Neuropsychological correlates of evocative multimodal speech: The combined roles of fearful prosody, visuospatial attention, cortisol response, and anxiety.

Past research reveals left-hemisphere dominance for linguistic processing and right-hemisphere dominance for emotional prosody processing during auditory language comprehension, a pattern also found in visuospatial attention studies where listeners are presented with a view of the talker's face. Is this lateralization pattern for visuospatial attention and language processing upheld when listeners are experiencing a stress response? To investigate this question, participants completed the Trier Social Stress Test (TSST) between administrations of a visuospatial attention and language comprehension dual-task paradigm. Subjective anxiety, cardiovascular, and saliva cortisol measures were taken before and after the TSST. Higher language comprehension scores in the post-TSST neutral prosody condition were associated with lower cortisol responses, differences in blood pressure, and less subjective anxiety. In this challenging task, visuospatial attention was most focused at the mouth region, both prior to and after stress induction. Greater visuospatial attention on the left side of the face image, compared to the right side, indicated greater right hemisphere activation. In the Fear, but not the Neutral, prosody condition, greater cortisol response was associated with greater visuospatial attention to the left side of the face image. Results are placed into theoretical context, and can be applied to situations where stressed listeners must interpret emotionally evocative language.

Minimal Hepatic Encephalopathy in Patients with Alcohol Related and Non-alcoholic Steatohepatitis Related Cirrhosis by Psychometric Hepatic Cephalopathy Score and Critical Flicker Frequency.

BACKGROUND: alcohol may have additional neurotoxic ill-effects in patients with alcohol related cirrhosis apart from hepatic encephalopathy. We aimed to evaluate minimal hepatic encephalopathy (MHE) with Psychometric Hepatic Encephalopathy (PHES) score and Critical Flicker Frequency (CFF) in alcohol (ALD) and non-alcoholic steatohepatitis related (NASH) related cirrhosis. METHODS: 398 patients were screened between March 2016 and December 2018; of which 71 patients were included in ALD group and 69 in NASH group. All included patients underwent psychometric tests which included number connection test A and B (NCT-A and NCT-B), serial dot test (SDT), digit symbol test (DST), line tracing test (LTT) and CFF. MHE was diagnosed when their PHES was <-4. RESULTS: the prevalence of MHE was significantly higher in ALD group compared to NASH (69.01% vs 40.58%; P=0.007). The performance of individual psychometric tests was significantly poorer in ALD (P<0.05). Overall sensitivity and specificity of CFF was 76.62% (95%CI 65.59 - 85.52) and 46.03% (95%CI 33.39 - 59.06) respectively. Mean CFF was significantly lower in ALD than NASH (37.07 (SD 2.37) vs 39.05 (SD 2.40), P=0.001); also in presence of MHE (36.95 (SD 2.04) vs 37.96 (SD 1.87), P=0.033) and absence of MHE (37.34 (SD 3.01) vs 39.79 (SD 2.46), P=0.001). CONCLUSION: MHE is significantly more common in patients with ALD cirrhosis than NASH counterparts. Overall CFF values are less in alcohol related cirrhosis than NASH related cirrhosis, even in presence or absence of MHE. We recommend additional caution in managing MHE in ALD cirrhosis.

Amplitude of low frequency fluctuations (ALFF) of spontaneous and induced rumination in major depression: An fNIRS study.

In the current study, we investigated the amplitude of low frequency fluctuations (ALFF) at rest and during a rumination induction. Specifically, we explored the differences of cortical blood oxygenation using fNIRS in subjects with Major Depressive Disorder (MDD) and healthy controls (HC). Rumination was assessed as state and trait measure, as well as with a qualitative semi-structured interview. Qualitative and quantitative measures of rumination indicated that the MDD group showed elevated rumination regarding state and trait measures. Furthermore, rumination differed qualitatively between the groups. The MDD group showed higher levels of general rumination and increased rumination during the rumination induction. However, the MDD group did not show a carry-over effect of elevated rumination after the induction paradigm to the following resting-state measurement. On a neuronal level, we observed a general hypoactivity in the MDD group compared to the HC group. Moreover, both groups showed increased ALFF during the rumination induction compared to the rest phase, especially in temporo-parietal areas. However, no interaction effect of MDD status and rumination induction was found. The current findings are discussed with respect to the literature of paradigms used in the investigation of rumination and suggestions on general improvements in rumination research are given.

