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1.
Am J Public Health ; 113(12): 1267-1270, 2023 12.
Artigo em Inglês | MEDLINE | ID: mdl-37797280

RESUMO

Addressing the behavioral health needs of youths involved in the justice system is key to reducing recidivism risk and preventing long-term system involvement. However, rates of treatment referral and initiation remain low, especially among minoritized youths and boys. The e-Connect System, a digital, clinical decision support system, addresses this problem by increasing rates of behavioral health treatment referral and initiation rates among youths on probation. In this study, we examine whether e-Connect helps improve equity in referral and treatment initiation outcomes. (Am J Public Health. 2023;113(12):1267-1270. https://doi.org/10.2105/AJPH.2023.307417).


Assuntos
Reincidência , Masculino , Humanos , Adolescente , Estados Unidos/epidemiologia , Reincidência/prevenção & controle , Resultado do Tratamento , Encaminhamento e Consulta , Cognição , Administração de Caso
2.
Int J Neurosci ; 128(12): 1135-1142, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29883231

RESUMO

Research suggests that increasing delays in stimulus read-out can trigger declines in serial order recall accuracy due to increases in cognitive demand imposed by the delay; however, the exact neural mechanisms associated with this decline are unclear. Changes in neural resource allocation present as the ideal target and can easily be monitored by examining changes in the amplitude of an ERP component known as the P3. Changes in P3 amplitude secondary to exogenous pacing of stimulus read-out via increased target-to-target intervals (TTIs) during recall could reflect decreased neural resource allocation due to increased cognitive demand. This shift in resource allocation could result in working memory storage decay and the declines in serial order accuracy described by prior research. In order to examine this potential effect, participants were administered a spatial serial order processing task, with the recall series consisting of a series of correct ('match') or incorrect ('non-match' or 'oddball') stimuli. Moreover, the recall series included either a brief (500 ms) or extended (2000 ms) delay between stimuli. Results were significant for the presence of a P3 response to non-match stimuli for both experimental conditions, and attenuation of P3 amplitude secondary to the increase in TTI. These findings suggest that extending the delay between target recognition could increase cognitive demand and trigger a decrease in neural resource allocation that results in a decay of working memory stores.


Assuntos
Encéfalo/fisiologia , Potenciais Evocados P300 , Memória de Curto Prazo/fisiologia , Rememoração Mental/fisiologia , Processamento Espacial/fisiologia , Adulto , Eletroencefalografia , Humanos , Reconhecimento Visual de Modelos/fisiologia , Estimulação Luminosa , Adulto Jovem
3.
Brain Cogn ; 111: 63-72, 2017 02.
Artigo em Inglês | MEDLINE | ID: mdl-27816781

RESUMO

Although researchers have long hypothesized a relationship between attention and anxiety, theoretical and empirical accounts of this relationship have conflicted. We attempted to resolve these conflicts by examining relationships of attentional abilities with responding to predictable and unpredictable threat - related but distinct motivational process implicated in a number of anxiety disorders. Eighty-one individuals completed a behavioral task assessing efficiency of three components of attention - alerting, orienting, and executive control (Attention Network Test - Revised). We also assessed startle responding during anticipation of both predictable, imminent threat (of mild electric shock) and unpredictable contextual threat. Faster alerting and slower disengaging from non-emotional attention cues were related to heightened responding to unpredictable threat, whereas poorer executive control of attention was related to heightened responding to predictable threat. This double dissociation helps to integrate models of attention and anxiety and may be informative for treatment development.


