -0.01492, p = 0.01082). CONCLUSION: This study demonstrated that plasma NfL might have the potential to predict cognitive and function decline up to 12 months. However, future studies with bigger sample sizes need to confirm the findings.

Clinical neuropsychology in Canada: Results from the 2020 AACN, NAN, SCN professional practice and "salary survey".

Objective: The current study summarizes the results of a 2020 survey that solicited information regarding backgrounds, beliefs, practices, and incomes of clinical neuropsychologists who practice in Canada. Methods: Clinical neuropsychologists who practice in Canada were invited to participate in an online survey that was available from 1/17/20 to 4/02/20. Available survey findings were obtained from 111 respondents, which reflects a response rate of 51.3% of the 216 doctoral-level Canadian neuropsychologists identified in at least one major North American or international professional organization membership list (AACN, INS, NAN, or SCN). Results: Most of the current respondents were White/Caucasian women who identified as adult providers and worked full-time in urban institutional settings. Four Canadian provinces (Alberta, British Columbia, Ontario, Quebec) accounted for more than 91% of the current respondent sample. Incomes and career satisfactions were largely encouraging, though some important variations were noted by province, work setting, and professional identity. Incomes were significantly associated with forensic practices and years of clinical experience. Most respondents made use of technician support in their practices, largely to increase productivity and patient volume. Only a small minority of respondents were board-certified and there was generally limited interest in future board certification. Conclusions: While important similarities were observed in the current Canadian sample relative to recent survey findings obtained in a U.S. sample, results also reveal a number of important differences that serve as important areas of future consideration.

Cognitive Effects of Aerobic Exercise in Alzheimer's Disease: A Pilot Randomized Controlled Trial.

BACKGROUND: Aerobic exercise has shown inconsistent cognitive effects in older adults with Alzheimer's disease (AD) dementia. OBJECTIVE: To examine the immediate and longitudinal effects of 6-month cycling on cognition in older adults with AD dementia. METHODS: This randomized controlled trial randomized 96 participants (64 to cycling and 32 to stretching for six months) and followed them for another six months. The intervention was supervised, moderate-intensity cycling for 20-50 minutes, 3 times a week for six months. The control was light-intensity stretching. Cognition was assessed at baseline, 3, 6, 9, and 12 months using the AD Assessment Scale-Cognition (ADAS-Cog). Discrete cognitive domains were measured using the AD Uniform Data Set battery. RESULTS: The participants were 77.4±6.8 years old with 15.6±2.9 years of education, and 55% were male. The 6-month change in ADAS-Cog was 1.0±4.6 (cycling) and 0.1±4.1 (stretching), which were both significantly less than the natural 3.2±6.3-point increase observed naturally with disease progression. The 12-month change was 2.4±5.2 (cycling) and 2.2±5.7 (control). ADAS-Cog did not differ between groups at 6 (p = 0.386) and 12 months (p = 0.856). There were no differences in the 12-month rate of change in ADAS-Cog (0.192 versus 0.197, p = 0.967), memory (-0.012 versus -0.019, p = 0.373), executive function (-0.020 versus -0.012, p = 0.383), attention (-0.035 versus -0.033, p = 0.908), or language (-0.028 versus -0.026, p = 0.756). CONCLUSION: Exercise may reduce decline in global cognition in older adults with mild-to-moderate AD dementia. Aerobic exercise did not show superior cognitive effects to stretching in our pilot trial, possibly due to the lack of power.

Professional practices, beliefs, and incomes of U.S. neuropsychologists: The AACN, NAN, SCN 2020 practice and "salary survey".