Detecting Cheating Methods on Unproctored Internet Tests / Métodos de Detección del Falseamiento en Test Online

BACKGROUND: Unproctored Internet Tests (UIT) are vulnerable to cheating attempts by candidates to obtain higher scores. To prevent this, subsequent procedures such as a verification test (VT) is carried out. This study compares five statistics used to detect cheating in Computerized Adaptive Tests (CATs): Guo and Drasgow's Z-test, the Adaptive Measure of Change (AMC), Likelihood Ratio Test (LRT), Score Test, and Modified Signed Likelihood Ratio Test (MSLRT). METHOD: We simulated data from honest and cheating candidates to the UIT and the VT. Honest candidates responded to the UIT and the VT with their real ability level, while cheating candidates responded only to the VT, and different levels of cheating were simulated. We applied hypothesis tests, and obtained type I error and power rates. RESULTS: Although we found differences in type I error rates between some of the procedures, all procedures reported quite accurate results with the exception of the Score Test. The power rates obtained point to MSLRT's superiority in detecting cheating. CONCLUSIONS: We consider the MSLRT to be the best test, as it has the highest power rate and a suitable type I error rate

ANTECEDENTES: las pruebas de selección en línea sin vigilancia (UIT) son vulnerables a intentos de falseamiento para obtener puntuaciones superiores. Por ello, en ocasiones se utilizan procedimientos de detección, como aplicar posteriormente un test de verificación (VT). El objetivo del estudio es comparar cinco contrastes estadísticos para la detección del falseamiento en Test Adaptativos Informatizados: Z-test de Guo y Drasgow, Medida de Cambio Adaptativa (AMC), Test de Razón de Verosimilitudes (LRT), Score Test y Modified Signed Likelihood Ratio Test(MSLRT). MÉTODO: se simularon respuestas de participantes honestos y falseadores al UIT y al VT. Para los participantes honestos se simulaban en ambos en función de su nivel de rasgo real; para los falseadores, solo en el VT, y en el UIT se simulaban distintos grados de falseamiento. Después, se obtenían las tasas de error tipo I y potencia. RESULTADOS: Se encontraron diferencias en las tasas de error tipo I entre algunos procedimientos, pero todos menos el Score Test se ajustaron al valor nominal. La potencia obtenida era significativamente superior con el MSLRT. CONCLUSIONES: consideramos que MSLRT es la mejor alternativa, ya que tiene mejor potencia y una tasa de error tipo I ajustada

Health anxiety and attentional bias toward virus-related stimuli during the COVID-19 pandemic.

After the COVID-19 worldwide spread, evidence suggested a vast diffusion of negative consequences on people's mental health. Together with depression and sleep difficulties, anxiety symptoms seem to be the most diffused clinical outcome. The current contribution aimed to examine attentional bias for virus-related stimuli in people varying in their degree of health anxiety (HA). Consistent with previous literature, it was hypothesized that higher HA would predict attentional bias, tested using a visual dot-probe task, to virus-related stimuli. Participants were 132 Italian individuals that participated in the study during the lockdown phase in Italy. Results indicated that the HA level predicts attentional bias toward virus-related objects. This relationship is double mediated by the belief of contagion and by the consequences of contagion as assessed through a recent questionnaire developed to measure the fear for COVID-19. These findings are discussed in the context of cognitive-behavioral conceptualizations of anxiety suggesting a risk for a loop effect. Future research directions are outlined.