Assuntos
Ansiedade/psicologia , Atenção/fisiologia , Função Executiva/fisiologia , Medo/fisiologia , Adulto , Antecipação Psicológica/fisiologia , Feminino , Humanos , Masculino , Reflexo de Sobressalto/fisiologia , Adulto Jovem
4.
J Nerv Ment Dis ; 204(4): 306-13, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26658660

RESUMO

Several personality traits are risk factors for psychopathology. As symptoms of psychopathology may influence self-rated personality, informant reports of personality are also sometimes collected. However, little is known about self-informant agreement in individuals with anxiety and/or depression. We investigated whether self-informant agreement on positive and negative affectivity (PA and NA) and anxiety sensitivity differs for individuals with major depressive disorder (MDD) and/or panic disorder (PD; total n = 117). Informant- and self-reported PA was correlated among those with MDD, but not among those without MDD. Informant- and self-reported anxiety sensitivity was correlated among those with PD, but not among those without PD. Informant- and self-reported NA was correlated irrespective of diagnosis. Results indicate that the agreement of self- and informant-reported personality may vary as a function of depression and/or anxiety disorders.


Assuntos
Transtorno Depressivo Maior/diagnóstico , Transtorno Depressivo Maior/psicologia , Transtorno de Pânico/diagnóstico , Transtorno de Pânico/psicologia , Determinação da Personalidade/estatística & dados numéricos , Autorrelato , Inquéritos e Questionários , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Variações Dependentes do Observador , Psicometria/estatística & dados numéricos , Análise de Regressão , Reprodutibilidade dos Testes , Fatores de Risco , Estatística como Assunto , Adulto Jovem
5.
Cogn Emot ; 30(8): 1495-1503, 2016 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26212088

RESUMO

There is a growing literature associating anxiety disorders with an inability to inhibit defensive responding during safety conditions of threatening tasks. However, investigations on the relation between panic disorder (PD) and defensive responding to safety have yielded mixed results. A recent study from our laboratory revealed that intolerance of uncertainty (IU) moderates this association, such that only individuals with PD and a high IU exhibit heightened startle potentiation during safety. The mechanism underlying this relationship is unknown. Given that safety conditions typically alternate with periods of threat, cognitive flexibility (i.e., the ability to adjust one's habitual responding to a situation, given the input of new information) may be involved in the ongoing reappraisal of danger and adjustment of defensive responding. Thus, the present study sought to investigate whether deficits in cognitive flexibility mediate the association between IU and defensive responding to safety among a sample of 71 adults diagnosed with PD. As hypothesised, cognitive flexibility mediated the relationship between IU and heightened startle potentiation during safety conditions. This finding suggests that within this subgroup, a failure to inhibit defensive responding during safety conditions may be due to deficits in cognitive flexibility.

6.
Cogn Emot ; 29(5): 867-81, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25195915

RESUMO

The Val(158)Met rs4680 polymorphism in the COMT gene regulates dopamine catabolism in the prefrontal cortex (PFC). Dopamine's involvement in reward experience suggests those with the methionine (Met) variant may exhibit trait-level sensitivity to reward due to more post-synaptic dopamine in the PFC. A physiological mediator of this association may be greater relative left asymmetry in the PFC, a putative biomarker for trait positive emotionality. Electroencephalograms of 120 participants were measured during a task that assesses two aspects of reward processing: pre-reward anticipation and post-reward consummatory affect. Participants provided genetics samples and completed the Temporal Experience of Pleasure Scale (TEPS), which assesses trait-level anticipatory and consummatory positive affect. Met carriers had higher TEPS-Consummatory scores. This effect was mediated by greater relative left activation in the post-reward phase of the task. No effects were observed for the pre-reward phase. Results suggest that frontal asymmetry is an endophenotype between COMT genotype and trait reward responsivity.


Assuntos
Afeto , Catecol O-Metiltransferase/genética , Lateralidade Funcional/fisiologia , Córtex Pré-Frontal/fisiologia , Recompensa , Eletroencefalografia , Endofenótipos , Feminino , Genótipo , Humanos , Masculino , Polimorfismo de Nucleotídeo Único/genética , Córtex Pré-Frontal/anatomia & histologia , Adulto Jovem
7.
Cogn Emot ; 28(1): 46-58, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-23746071

RESUMO

Individuals with anxiety disorders have previously demonstrated abnormal habituation to aversiveness over time. As anxiety sensitivity (AS), or an individuals' propensity to fear of anxiety-related sensations, has been shown to be a risk factor for anxiety disorders (particularly panic disorder), the present study examined whether AS was also associated with abnormal habituation. This association was examined in two independent samples of undergraduates (Ntotal=178). Habituation was operationalised as the reduction in startle response to multiple startle probes presented over 2.5 minutes and three definitions of this reduction were employed. Results indicated that individuals with higher levels of AS evidenced deficits in startle habituation, but the strength of this relationship was somewhat dependent on the definition of startle habituation, with the most robust definition being an analysis of participants' individual slopes across all nine blinks. The present findings suggest that startle habituation is a key mechanism underlying AS, and may help elucidate the role this risk factor plays in the pathogenesis of anxiety disorders.