OBJECTIVE: This portion of the 2020 survey updates practice information, beliefs, and income data of clinical neuropsychologists who practice within the United States. Methods: Doctoral-level neuropsychology practitioners were invited via numerous methods, with multiple reminders, to participate in a web-based survey from January 17 through April 2, 2020. The useable U.S. sample of 1677 doctoral-level practitioners was 6.2% larger than the comparable group in the prior 2015 practice survey. Results: Whereas women practitioners predominate, which continues a steeply increasing trend across time, increases in overall ethnic/racial diversity continue at a slow pace. Median age has remained very similar over the last 30 years, reflecting a continuous influx of young practitioners. A relatively small minority of neuropsychologists work part time. The proportion of board-certified neuropsychologists continues to show meaningful increase; interest in subspecialization certification is relatively high. Reliance on technicians remains popular, especially for neuropsychologists who work in institutions or are board certified. Although implementation of new CPT codes in 2019 and related payor policies appear to have had more negative than positive effects, psychology-related annual incomes of neuropsychologists have again increased compared to prior surveys. Variables such as specific work setting, state, region, years in practice, forensic practice hours, board certification, and basis for determining income (e.g. hours billed, revenue collected, relative value units) have an impact on income. More than half of practitioners engage in forensic neuropsychology, with the number of related practice hours per week again increasing. There is very high agreement regarding the use of response validity measures in clinical practice and forensic practice. Neurologists remain the number one referral source whether working in an institution, private practice, or a combination of both, and regardless of maintaining a pediatric, adult, or lifespan practice. Career satisfaction ratings for income, job, and work-life balance remain high, with the majority of ratings regarding the future of the specialty in the positive range. Additional data summaries related to a wide range of professional and practice topics are provided. Conclusions: Updating and comparing survey information at five-year intervals continues to provide insights and perspectives regarding relative stabilities and changes in practice activities, beliefs, and incomes of U.S. clinical neuropsychologists. Such information also provides guidance regarding the future of the specialty.

Professional Practices, Beliefs, and Incomes of Postdoctoral Trainees: The AACN, NAN, SCN 2020 Practice and 'Salary Survey'.

OBJECTIVE: Within a portion of the 2020 professional practice and "salary survey," to update key information regarding neuropsychology postdoctoral trainees. METHODS: Postdoctoral trainees were contacted via a variety of membership listings, including the listserv used by the program directors of the Association of Postdoctoral Programs in Clinical Neuropsychology (APPCN). Invitations sent in multiple waves to members of numerous neuropsychological organizations via e-messages and physical postcards included the request that postdoctoral trainees participate. The survey website was opened on January 17, 2020 and closed on April 2, 2020, during which time a total of 178 postdoctoral trainees in the USA and 3 in Canada participated. RESULTS: Response rate was estimated to be 56.4%, which adequately represents the target sample. The modal postdoctoral trainee is a woman whose internship was American Psychological Association (APA)-accredited and whose postdoctoral training is in an APPCN program that adheres to Houston Conference training guidelines. Extensive clinical experiences in neuropsychology in the form of externship practica and during internship were reported by the majority of trainees prior to postdoctoral training. There are few differences between APPCN and non-APPCN trainees and reported training experiences. Job satisfaction is high. Salaries appear to have increased substantially in recent years. There is universal interest in pursuing board certification. Support for the empirical foundations justifying assessment of response validity is high. CONCLUSIONS: Surveys of postdoctoral trainees continue to provide valuable perspectives regarding training background, clinical experiences, practice beliefs, and incomes of individuals who will soon launch their careers in clinical neuropsychology.

Blast concussion and posttraumatic stress as predictors of postcombat neuropsychological functioning in OEF/OIF/OND veterans.

OBJECTIVES: Many combat veterans exhibit cognitive limitations of uncertain origin. In this study, we examined factors that predict cognitive functioning by considering effects of blast-related concussion (BRC), non-blast-related concussion (NBRC), and posttraumatic stress disorder (PTSD) symptoms. Analyses specifically tested whether (a) BRC and NBRC were distinct in their prediction of cognitive performance; (b) a dose-response relationship existed between recurrent concussion (BRC and NBRC) and cognitive impairment; and (c) PTSD symptoms mediated the relationship between BRC and cognitive performance. METHOD: Two hundred eighty veterans with combat zone deployment histories completed semistructured clinical interviews to define BRC and NBRC histories, current and past mental health disorders, and dimensional ratings of PTSD symptomatology. Participants were also administered a number of neuropsychological measures to appraise cognitive functioning. RESULTS: A structural equation model (SEM) suggested that BRC and NBRC were not distinct in their prediction of cognitive performance, and there was no evidence that recurrent concussion (blast or nonblast) was directly associated with cognitive performance. BRC was significantly associated with PTSD symptoms (r = .24), PTSD symptoms were significantly associated with cognitive performance in the SEM (r = -.27), and PTSD symptoms significantly mediated the link between BRC and cognitive performance (p = .03). CONCLUSIONS: These results suggest that concussion history fails to directly contribute to cognitive performance, regardless of mechanism (blast or nonblast) and recurrence. BRC is nonetheless unique in its contribution to PTSD and PTSD-related cognitive deficits. Results support interventions specific to PTSD management in the interest of promoting neuropsychological functioning among war veterans. (PsycINFO Database Record (c) 2020 APA, all rights reserved).

