Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 35
Filtrar
Mais filtros

Base de dados
País/Região como assunto
Tipo de documento
País de afiliação
Intervalo de ano de publicação
1.
Psychol Sci ; 32(3): 326-339, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33539228

RESUMO

In this direct replication of Mueller and Oppenheimer's (2014) Study 1, participants watched a lecture while taking notes with a laptop (n = 74) or longhand (n = 68). After a brief distraction and without the opportunity to study, they took a quiz. As in the original study, laptop participants took notes containing more words spoken verbatim by the lecturer and more words overall than did longhand participants. However, laptop participants did not perform better than longhand participants on the quiz. Exploratory meta-analyses of eight similar studies echoed this pattern. In addition, in both the original study and our replication, higher word count was associated with better quiz performance, and higher verbatim overlap was associated with worse quiz performance, but the latter finding was not robust in our replication. Overall, results do not support the idea that longhand note taking improves immediate learning via better encoding of information.


Assuntos
Aprendizagem , Microcomputadores , Humanos
2.
Appetite ; 158: 105016, 2021 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-33152347

RESUMO

Emotional eating is defined as an increase in eating following negative emotion. Self-reported emotional eating has been associated with physical health concerns. However, experimental and daily diary studies indicate that induced or naturally experienced negative emotions do not reliably lead to increased eating behavior in people without eating disorders, not even among self-professed emotional eaters. Emotional eating may depend on associations people have made between specific emotions and eating. We describe a set of studies with the overarching goal of determining whether accounting for the variation in people's associations between eating and different discrete emotions is the key to observing emotional eating. In both Study 1 (N = 118) and 2 (N = 111), we asked people to report on their tendency to eat following sadness and anxiety and determined how much they ate when induced to feel sad or anxious in the lab (Study 1) or experiencing these emotions in daily life (Study 2). We found no support for our hypotheses in either study; self-professed sad- or anxious-eaters did not eat more when induced to experience these emotions in the lab, or when experiencing these emotions in daily life. Thus, accounting for the variation in people's associations between eating and two discrete emotions, sadness and anxiety, is not the key to observing sad or anxious eating behavior in the lab or in daily life. Preregistration, materials, data, and code: https://osf.io/kcqej/ (Study 1) and https://osf.io/3euvg/ (Study 2).


Assuntos
Emoções , Transtornos da Alimentação e da Ingestão de Alimentos , Ansiedade , Transtornos de Ansiedade , Comportamento Alimentar , Humanos
3.
Can J Physiol Pharmacol ; 96(2): 191-199, 2018 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-28977772

RESUMO

Caffeine reliably increases emotional arousal, but it is unclear whether and how it influences other dimensions of emotion such as emotional valence. These experiments documented whether caffeine influences emotion and emotion regulation choice and success. Low to abstinent caffeine consumers (maximum 100 mg/day) completed measures of state anxiety, positive and negative emotion, and salivary cortisol before, 45 min after, and 75 min after consuming 400 mg caffeine or placebo. Participants also completed an emotion regulation choice task, in which they chose to employ cognitive reappraisal or distraction in response to high and low intensity negative pictures (Experiment 1), or a cognitive reappraisal task, in which they employed cognitive reappraisal or no emotion regulation strategy in response to negative and neutral pictures (Experiment 2). State anxiety, negative emotion, and salivary cortisol were heightened both 45 and 75 min after caffeine intake relative to placebo. In Experiment 1, caffeine did not influence the frequency with which participants chose reappraisal or distraction, but reduced negativity of the picture ratings. In Experiment 2, caffeine did not influence cognitive reappraisal success. Thus, caffeine mitigated emotional responses to negative situations, but not how participants chose to regulate such responses or the success with which they did so.


Assuntos
Cafeína/farmacologia , Emoções/efeitos dos fármacos , Adulto , Ansiedade/psicologia , Humanos , Hidrocortisona/metabolismo , Placebos , Saliva/metabolismo , Inquéritos e Questionários , Análise e Desempenho de Tarefas , Adulto Jovem
4.
Exp Brain Res ; 235(12): 3785-3797, 2017 12.
Artigo em Inglês | MEDLINE | ID: mdl-28975416

RESUMO

Habitual exercise is associated with enhanced domain-general cognitive control, such as inhibitory control, selective attention, and working memory, all of which rely on the frontal cortex. However, whether regular exercise is associated with more specific aspects of cognitive control, such as the cognitive control of emotion, remains relatively unexplored. The present study employed a correlational design to determine whether level of habitual exercise was related to performance on the Stroop test measuring selective attention and response inhibition, the cognitive reappraisal task measuring cognitive reappraisal success, and associated changes in prefrontal cortex (PFC) oxygenation using functional near-infrared spectroscopy. 74 individuals (24 men, 50 women, age 18-32 years) participated. Higher habitual physical activity was associated with lower Stroop interference (indicating greater inhibitory control) and enhanced cognitive reappraisal success. Higher habitual exercise was also associated with lower oxygenated hemoglobin (O2Hb) in the PFC in response to emotional information. However, NIRS data indicated that exercise was not associated with cognitive control-associated O2Hb in the PFC. Behaviorally, the findings support and extend the previous findings that habitual exercise relates to more successful cognitive control of neutral information and cognitive reappraisal of emotional information. Future research should explore whether habitual exercise exerts causal benefits to cognitive control and PFC oxygenation, as well as isolate specific cognitive control processes sensitive to change through habitual exercise.