Assuntos
Ansiedade/fisiopatologia , Habituação Psicofisiológica/fisiologia , Reflexo de Sobressalto/fisiologia , Piscadela/fisiologia , Feminino , Humanos , Masculino , Adulto Jovem
8.
Cogn Emot ; 28(4): 636-55, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24191979

RESUMO

Appetitive and defensive motivation account for a good deal of variance in personality and mental health, but whether individual differences in these systems are correlated or orthogonal has not been conclusively established. Previous investigations have generally relied on self-report and have yielded conflicting results. We therefore assessed the relation between psychophysiological indices of appetitive and defensive motivation during elicitation of these motivational states: specifically, frontal electroencephalogram asymmetry during reward anticipation and startle response during anticipation of predictable or unpredictable threat of shock. Results in a sample of psychopathology-free community members (n=63), an independent sample of undergraduates with a range of internalising symptoms (n=64), and the combination of these samples (n=127) revealed that differences in responding to the two tasks were not significantly correlated. Average coefficients approached zero in all three samples (community: .04, undergraduate: -.01, combined: .06). Implications of these findings for research on normal and abnormal personality are discussed.


Assuntos
Comportamento Apetitivo/fisiologia , Ondas Encefálicas/fisiologia , Individualidade , Motivação/fisiologia , Reflexo de Sobressalto/fisiologia , Adolescente , Adulto , Idoso , Antecipação Psicológica/fisiologia , Estimulação Elétrica , Eletroencefalografia , Emoções , Feminino , Lobo Frontal/fisiologia , Humanos , Masculino , Pessoa de Meia-Idade , Recompensa , Adulto Jovem
9.
J Nerv Ment Dis ; 201(9): 824-7, 2013 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23995040

RESUMO

Cross-sectional studies suggest that cognitive deficits contribute to psychosocial impairment among individuals with mood disorders. However, studies examining whether cognition prospectively predicts psychosocial outcome are few, have used short follow-up periods, and have not demonstrated incremental validity (i.e., that cognition predicts future functioning even when controlling for baseline functioning). In a sample of 51 individuals with unipolar depression or bipolar disorder, we investigated whether attention/processing speed (APS) performance predicted social functioning 18 years later. Baseline APS predicted 18-year social functioning even after controlling for baseline social functioning and depressive symptoms, demonstrating incremental validity. Individuals with high baseline APS had stable social functioning over 18 years, whereas functioning deteriorated among those with low APS. This finding helps clarify the temporal order of cognitive and psychosocial deficits associated with mood disorders and suggests the clinical utility of cognitive measures in identifying those at risk of deterioration in social functioning.


Assuntos
Atenção , Transtorno Bipolar/diagnóstico , Transtorno Bipolar/psicologia , Transtornos Cognitivos/diagnóstico , Transtornos Cognitivos/psicologia , Transtorno Depressivo/diagnóstico , Transtorno Depressivo/psicologia , Tempo de Reação , Ajustamento Social , Escalas de Wechsler/estatística & dados numéricos , Adulto , Feminino , Humanos , Estudos Longitudinais , Masculino , Valor Preditivo dos Testes , Estudos Prospectivos , Psicometria/estatística & dados numéricos
10.
J Psychophysiol ; 27(2): 95-104, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23788825