The impact of PTSD and mTBI on the relationship between subjective and objective cognitive deficits in combat-exposed veterans.

OBJECTIVE: Cognitive complaints, such as attentional or memory concerns, are commonly reported by veterans diagnosed with posttraumatic stress disorder (PTSD) or a history of mild traumatic brain injury (mTBI). The degree to which those complaints actually map onto measurable cognitive deficits is unclear and is likely complicated by the severity of trauma-related sequelae. In the present study we sought to characterize the degree to which PTSD symptoms and mTBI accounted for the relationship of subjective cognitive complaints to objective cognitive performance, with the goal of facilitating the accurate assessment of trauma-exposed veterans complaining of cognitive decline. METHOD: A sample of 203 U.S. military veterans previously deployed to Iraq and/or Afghanistan were assessed for PTSD severity, history of blast and impact mTBI, objective cognitive function, and subjective cognitive complaints. Separate mediation analyses were conducted to explore the degree that PTSD severity, blast mTBI severity, and impact mTBI severity influenced the association between subjective cognitive complaints and objective cognitive performance. Models reflecting significant mediation were followed by post hoc moderated mediation analyses. RESULTS: Subjective cognitive complaints and objective cognitive performance were significantly associated (ß = -6.49, SE = 2.85, p = .03), but this relationship was mediated by PTSD severity (ß= -2.95, SE = 2.86, p = .30). PTSD mediation was not moderated by either blast or impact mTBI. CONCLUSION: The present results delineate the prominent impact of PTSD symptoms, relative to blast and impact mTBI, on cognition following combat. These findings highlight the importance of assessing for trauma-related psychopathology in those seeking neuropsychological assessment or rehabilitative care for cognitive complaints. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Efficacy and mechanisms of combined aerobic exercise and cognitive training in mild cognitive impairment: study protocol of the ACT trial.

BACKGROUND: Developing non-pharmacological interventions with strong potential to prevent or delay the onset of Alzheimer's disease (AD) in high-risk populations is critical. Aerobic exercise and cognitive training are two promising interventions. Aerobic exercise increases aerobic fitness, which in turn improves brain structure and function, while cognitive training improves selective brain function intensively. Hence, combined aerobic exercise and cognitive training may have a synergistic effect on cognition by complementary strengthening of different neural functions. Few studies have tested the effects of such a combined intervention, and the findings have been discrepant, largely due to varying doses and formats of the interventions. METHODS/DESIGN: The purpose of this single-blinded, 2 × 2 factorial phase II randomized controlled trial is to test the efficacy and synergistic effects of a 6-month combined cycling and speed of processing training intervention on cognition and relevant mechanisms (aerobic fitness, cortical thickness, and functional connectivity in the default mode network) in older adults with amnestic mild cognitive impairment. This trial will randomize 128 participants equally to four arms: cycling and speed of processing, cycling only, speed of processing only, or attention control for 6 months, and then follow them for another 12 months. Cognition and aerobic fitness will be assessed at baseline and at 3, 6, 12, and 18 months; cortical thickness and functional connectivity at baseline and at 6, 12, and 18 months; Alzheimer's disease (AD) conversion at 6, 12, and 18 months. The specific aims are to (1) determine the efficacy and synergistic effects of the combined intervention on cognition over 6 months, (2) examine the underlying mechanisms of the combined intervention, and (3) calculate the long-term effect sizes of the combined intervention on cognition and AD conversion. The analysis will use intention-to-treat and linear mixed-effects modeling. DISCUSSION: This trial will be among the first to test the synergistic effects on cognition and mechanisms (relevant to Alzheimer's-associated neurodegeneration) of a uniquely conceptualized and rigorously designed aerobic exercise and cognitive training intervention in older adults with mild cognitive impairment. It will advance Alzheimer's prevention research by providing precise effect-size estimates of the combined intervention. TRIAL REGISTRATION: ClinicalTrials.gov, NCT03313895 . Registered on 18 October 2017.

Predictors of Postdeployment Functioning in Combat-Exposed U.S. Military Veterans.