Relationship between frustration intolerance and personality dimensions

Frustration is a negative state triggered by unexpected reward loss with behavioral, emotional and motivational components. Frustration Intolerance (FI) has been considered a vulnerability marker for psychopathology, its impact being modulated by personality dimensions. In this study, the relationship between FI and personality dimensions was analyzed in 640 undergraduate students. The reduced version of the Revised NEO Personality Inventory and the Sensitivity to Punishment and Sensitivity to Reward Questionnaire assessed personality dimensions. The Investigative Scale of Tolerance to Frustration, the Frustration Discomfort Scale, and the Frustrative Nonreward Responsiveness Scale assessed the behavioral, emotional and motivational components of FI, respectively. Descriptive, reliability, Pearson and partial correlation analyses were conducted. Regardless of the frustration component assessed, FI consistently and positively correlated with Neuroticism, Sensitivity to Punishment and Sensitivity to Reward. The relationship between FI and other personality dimensions seemed to be dependent on the particular FI assessment instrument used and on the corresponding component involved: Behavioral FI correlated positively with Extraversion and negatively with Openness and Agreeableness, whereas the relationship between these personality dimensions and emotional and motivational FI was not so clear. Therefore, a systematic analysis of the components of FI seems to be necessary to understand its relationship with personality

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Database of virtual objects to be used in psychological research.

Although many visual stimulus databases exist, to our knowledge, none includes 3D virtual objects, that can directly be used in virtual reality (VR). We present 121 objects that have been developed for scientific purposes. The objects were built in Maya, and their textures were created in Substance Painter. Then, the objects were exported to an FBX and OBJ format and rendered online using the Unreal Engine 4 application. Our goal was to develop the first set of high-quality virtual objects with standardized names, familiarity, and visual complexity. The objects were normed based on the input of 83 participants. This set of stimuli was created for use in VR settings and will facilitate research using VR methodology, which is increasingly employed in psychological research.

Adaptación y validación al español de la escala de Bienestar Psicológico EMMBEP en estudiantes de Enfermería / Adaptation and validation into Spanish of the EMMBEP Psychological Well-being scale in Nursing students

INTRODUCCIÓN: La pandemia por CO-VID-19 podría estar dejando secuelas de tipo psicológico en la población. Tanto el hecho esperable de una reinfección de ámbito mundial, como la distribución temporal desigual entre países, nos imponen la necesidad de estar preparados y contar con herramientas que tengan la capacidad de medir en el contexto adecuado la respuesta personal ante esta crisis. OBJETIVO: Llevar a cabo la traducción, adaptación transcultural y validación para estudiantes de Grado en Enfermería de España de la "Escala de Medida de las Manifestaciones del Bienestar Psicológico". MÉTODO: La población diana fueron los estudiantes de los cuatro cursos del Grado en Enfermería de la Universidad Católica de Valencia. La recogida de datos se implementó a través de un cuestionario on line dentro del protocolo @student-sONquarentine. La muestra final quedó constituida por 375 estudiantes. RESULTADOS Y CONCLUSIÓN: Se mantiene la estructura factorial de la escala portuguesa. KMO: 0,923; T. de Bartlett: 4552,347 (p =.000) y r de Pearson por factores entre .702 y .861. Por lo que contamos con un instrumento con criterios óptimos de validez de constructo y fiabilidad para la medida del Bienestar Psicológico en estudiantes de Grado en Enfermería en condiciones de aislamiento

INTRODUCTION: The COVID-19 pandemic could be leaving psychological consequences in the population, both the expected fact of a global reinfection, and the unequal temporal distribution between countries, impose on us the need to be prepared and have tools with the ability to measure in the appropriate context the personal response to this crisis. OBJECTIVE: To carry out the translation, cross-cultural adaptation and validation for students of Bachelor of Nursing in Spain of the "Measurement Scale of the Manifestations of Psychological Well-being". METHOD: The target population was the students of the four courses of the Nursing Degree of the Catholic University of Valencia. Data collection was implemented through an online questionnaire within the @studentsONquarentine protocol. The final sample was made up of 375 students. RESULTS AND CONCLUSION: The factorial structure of the Portuguese scale is maintained. KMO: 0.923; Bartlett's T. 4552.347 (p = .000) and Pearson's r by factors between .702 and .861. Therefore, we have an instrument with optimal criteria of construct validity and reliability for the measurement of Psychological Well-being in Nursing Degree students in conditions of isolation