RESUMO

Research suggests that lower respiratory sinus arrhythmia (RSA) is associated with greater aversive responding. One physiological indicator of aversive responding is startle potentiation. While a few studies have demonstrated an inverse association between RSA and startle potentiation, no study to date has distinguished whether this relation is similar for predictable versus unpredictable aversive stimuli. This is an important distinction, given that degree of predictability has been shown to be an important determinant of aversive responding. The present study examined whether resting RSA was associated with startle eye blink responding during predictable and unpredictable threat of electric shock. Resting RSA was collected during a 6-minute seated baseline phase at the beginning of the experimental session. Participants then completed a computerized startle task in which predictable and unpredictable shocks were administered. Results indicated that lower resting RSA was associated with greater startle potentiation during unpredictable threat, but not during predictable threat. These findings are consistent with a growing body of literature suggesting that individual differences in RSA are associated with aversive responding, and extend previous work by suggesting that RSA may be more robustly associated with a heightened sensitivity to unpredictable threat. This pattern of results may have implications for the understanding of pathological anxiety given that individuals with anxiety disorders typically exhibit low RSA and heightened responding during unpredictable threat.

11.
J Consult Clin Psychol ; 91(9): 547-557, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37261738

RESUMO

OBJECTIVE: Youth involved in the justice system (YIJ) have higher rates of suicidal thoughts and behaviors (STB) and associated behavioral health (BH) problems, yet lower levels of service use compared to youth in the general population. This study examined the efficacy of e-Connect, a digital clinical decision support system (CDSS), at improving STB risk identification, referral, and linkage to BH services by probation officers. As the intervention spanned pre- and post-COVID-19 shutdown periods, we also examined the disruption in public agencies' service provision on study outcomes. METHOD: Administrative record data (1,488 youth, ages 10-18 years, 56% male, 56% White) allowed examination of differences between care-as-usual (baseline) and e-Connect in screening, identification of STB and BH problems, referral, and treatment initiation. RESULTS: Compared to care-as-usual, probation officers using e-Connect were over five times as likely to identify YIJ with STB (adjusted odds ratio [aOR] = 5.86; 95% confidence interval, CI [3.24, 11.7]) and over 11 times more likely to refer YIJ in need of BH services to treatment (aOR = 11.04; 95% CI [6.54, 19.43]). In turn, youth referred to treatment via e-Connect were nearly 17 times more likely to initiate (aOR = 16.92; 95% CI [9.17, 32.60]). Results remained unchanged during the pre- and post-COVID-19 shutdown periods. CONCLUSION: e-Connect is one of the first digital STB screening, referral, and linkage-to-service systems that use CDSS technology to successfully assist probation officers in linking youth on their caseload to treatment. Such an approach may support identification of STB and cross-systems linkage in other youth-serving organizations, such as schools, that increasingly manage youth BH problems with minimal clinical support. (PsycInfo Database Record (c) 2023 APA, all rights reserved).


Assuntos
COVID-19 , Comportamento Problema , Suicídio , Humanos , Adolescente , Masculino , Feminino , Serviços de Saúde , Ideação Suicida
12.
Arch Clin Neuropsychol ; 35(8): 1303-1311, 2020 Nov 19.
Artigo em Inglês | MEDLINE | ID: mdl-31745555