Posttraumatic stress disorder (PTSD) and sequelae of mild traumatic brain injury (mTBI) are presumed to contribute to reintegration difficulties in combat-exposed veterans. Yet their relative impacts on postdeployment functioning are not well understood. The current study used structural equation modeling (SEM) to clarify the extent to which symptoms of internalizing disorders (e.g., depression, anxiety), mTBI symptoms, and cognitive performance are associated with functional impairment in 295 combat-exposed veterans. SEM results showed that internalizing symptoms most significantly predicted functional impairment (r = 0.72). Blast mTBI and cognitive performance were associated with internalizing (r = 0.24 and -0.25, respectively), but functional impairment was only modestly related to cognition (r = -0.17) and unrelated to mTBI. These results indicate that internalizing symptoms are the strongest predictor of functioning in trauma-exposed veterans, exceeding the effects of mTBI and cognitive performance. This evidence supports prioritizing interventions that target internalizing psychopathology to improve functioning in cases of co-occurring PTSD and mTBI.

PTSD confounds detection of compromised cerebral white matter integrity in military veterans reporting a history of mild traumatic brain injury.

PRIMARY OBJECTIVE: Based on high comorbidity between mild traumatic brain injury (mTBI) and post-traumatic stress disorder (PTSD) among deployed military service members, this study tested the hypothesis that the presence of PTSD disrupts the association between mTBI and lower white matter integrity identified in non-military samples. Research design/Methods and procedures: In a sample of 124 recent veterans with a range of mTBI and PTSD history, diffusion tensor imaging (DTI) metrics of white matter integrity in 20 regions were compared using multiple mTBI and PTSD contrasts. MAIN OUTCOMES AND RESULTS: Civilian mTBI was associated with lower global anisotropy, higher global diffusivity and higher diffusivity in 17 of 20 regions. No main effects of deployment mTBI were observed, but an interaction between deployment mTBI and lifetime PTSD on FA was observed globally and in 10 regions. Impact and blast mTBI demonstrated similar but weaker effects to those of civilian and deployment mTBI, respectively, demonstrating the context of mTBI is more relevant to white matter integrity than mechanism of injury. CONCLUSIONS: Overall, a main effect of civilian mTBI indicates long-term disruptions to white matter are likely present, while the interaction between deployment mTBI and PTSD indicates that a history of PTSD alters this relationship.

Deficits in Visual System Functional Connectivity after Blast-Related Mild TBI are Associated with Injury Severity and Executive Dysfunction.

INTRODUCTION: Approximately, 275,000 American service members deployed to Iraq or Afghanistan have sustained a mild traumatic brain injury (mTBI), with 75% of these incidents involving an explosive blast. Visual processing problems and cognitive dysfunction are common complaints following blast-related mTBI. METHODS: In 127 veterans, we examined resting fMRI functional connectivity (FC) of four key nodes within the visual system: lateral geniculate nucleus (LGN), primary visual cortex (V1), lateral occipital gyrus (LO), and fusiform gyrus (FG). Regression analyses were performed (i) to obtain correlations between time-series from each seed and all voxels in the brain, and (ii) to identify brain regions in which FC variability was related to blast mTBI severity. Blast-related mTBI severity was quantified as the sum of the severity scores assigned to each of the three most significant blast-related injuries self-reported by subjects. Correlations between FC and performance on executive functioning tasks were performed across participants with available behavioral data (n = 94). RESULTS: Greater blast mTBI severity scores were associated with lower FC between: (A) LGN seed and (i) medial frontal gyrus, (ii) lingual gyrus, and (iii) right ventral anterior nucleus of thalamus; (B) V1 seed and precuneus; (C) LO seed and middle and superior frontal gyri; (D) FG seed and (i) superior and medial frontal gyrus, and (ii) left middle frontal gyrus. Finally, lower FC between visual network regions and frontal cortical regions predicted worse performance on the WAIS digit-symbol coding task. CONCLUSION: These are the first published results that directly illustrate the relationship between blast-related mTBI severity, visual pathway neural networks, and executive dysfunction - results that highlight the detrimental relationship between blast-related brain injury and the integration of visual sensory input and executive processes.

The impact of failing to identify suspect effort in patients undergoing adult attention-deficit/hyperactivity disorder (ADHD) assessment.