¿Influye el trauma infantil en el reconocimiento de las emociones faciales independientemente del diagnóstico de trastorno mental grave? / Can childhood trauma influence facial emotion recognition independently from a diagnosis of severe mental disorder?

INTRODUCCIÓN: El reconocimiento de las expresiones faciales (REF) es un componente fundamental en la interacción social. Sabemos que dicho REF se encuentra alterado tanto en los pacientes con trastorno mental grave (TMG) como en los que padecen antecedentes de trauma infantil. MATERIAL Y MÉTODOS: Pretendemos analizar la posible relación entre la existencia de trauma en la infancia más allá de la presencia de un TMG, medido mediante la escala CTQ y el reconocimiento de las expresiones faciales, en una muestra con tres tipos de sujetos (n=321): controles sanos (n=179), pacientes con TLP (n=69) y primeros episodios psicóticos (n=73). Así mismo, se recogieron variables clínicas y datos sociodemográficos. Se analizó dicha relación mediante una técnica de regresión multivariante ajustando por el sexo, la edad, el CI, el consumo actual de tóxicos y el grupo al que pertenece el sujeto. RESULTADOS: El trauma sexual y/o físico en la infancia se relacionó de forma independiente de la existencia de TMG con un peor ratio de REF total, además de con una peor tasa de reconocimiento en las expresiones de felicidad. Además, los sujetos con antecedentes de trauma en la infancia atribuyeron con mayor frecuencia expresiones de enfado y miedo a las caras neutras y felices, independientemente de otras variables. CONCLUSIONES: La existencia de trauma en la infancia parece influir de manera independiente al TMG en la capacidad de los sujetos de reconocer expresiones faciales. Dado que el trauma es un factor prevenible y con un tratamiento específico, se debería prestar atención a la existencia de este antecedente en las poblaciones clínicas

INTRODUCTION: Facial emotion recognition (FER) is a fundamental component in social interaction. We know that FER is disturbed in patients with severe mental disorder (SMD), as well as those with a history of childhood trauma. MATERIAL AND METHODS: We intend to analyze the possible relationship between the existence of trauma in childhood irrespective of a SMD, measured by the CTQ scale and facial expression recognition, in a sample of three types of subjects (n=321): healthy controls (n=179), patients with BPD (n=69) and patients with a first psychotic episode (n=73). Likewise, clinical and socio-demographic data were collected. The relationship was analyzed by a technique of multivariate regression adjusting for sex, age, IQ, current consumption of drugs and group to which the subject belonged. RESULTS: Sexual and/or physical trauma in childhood related independently to the existence of SMD with a worse total FER ratio, as well as to a worse rate of recognition in expressions of happiness. Furthermore, the subjects with a history of childhood trauma attributed expressions of anger and fear more frequently to neutral and happy faces, irrespective of other variables. CONCLUSIONS: The existence of trauma in childhood seems to influence the ability of subjects to recognize facial expressions, irrespective of SMD. Trauma is a preventable factor with specific treatment; therefore, attention should be paid to the existence of this background in clinical populations

Measuring achievement striving via a situational judgment test: the value of additional context / Medición del esfuerzo hacia el logro mediante de un test de juicio situacional: el valor del contexto adicional

The study extends personality and situational judgment test (SJT) research by using an SJT to measure achievement striving in a contextualized manner. Employed students responded to the achievement striving SJT, traditional personality scales, and workplace performance measures. The SJT was internally consistent, items loaded on a single factor, and scores converged with other measures of achievement striving. The SJT provided incremental criterion-related validity for the performance criteria beyond less-contextualized achievement striving measures. Findings suggest that achievement-related work scenarios may provide additional criterion-relevant information not captured by measures that are less contextualized