RESUMO

OBJECTIVE: Patients and other stakeholders generally report high satisfaction with neuropsychological evaluations (NPEs), but no research has examined effects of cognitive, emotional, and other factors that often prompt evaluations. A prospective, quasi-experimental study was conducted to examine self-reported cognitive and psychiatric symptoms, self-efficacy, motivation, and satisfaction following a NPE. METHOD: Participants from a neuropsychology clinic who were diagnosed with AD/HD and/or a DSM-IV mood disorder based on a NPE were included, and excluded if diagnosed with dementia or failure on performance validity tests. RESULTS: To examine whether a NPE with an interventional feedback session was associated with outcomes, changes from baseline to post-feedback session were examined with repeated-measures analysis of variance. Pearson correlations determined whether changes in hypothesized mechanisms (i.e., self-efficacy, goal importance and confidence ratings, and use of cognitive strategies) were related to changes in cognitive or psychiatric symptom severity. At follow-up, participants reported reductions in psychiatric (change in Brief Symptom Inventory depression: M = -2.8, SD = 4.4, range = -11 to 8, ${\eta}_p^2$=.30; anxiety: M = 3.2, SD = 6.6, range = -21 to 10, ${\eta}_p^2$ = .20) and cognitive symptoms (change in Multiple Ability Self-Report Questionnaire attention: M = -0.3, SD = 0.5, range = -1.6 to 0.5, ${\eta}_p^2$ = .31; verbal memory: M = -0.3, SD = 0.5, range = -1.1 to 0.5, ${\eta}_p^2$ = .24; language: M = -0.4, SD = 0.4, range = -1.3 to 0.4, ${\eta}_p^2$ = .48), and improved cognition (change in Meta-Memory Questionnaire ability: M = 4.4,SD = 6.2, range = -10 to 16, ${\eta}_p^2$ = .35; contentment: M = 4.3, SD = 4.5, range = -7 to 14, ${\eta}_p^2$ = .49). Participants reported increased self-efficacy for general and evaluation-specific goals. Increased goal-specific self-efficacy was associated with large reductions in psychiatric symptoms. CONCLUSIONS: Participants reported high levels of satisfaction with the NPE. Results support the clinical utility of NPE and feedback, and underscore the importance of individualized goal setting as part of the evaluation process.


Assuntos
Hospitais Comunitários , Satisfação Pessoal , Adulto , Ansiedade , Humanos , Testes Neuropsicológicos , Estudos Prospectivos
13.
Appl Neuropsychol Adult ; 24(4): 350-356, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-27267513

RESUMO

There is strong evidence that depression is associated with neuropsychological deficits across multiple domains. However, research on this topic has spanned a variety of measures with different psychometric properties and normative samples, which prevents drawing definitive conclusions about the pattern of neuropsychological deficiencies. The Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) is a brief neurocognitive battery that is routinely used in clinical settings and provides co-normed measures of attention, language, memory, and visuospatial/constructional skills. The present study examined the association between depression and RBANS performance in a sample of 66 18-65 year-old adults who completed a neuropsychological evaluation at an outpatient clinic. Results indicated that depressed participants, relative to controls, demonstrated poorer performance in immediate and delayed memory, attention, and visuospatial/constructional abilities, and the four domains were diminished to a similar degree. These results were replicated using a continuous measure of depression symptoms. In addition, the association between depression and delayed memory was at least partially due to current psychotropic medication. The present study suggests that the RBANS is sensitive to the neuropsychological deficits typically found in depression, such that mild to moderate depression in adult outpatients is associated with comparable deficits in attention, memory, and visuospatial/constructional abilities.


Assuntos
Depressão/diagnóstico , Testes Neuropsicológicos/estatística & dados numéricos , Adolescente , Adulto , Idoso , Atenção , Estudos de Casos e Controles , Feminino , Humanos , Masculino , Memória de Curto Prazo , Pessoa de Meia-Idade , Modelos Psicológicos , Adulto Jovem
14.
Int J Psychophysiol ; 114: 24-30, 2017 04.
Artigo em Inglês | MEDLINE | ID: mdl-28163133

RESUMO

Emotion-modulated startle is a frequently used method in affective science. Although there is a growing literature on the reliability of this measure, it is presently unclear how many startle responses are necessary to obtain a reliable signal. The present study therefore evaluated the reliability of startle responding as a function of number of startle responses (NoS) during a widely used threat-of-shock paradigm, the NPU-threat task, in a clinical (N=205) and non-clinical (N=92) sample. In the clinical sample, internal consistency was also examined independently for healthy controls vs. those with panic disorder and/or major depression and retest reliability was assessed as a function of NoS. Although results varied somewhat by diagnosis and for retest reliability, the overall pattern of results suggested that six startle responses per condition were necessary to obtain acceptable reliability in clinical and non-clinical samples during this threat-of-shock paradigm in the present study.