Assuntos
Mapeamento Encefálico , Cognição/fisiologia , Emoções/fisiologia , Exercício Físico/fisiologia , Habituação Psicofisiológica/fisiologia , Adolescente , Feminino , Hemoglobinas/metabolismo , Humanos , Masculino , Escalas de Graduação Psiquiátrica , Espectroscopia de Luz Próxima ao Infravermelho , Teste de Stroop , Inquéritos e Questionários , Adulto Jovem
5.
Pers Individ Dif ; 86: 455-464, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30555198

RESUMO

In emotion regulation (ER) research, participants are often trained to use specific strategies in response to emotionally evocative stimuli. Yet theoretical models suggest that people vary significantly in strategy use in everyday life. Which specific strategies people choose to use, and how many, may partially depend on contextual factors like the emotional intensity of the situation. It is thus possible - even likely - that participants spontaneously use uninstructed ER strategies in the laboratory, and that these uninstructed choices may depend on contextual factors like emotional intensity. We report data from four studies in which participants were instructed to use cognitive reappraisal to regulate their emotions in response to pictures, the emotional intensity of which varied across studies. After the picture trials, participants described which and how many strategies they used by way of open-ended responses. Results indicated that while a substantial proportion of participants in all studies described strategies consistent with cognitive reappraisal, a substantial proportion also endorsed uninstructed strategies. Importantly, they did so more often in the context of studies in which they viewed higher-intensity pictures. These findings underscore the importance of considering uninstructed ER choice in instructed paradigms and situational context in all studies of ER.

6.
Anxiety Stress Coping ; 36(5): 555-576, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-36625033

RESUMO

BACKGROUND AND OBJECTIVES: We examined the effects of ultra-brief training in mindfulness and cognitive reappraisal on affective response and performance under stress. We hypothesized that one or both types of training would decrease affective responding and improve performance, and that these effects might be moderated by acute stress induction. DESIGN: We manipulated training (mindfulness, cognitive reappraisal, control) between subjects and level of stress (low, high) within subjects in a 3 × 2 mixed factorial design. Method: Participants (N = 112, ages 18-35) completed two sessions on different days. In each session, they received mindfulness or cognitive reappraisal training or listened to a control script prior to a low- or high-stress simulated hostage situation. We measured motor performance efficiency (proportion of shots that hit hostile and hostage targets), affective responding (self-reported anxiety, salivary cortisol and alpha amylase, and autonomic physiology), and physical activity. RESULTS: Compared to control instructions, ultra-brief training in cognitive reappraisal or mindfulness reduced subjective anxiety and increased performance efficiency. There were few effects of training on other measures. CONCLUSION: Ultra-brief training in cognitive reappraisal or mindfulness prior to a stressful task may be both helpful and harmful; effects are preliminary and subject to boundary conditions.


Assuntos
Atenção Plena , Humanos , Ansiedade/terapia , Ansiedade/psicologia , Transtornos de Ansiedade , Autorrelato , Cognição/fisiologia
7.
Perspect Psychol Sci ; 17(6): 1800-1810, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-35867341

RESUMO

In a 2011 article in this journal entitled "Whites See Racism as a Zero-Sum Game That They Are Now Losing" (Perspectives on Psychological Science, 6, 215-218), Norton and Sommers assessed Black and White Americans' perceptions of anti-Black and anti-White bias across the previous 6 decades-from the 1950s to the 2000s. They presented two key findings: White (but not Black) respondents perceived decreases in anti-Black bias to be associated with increases in anti-White bias, signaling the perception that racism is a zero-sum game; White respondents rated anti-White bias as more pronounced than anti-Black bias in the 2000s, signaling the perception that they were losing the zero-sum game. We collected new data to examine whether the key findings would be evident nearly a decade later and whether political ideology would moderate perceptions. Liberal, moderate, and conservative White (but not Black) Americans alike believed that racism is a zero-sum game. Liberal White Americans saw racism as a zero-sum game they were winning by a lot, moderate White Americans saw it as a game they were winning by only a little, and conservative White Americans saw it as a game they were losing. This work has clear implications for public policy and behavioral science and lays the groundwork for future research that examines to what extent racial differences in perceptions of racism by political ideology are changing over time.