Este estudio extiende la investigación sobre los tests de juicio situacional (TJS) y la personalidad, usando un TJS para medir el esfuerzo hacia el logro de una manera contextualizada. Estudiantes con empleo respondieron el TJS de esfuerzo hacia el logro, escalas típicas de personalidad y medidas de desempeño en el trabajo. El TJS fue internamente consistente, los ítems cargaron en un único factor y las puntuaciones convergieron con otras medidas de esfuerzo hacia el logro. El TJS añadió validez relacionada con el criterio, para los criterios de desempeño, a la validez de las medidas menos contextualizadas de esfuerzo hacia el logro. Los hallazgos sugieren que escenarios de trabajo relacionados con el logro pueden proporcionar información adicional relevante para el criterio no capturada por medidas menos contextualizadas

Searching for the HERO in Youth: Does Psychological Capital (PsyCap) Predict Mental Health Symptoms and Subjective Wellbeing in Australian School-Aged Children and Adolescents?

Psychological capital (PsyCap) comprising the positive psychological resources of hope, efficacy, resilience, and optimism (HERO) has strong empirical associations with increased wellbeing and reduced mental health symptoms in adult samples. Emerging studies of PsyCap among school-age students have also shown preliminary, positive associations between PsyCap and student wellbeing. The present study is the first to examine PsyCap-HERO constructs and associations with both mental health symptoms and subjective wellbeing in school-aged children and adolescents (aged 9-14 years). A convenience sample of Australian school students (N = 456, Mage = 11.54, SD = 1.20, 47% female) completed an online survey during class time. Measures of hope, efficacy, resilience, optimism, flourishing, anxiety, and depression previously well-validated in school samples were used. Significant associations between each HERO construct and flourishing, anxiety and depression symptoms in the expected direction were found, and importantly, the combination of HERO constructs was shown to be a stronger predictor of increased levels of student flourishing, and decreased levels of anxiety and depression symptoms, than individual HERO constructs. Findings indicate that student PsyCap may be a promising area of further investigation for schools, policymakers, clinicians and researchers looking to identify positive psychological resources in youth that may buffer poor mental health and promote wellbeing.

D-optimal design for the Rasch counts model with multiple binary predictors.

In this paper we derive optimal designs for the Rasch Poisson counts model and its extended version of the (generalized) negative binomial counts model incorporating several binary predictors for the difficulty parameter. To efficiently estimate the regression coefficients of the predictors, locally D-optimal designs are developed. After an introduction to the Rasch Poisson counts model and its extension, we will specify these models as particular generalized linear models. Based on this embedding, optimal designs for both models including several binary explanatory variables will be presented. Therefore, we will derive conditions on the effect sizes for certain designs to be locally D-optimal. Finally, it is pointed out that the results derived for the Rasch Poisson models can be applied for more general Poisson regression models which should receive more attention in future psychological research.

The effect of the age on outcomes at a cardiac rehabilitation center in Turkey.