[Correction Notice: An Erratum for this article was reported in Vol 28(10) of Psychological Assessment (see record 2016-22725-001). In the article, the penultimate sentence of the abstract should read "These results suggest that a significant percentage of those making a suspect effort will be diagnosed with ADHD using the most commonly employed assessment methods: an interview alone (71%); an interview and ADHD behavior rating scales combined (65%); and an interview, behavior rating scales, and most continuous performance tests combined (62%)." All versions of this article have been corrected.] This retrospective study examines how many adult patients would plausibly receive a diagnosis of attention-deficit/hyperactivity disorder (ADHD) if performance and symptom validity measures were not administered during neuropsychological evaluations. Five hundred fifty-four patients were extracted from an archival clinical dataset. A total of 102 were diagnosed with ADHD based on cognitive testing, behavior rating scales, effort testing, and clinical interview; 115 were identified as putting forth suspect effort in accordance with the Slick, Sherman, and Iverson (1999) criteria. From a clinical decision-making perspective, suspect effort and ADHD groups were nearly indistinguishable on ADHD behavior, executive function, and functional impairment rating scales, as well as on cognitive testing and key clinical interview questions. These results suggest that a significant percentage of those making a suspect effort will be diagnosed with ADHD using the most commonly employed assessment methods: an interview alone (71%); an interview and ADHD behavior rating scales combined (65%); and an interview, behavior rating scales, and most continuous performance tests combined (62%) [corrected]. This research makes clear that it is essential to evaluate task engagement and possible symptom amplification during clinical evaluations.

Factors associated with inconsistency in self-reported mild traumatic brain injury over time among military personnel in Iraq.

BACKGROUND: Estimates of the prevalence of mild traumatic brain injury (mTBI) among military personnel and combat veterans rely almost exclusively on retrospective self-reports; however, reliability of these reports has received little attention. AIMS: To examine the consistency of reporting of mTBI over time and identify factors associated with inconsistent reporting. METHOD: A longitudinal cohort of 948 US National Guard Soldiers deployed to Iraq completed self-report questionnaire screening for mTBI and psychological symptoms while in-theatre 1 month before returning home (time 1, T1) and 1 year later (time 2, T2). RESULTS: Most respondents (n = 811, 85.5%) were consistent in their reporting of mTBI across time. Among those who were inconsistent in their reports (n = 137, 14.5%), the majority denied mTBI at T1 and affirmed mTBI at T2 (n = 123, 89.8%). Respondents rarely endorsed mTBI in-theatre and later denied mTBI (n = 14, 10.2% of those with inconsistent reports). Post-deployment post-traumatic stress symptoms and non-specific physical complaints were significantly associated with inconsistent report of mTBI. CONCLUSIONS: Military service members' self-reports of mTBI are generally consistent over time; however, inconsistency in retrospective self-reporting of mTBI status is associated with current post-traumatic stress symptoms and non-specific physical health complaints.

The American Academy of Clinical Neuropsychology, National Academy of Neuropsychology, and Society for Clinical Neuropsychology (APA Division 40) 2015 TCN Professional Practice and 'Salary Survey': Professional Practices, Beliefs, and Incomes of U.S. Neuropsychologists.

OBJECTIVE: The current survey updated professional practice and income information pertaining to clinical neuropsychology. METHODS: Doctoral-level members of the American Academy of Clinical Neuropsychology, Division 40 (Clinical Neuropsychology) of the American Psychological Association, and the National Academy of Neuropsychology and other neuropsychologists, as well as postdoctoral trainees in the Association of Postdoctoral Programs in Clinical Neuropsychology and at other training sites were invited to participate in a web-based survey in early 2015. The sample of 1777 respondents, of whom 1579 were doctoral-level practitioners and 198 were postdoctoral trainees, was larger than the prior 2010 income and practice survey. RESULTS: The substantial proportional change in gender has continued, with women now a clear majority in the postdoctoral trainee sample as well as in the practitioner sample. Dissimilar from the median age trajectory of American Psychological Association members, the median age of clinical neuropsychologists remains essentially unchanged since 1989, indicating a substantial annual influx of young neuropsychologists. The question of whether the Houston Conference training model has become an important influence in the specialty can now be considered settled in the affirmative among postdoctoral trainees and practitioners. Testing assistant usage remains commonplace, and continues to be more common in institutions. The vast majority of clinical neuropsychologists work full-time and very few are unemployed and seeking employment. The numbers of neuropsychologists planning to retire in the coming 5-10 years do not suggest a "baby boomer" effect or an unexpected bolus of planned retirements in the next 10 years that would be large enough to be worrisome. Average length of time reported for evaluations appears to be increasing across time. The most common factors affecting evaluation length were identified, with the top three being: (1) goal of evaluation, (2) stamina/health of examinee, and (3) age of examinee. Pediatric specialists remain more likely than others to work part-time, more likely to work in institutions, report lower incomes than respondents with a lifespan professional identity, and are far more likely to be women. Incomes continue to vary considerably by years of clinical practice, work setting, amount of forensic practice, state, and region of country. Neurologists are the number one referral source in institutions and in private practice, as well as for pediatric, adult, and lifespan practitioners. Learning disability is no longer among the top five conditions seen by pediatric neuropsychologists; traumatic brain injury and seizure disorder are common reasons for clinical evaluations at all age ranges. There is a continued increase in forensic practice and a clear consensus on the use of validity testing. There is a substantial interest in subspecialization board certification, with the greatest interest evident among postdoctoral trainees. Income satisfaction, job satisfaction, and work-life balance satisfaction are higher for men. Job satisfaction varies across general work setting and across age range of practice. Work-life balance satisfaction is moderately correlated with income satisfaction and job satisfaction. Again in this five-year interval survey, a substantial majority of respondents reported increased incomes, despite experiencing substantial negative practice effects related to changes in the US health care system. Numerous breakdowns related to income and professional activities are provided. CONCLUSIONS: Professional practice survey information continues to provide valuable perspectives regarding consistency and change in the activities, beliefs, and incomes of US clinical neuropsychologists.