Assuntos
Piscadela/fisiologia , Transtorno Depressivo Maior/fisiopatologia , Transtorno de Pânico/fisiopatologia , Psicometria/normas , Psicofisiologia/normas , Reflexo de Sobressalto/fisiologia , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Psicometria/métodos , Psicofisiologia/métodos , Reprodutibilidade dos Testes , Adulto Jovem
15.
J Abnorm Psychol ; 125(5): 631-40, 2016 07.
Artigo em Inglês | MEDLINE | ID: mdl-27175986

RESUMO

Dysfunctional reward processing has long been considered an important feature of major depressive disorder (MDD). However, depression is a heterogeneous construct and the nature of this heterogeneity may contribute to some of the inconsistent empirical findings on reward dysfunction in MDD. The current study examined 1 source of heterogeneity, melancholic symptoms, and its association with reward processing. In individuals with MDD (N = 141) and MDD-free controls (N = 113), electroencephalogram (EEG) alpha asymmetry was measured during a behavioral reward task that probed reward anticipation. Melancholic depression was measured both categorically (Diagnostic and Statistical Manual of Mental Disorders [DSM] diagnosis) and dimensionally (Hamilton Endogenomorphy Scale [HES]). Results showed that a dimensional (and not categorical) definition of melancholia predicted reward processing, with higher melancholic symptoms predicting reduced reward anticipation. Importantly, the effects of melancholic symptoms on reduced reward anticipation remained above and beyond overall depression severity. These results suggest that dysfunctional reward processing may only be associated with melancholic symptoms, not depression in general. (PsycINFO Database Record


Assuntos
Antecipação Psicológica/fisiologia , Córtex Cerebral/fisiopatologia , Transtorno Depressivo/fisiopatologia , Transtorno Depressivo/psicologia , Recompensa , Adulto , Eletroencefalografia , Feminino , Humanos , Masculino
16.
Int J Psychophysiol ; 98(1): 87-94, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26168883

RESUMO

Heightened sensitivity to threat is a characteristic feature of panic disorder (PD). It is also a factor that is considered to be central to PD but not major depressive disorder (MDD) ­ a related disorder that commonly co-occurs with PD. However, sensitivity to threat is a broad construct and it is unclear whether individuals with PD exhibit heightened initial threat reactivity, impairments in modulating their threat responding over time, or both. It is also unclear how these different facets of threat responding apply to predictable and/or unpredictable threat. The aim of the current study was to examine whether there are differences in initial threat reactivity and the time course of threat responding during predictable and unpredictable threat-of-shock in 186 adults with: 1) current PD and no history of depression (i.e., PD-only), 2) current MDD and no history of an anxiety disorder (i.e., MDD-only), 3) current comorbid PD and MDD, or 4) no lifetime history of psychopathology (i.e., controls). Threat responding was assessed using an electromyography startle paradigm. Relative to controls, individuals in the three psychopathology groups exhibited heightened initial threat reactivity to predictable and unpredictable threat and did not differ from each other. Multilevel mixed model analyses indicated that those with PD evidenced less of a decline over time in startle responding during unpredictable threat relative to those without PD. Those with MDD displayed a greater slope of decline in startle responding during predictable threat compared with those without MDD. The pattern of results suggests that there may be conceptual differences between measures of initial threat reactivity and time course of threat responding. Moreover, time course of threat responding, not initial threat reactivity, may differentiate PD from MDD.


Assuntos
Transtorno Depressivo Maior/fisiopatologia , Transtorno Depressivo Maior/psicologia , Medo , Transtorno de Pânico/fisiopatologia , Transtorno de Pânico/psicologia , Reflexo de Sobressalto/fisiologia , Adulto , Distribuição de Qui-Quadrado , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Escalas de Graduação Psiquiátrica , Psicofísica , Fatores de Tempo , Adulto Jovem
18.
J Anxiety Disord ; 28(7): 731-6, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25173980