OBJECTIVE: The aim of this study was to assess the effectiveness of a 12-week phase II cardiac rehabilitation (CR) program in Turkish patients aged between ≤65 years and >65 years using psychical parameters, echocardiography measurements, lipid profiles, and psychological parameters. METHODS: A total of 68 patients who completed a phase II CR program were enrolled in this retrospective study. The echocardiography measurements, as well as assessment of physical parameters, psychological state, and serum lipid level of the patients were evaluated before the entry into the program and just after the completion. Patients were divided into 2 groups: those aged 65 years and under and those over the age of 65, and the effects of the CR program were compared. RESULTS: There was a statistically significant difference in the average heart rate (HR), left ventricular ejection fraction (LVEF), Beck Depression Inventory (BDI) score, and State-Trait Anxiety Inventory (STAI) I-II scores of young patients before and after cardiac rehabilitation. The LVEF, high-density lipoprotein (HDL), BDI, STAI-I, and STAI-II parameters of older patients were statistically significant. In the comparison between those who were 65 years and under and those over the age of 65, the change in the mean HR (+11.24±12.62 bpm vs. +3.96±12.50 bpm; p=0.039), LVEF (+21.31±21.37% vs. +9.55±13.50%; p=0.035) and STAI I scores (-11.33±11.51 points vs. -23.25±14.08 points; p=0.025) were significantly different. CONCLUSION: The results of the present study revealed that patients in a Turkish population aged 65 and over benefited from CR as much as younger patients did in terms of physical parameters, echocardiography measurements, lipid profiles, and psychological parameters.

Implementation of a modified multiple mini-interview method to assess non-cognitive qualities during resident candidate interviews.

BACKGROUND AND PURPOSE: Conventional onsite interview methods often make comparing applicants difficult. Literature has noted conventional interviews leave room for bias and high interrater variability, making non-cognitive attributes difficult to ascertain. In 2016, the residency committee of a small, multi-site, academic-based postgraduate year one residency program implemented a modified multiple mini-interview (MMI) approach as a component of the residency interview process to better qualify candidate attributes. EDUCATIONAL ACTIVITY AND SETTING: A modified MMI was developed to address the non-cognitive attributes, ethical reasoning, communication, and professionalism. Scenarios, scripts, questions, and rubrics were developed by residency committee members. The author of the case was assigned to role play that scenario with candidates while other committee members silently observed. Candidates and residency committee members were surveyed to explore their perception of the MMI as a component of the residency interview process. FINDINGS: Thirty-one candidates have been interviewed since the incorporation of the modified MMI. Of those, 20 completed the post-interview survey. The majority of resident candidates (55%) completing the survey felt they were able to portray strengths and abilities more effectively vs. a conventional interview. Of the five residency committee members, all (100%) completed the survey and all (100%) perceived implementation of the modified MMI provided increased confidence in determining candidate ranking. SUMMARY: Implementation of a modified MMI approach to an onsite residency interview process assisted residency committee members in assessing non-cognitive attributes and contributed to greater confidence in determining resident candidate ranking.

Minimum Distance Estimation of Multidimensional Diffusion-Based Item Response Theory Models.

Diffusion-based item response theory models are models for responses and response times on psychological tests, which can be used as measurement models in the same way as standard item response theory models (Tuerlinckx, Molenaar, & van der Maas, 2016). Their range of application, however, is narrowed by the fact that multidimensional versions of the model are not easy to fit. Marginal maximum likelihood estimation (e.g., Molenaar, Tuerlinckx, & van der Maas, 2015a) is computationally intensive and infeasible for multidimensional versions. The weighted least squares estimator of Ranger, Kuhn, and Szardenings (2016) is inefficient. Here, we propose an alternative estimator that is more efficient than the least squares estimator and less demanding than the maximum likelihood estimator. The estimator is based on minimum distance estimation and consists in modeling the sample quantiles and sample covariances. The performance of the estimator is investigated in a simulation study. The simulation study corroborates that the estimator performs well. The application of the estimator is demonstrated with real data.

Sleep Quality and Health-Related Quality of Life in Older People With Subjective Cognitive Decline, Mild Cognitive Impairment, and Alzheimer Disease.

We aimed to investigate sleep quality and health-related quality of life (HRQOL) in older adults with subjective cognitive decline (SCD), mild cognitive impairment (MCI), and Alzheimer disease (AD). A total of 221 participants were divided into the following five groups: normal controls (NCs), SCD without memory concerns (SCD-0), SCD with memory concerns (SCD-1), MCI, and AD according to their cognitive status. Compared with NC, individuals with SCD-0, SCD-1, MCI, and AD had more sleep problems and reduced HRQOL. Participants with poor sleep quality had an increased risk of cognitive impairment compared with participants with good sleep quality. Within all five subgroups, individuals with poor sleep quality reported more difficulties in HRQOL than individuals with good sleep quality. Future studies employing a longitudinal design, larger samples, and objective evaluation tools are needed.