Impact of 6-month aerobic exercise on Alzheimer's symptoms.

Little is known about how aerobic exercise affects Alzheimer's disease (AD). The purpose of this pilot study was to test the impact of 6-month cycling on AD symptoms in community-dwelling older adults with mild-to-moderate AD, using a single-group, repeated-measures design (n = 26). AD symptoms were measured with the AD Assessment Scale-Cognitive (ADAS-Cog), Disability in AD (DAD), and Neuropsychiatric Inventory-Caregiver (NPI-Q) scales at baseline, 3 and 6 months. Data were analyzed using mixed linear models. The ADAS-Cog, DAD, and NPI-Q severity scores remained unchanged over the 6-month period, while caregiver distress decreased 40% (p < .05). We conclude that aerobic exercise may reduce AD symptoms and appears effective in decreasing caregiver distress. Further randomized controlled trials are needed to examine the effects of aerobic exercise in AD.

Effects of aerobic exercise on cognition and hippocampal volume in Alzheimer's disease: study protocol of a randomized controlled trial (The FIT-AD trial).

BACKGROUND: Alzheimer's disease, a global public health issue, accounts for 60 to 80% of all dementias. Alzheimer's disease primarily causes cognitive impairment and drugs have only modest short-term effects, highlighting a pressing need to develop effective interventions. Aerobic exercise holds promise for treating cognitive impairment in Alzheimer's disease through biologically sound mechanisms. Nonetheless, aerobic exercise studies in Alzheimer's disease are limited with mixed findings. METHODS/DESIGN: This pilot randomized controlled trial will investigate the effects of a 6-month, individualized, moderate-intensity cycling intervention (20 to 50 minutes per session, 3 times a week) on cognition and hippocampal volume in community-dwelling older adults with mild-to-moderate Alzheimer's disease. The specific aims are to: 1) determine the immediate effect of the cycling intervention on cognition in Alzheimer's disease; 2) examine if the cycling intervention slows cognitive decline in Alzheimer's disease from baseline to 12 months; and 3) assess the effect of aerobic exercise on hippocampal volume over 12 months. Ninety subjects will be randomized on a 2:1 allocation ratio to cycling or attention control (low-intensity stretching) and followed for another 6 months. Allocations will be concealed to all investigators and outcome assessors will be blinded to group assignments and previous data. Cognition will be measured by the Alzheimer's disease Assessment Scale-Cognition at baseline before randomization and at 3, 6, 9, and 12 months. Hippocampal volume will be measured by magnetic resonance imaging at baseline and 6 and 12 months. The sample size of 90 will give 80% power to detect a 2.5-point difference in within-group changes in the Alzheimer's disease Assessment Scale-Cognition at 6 months for the cycling group. DISCUSSION: Findings from this study will address the critical gap of exercise efficacy in Alzheimer's disease and use of magnetic resonance imaging as an outcome measure in clinical trials. This study will provide a potential treatment that may increase physical function and quality of life and curb the prohibitive costs for the growing dementia population. TRIAL REGISTRATION: Primary registration: (NCT01954550; date of registration: 20 September 2013). Secondary registration: (NCT01954550; date of registration: 1 October 2013).