RESUMO

An inability to inhibit aversive responding during conditions that signal safety may be a core dysfunction associated with anxiety disorders. However, there has been inconsistent evidence as to whether individuals with panic disorder (PD) exhibit aversive responding during safety signals. It is therefore possible that only certain subgroups of PD patients, particularly those with high levels of intolerance of uncertainty (IU), evidence this type of abnormal responding. The aim of the current study was to examine whether IU moderates the association between PD and startle potentiation during (a) safety and (b) threat periods during a threat-of-shock task. Participants included 172 adults, 74 of which had current diagnoses of PD. Results indicated that at high levels of IU, PD was associated with greater startle potentiation during safety. At low levels of IU, PD was not associated with startle potentiation during safety. IU did not moderate the effect of PD on threat responding. These results suggest that PD patients with high levels of IU fail to inhibit aversive responding during safety, possibly due to a tendency to interpret distal threat as distressing.


Assuntos
Transtorno de Pânico/psicologia , Reflexo de Sobressalto , Segurança , Incerteza , Adulto , Ansiedade/psicologia , Estudos de Casos e Controles , Feminino , Humanos , Masculino , Autorrelato
19.
Emotion ; 14(3): 615-23, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24708496

RESUMO

Research has indicated that individuals of Asian descent, relative to other racial groups, demonstrate reduced emotional responding and lower prevalence rates of several anxiety disorders. It is unclear though whether these group differences extend to biomarkers of anxiety disorders and whether genetic differences play a role. This study compared self-identified Caucasian, Latino, and Asian persons (total N = 174) on startle response during a baseline period and while anticipating unpredictable threat-a putative biomarker for certain anxiety disorders--as well as predictable threat. In addition, the association between genetic ancestry and startle response was examined within each racial group to determine potential genetic influences on responding. For the baseline period, Asian participants exhibited a smaller startle response relative to Caucasian and Latino participants, who did not differ. Within each racial group, genetic ancestry was associated with baseline startle. Furthermore, genetic ancestry mediated racial group differences in baseline startle. For the threat conditions, a Race × Condition interaction indicated that Asian participants exhibited reduced startle potentiation to unpredictable, but not predicable, threat relative to Caucasian and Latino participants, who did not differ. However, genetic ancestry was not associated with threat-potentiated startle in any racial group. This study adds to the growing literature on racial differences in emotional responding and provides preliminary evidence suggesting that genetic ancestry may play an important role. Moreover, reduced sensitivity to unpredictable threat may reflect a mechanism for why individuals of Asian descent are at less risk for particular anxiety disorders relative to other racial groups.


Assuntos
Ansiedade/etnologia , Ansiedade/genética , Povo Asiático/genética , Reflexo de Sobressalto/genética , Adulto , Análise de Variância , Ansiedade/psicologia , Medo/fisiologia , Medo/psicologia , Feminino , Genótipo , Humanos , Masculino , Autorrelato , Adulto Jovem
20.
Biol Psychol ; 93(2): 334-41, 2013 May.
Artigo em Inglês | MEDLINE | ID: mdl-23528785

RESUMO

Evidence suggests that respiratory sinus arrhythmia (RSA) may be an important indicator of physiological flexibility. However, few studies have examined the relation between RSA and defensive habituation, a process contingent on physiological flexibility. In three independent samples, habituation was defined as the time course of 9 startle responses. In Sample one and two, startle was recorded (1) while shock electrodes were attached to participants' and (2) before a threat-of-shock task. In Sample three, startle was recorded without these two components. In the first two samples, startle magnitude significantly decreased over time but in Sample three, startle only decreased at a trend level. Further, low RSA was associated with less of a reduction in startle magnitude over time within the first two samples, but was unrelated to startle reduction in the third. This suggests that low RSA is associated with less habituation to contextual anxiety, which may reflect difficulties regulating anxiety.


Assuntos
Ansiedade/fisiopatologia , Ansiedade/psicologia , Arritmia Sinusal/fisiopatologia , Reflexo de Sobressalto/fisiologia , Adolescente , Análise de Variância , Eletrocardiografia , Eletroencefalografia , Eletrochoque/psicologia , Medo/fisiologia , Feminino , Habituação Psicofisiológica/fisiologia , Humanos , Masculino , Adulto Jovem
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