Validation of the Scale of Basic Psychological Needs towards Physical Exercise, with the Inclusion of Novelty.

The purpose of this study was to validate and adapt to the Spanish context of Physical Education, the Spanish version of the Scale of Basic Psychological Needs in the context of physical exercise, with the incorporation of novelty to the scale. The sample that took part in the study was 2372 people from 16 to 48 years old from the province of Almeria. In order to analyze the psychometric properties of the scale, several analyses have been carried out. The results have offered support both for the eight-factor structure and for the higher-order double model where the eight subscales are joined into two constructs called frustration and satisfaction. The structure of both models was invariant with respect to gender and age. Cronbach's alpha values were above 0.70 in the subscales and scales; and adequate levels of temporal stability. In addition, the subfactors pertaining to the satisfaction of basic psychological needs positively predicted the intrinsic motivation for physical activity, while each of the subfactors of the frustration of psychological needs predicted it negatively. The results of this study provide evidence of the reliability and validity of the BPNS in the Spanish context of physical activity.

Do Parental Interviews for ASD Converge with Clinical Diagnoses? An Empirical Comparison of the 3di and the DISCO in Children with ASD, a Clinically-Referred Group, and Typically Developing Children.

Two semi-structured parental interviews are available with algorithms developed to measure DSM-5 criteria of ASD, namely the Developmental, Dimensional and Diagnostic Interview (3di) and the Diagnostic Interview for Social and Communication Disorders (DISCO-11). The main aim of this study was to examine the agreement between classification according to both interviews, and their convergence with the clinical diagnosis. Therefore, the 3di and DISCO-11 were administered from three groups of parents of a 4-18 year old. Results showed 75% agreement between both instruments, but in the ASD group only 16% of the children scored above threshold on both instruments. Exploratory analyses suggested that the 3di failed to detect rigid and repetitive behaviors, whereas the DISCO-11 was insufficiently sensitive in detecting socio-communicative problems.

Do left-handers outperform right-handers in paper-and-pencil tests of attention?

The present study investigated the impact of the dominant hand on performance in two paper-and-pencil tests of visual selective attention (d2-R; FAIR-2). We hypothesized that preview benefits (i.e., preprocessing of stimuli located to the right of the currently fixated item) could improve test performance of left-handers as compared to right-handers because using the right hand could prevent preview benefits simply by covering subsequent stimuli. A group of left-handed students (n = 86) and a group of right-handed students (n = 90) completed both the test d2-R and the test FAIR-2 with their dominant (writing) hand. Results showed that left-handed participants outperformed right-handers in both tests. Hence, when the results of left-handers are to be compared to right-handers or to normative data (which are dominated by right-handers), the impact of preview benefits on left-hander performance should be taken into account.

Point-biserial correlation: Interval estimation, hypothesis testing, meta-analysis, and sample size determination.

The point-biserial correlation is a commonly used measure of effect size in two-group designs. New estimators of point-biserial correlation are derived from different forms of a standardized mean difference. Point-biserial correlations are defined for designs with either fixed or random group sample sizes and can accommodate unequal variances. Confidence intervals and standard errors for the point-biserial correlation estimators are derived from the sampling distributions for pooled-variance and separate-variance versions of a standardized mean difference. The proposed point-biserial confidence intervals can be used to conduct directional two-sided tests, equivalence tests, directional non-equivalence tests, and non-inferiority tests. A confidence interval for an average point-biserial correlation in meta-analysis applications performs substantially better than the currently used methods. Sample size formulas for estimating a point-biserial correlation with desired precision and testing a point-biserial correlation with desired power are proposed. R functions are provided that can be used to compute the proposed confidence intervals and sample size formulas.