Assuntos
Racismo , Estados Unidos , Humanos , Racismo/psicologia , Negro ou Afro-Americano/psicologia , População Branca
8.
Cogn Emot ; 25(5): 765-81, 2011 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-21824019

RESUMO

One of the most fundamental distinctions in the field of emotion is the distinction between emotion generation and emotion regulation. This distinction fits comfortably with folk theories, which view emotions as passions that arise unbidden and then must be controlled. But is it really helpful to distinguish between emotion generation and emotion regulation? In this article, we begin by offering working definitions of emotion generation and emotion regulation. We argue that in some circumstances, the distinction between emotion generation and emotion regulation is indeed useful. We point both to citation patterns, which indicate that researchers from across a number of sub-areas within psychology are making this distinction, and to empirical studies, which indicate the utility of this distinction in many different research contexts. We then consider five ways in which the distinction between emotion generation and emotion regulation can be problematic. We suggest that it is time to move beyond debates about whether this distinction is useful to a more specific consideration of when and in what ways this distinction is useful, and in this spirit, we offer recommendations for future research.


Assuntos
Emoções , Terminologia como Assunto , Humanos , Modelos Psicológicos , Teoria Psicológica
9.
Anxiety Stress Coping ; 34(4): 365-380, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-33650444

RESUMO

BACKGROUND AND OBJECTIVES: Animal-assisted interventions (AAIs) are increasingly popular as treatments to reduce anxiety. However, there is little empirical evidence testing the mechanisms of action in AAIs, especially among adolescents. We examined whether two possible mechanisms, social interaction and/or physical contact with a therapy dog, might reduce anxiety during a social stressor. DESIGN AND METHODS: To test these mechanisms, we randomly assigned 75 adolescents with low, middle, and high levels of social anxiety to complete a laboratory-based social evaluative stressor in one of three conditions: social interaction with a therapy dog (no physical interaction), social plus physical interaction with a therapy dog, or no interaction with a therapy dog. We measured self-reported anxiety and autonomic reactivity during the social stressor to assess the effects of contact with a therapy dog. RESULTS AND CONCLUSIONS: We found no evidence that the presence of a real dog, with or without the opportunity to touch it, reduced anxiety or autonomic reactivity or improved cognitive performance relative to the presence of a stuffed dog in the control condition, regardless of levels of preexisting social anxiety.Trial registration: ClinicalTrials.gov identifier: NCT03249116.


Assuntos
Laboratórios , Animais de Terapia , Adolescente , Animais , Ansiedade , Transtornos de Ansiedade , Cães , Medo , Humanos
10.
Neuroimage ; 47(3): 852-63, 2009 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-19486944

RESUMO

The present study investigated the premise that individual differences in autonomic physiology could be used to specify the nature and consequences of information processing taking place in medial prefrontal regions during cognitive reappraisal of unpleasant pictures. Neural (blood oxygenation level-dependent functional magnetic resonance imaging) and autonomic (electrodermal [EDA], pupil diameter, cardiac acceleration) signals were recorded simultaneously as twenty-six older people (ages 64-66 years) used reappraisal to increase, maintain, or decrease their responses to unpleasant pictures. EDA was higher when increasing and lower when decreasing compared to maintaining. This suggested modulation of emotional arousal by reappraisal. By contrast, pupil diameter and cardiac acceleration were higher when increasing and decreasing compared to maintaining. This suggested modulation of cognitive demand. Importantly, reappraisal-related activation (increase, decrease>maintain) in two medial prefrontal regions (dorsal medial frontal gyrus and dorsal cingulate gyrus) was correlated with greater cardiac acceleration (increase, decrease>maintain) and monotonic changes in EDA (increase>maintain>decrease). These data indicate that these two medial prefrontal regions are involved in the allocation of cognitive resources to regulate unpleasant emotion, and that they modulate emotional arousal in accordance with the regulatory goal. The emotional arousal effects were mediated by the right amygdala. Reappraisal-related activation in a third medial prefrontal region (subgenual anterior cingulate cortex) was not associated with similar patterns of change in any of the autonomic measures, thus highlighting regional specificity in the degree to which cognitive demand is reflected in medial prefrontal activation during reappraisal.


Assuntos
Sistema Nervoso Autônomo/fisiologia , Mapeamento Encefálico , Cognição/fisiologia , Emoções/fisiologia , Individualidade , Córtex Pré-Frontal/fisiologia , Idoso , Nível de Alerta/fisiologia , Feminino , Humanos , Interpretação de Imagem Assistida por Computador , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade
11.
J Neurosci ; 27(33): 8877-84, 2007 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-17699669

RESUMO

Although depressed mood is a normal occurrence in response to adversity in all individuals, what distinguishes those who are vulnerable to major depressive disorder (MDD) is their inability to effectively regulate negative mood when it arises. Investigating the neural underpinnings of adaptive emotion regulation and the extent to which such processes are compromised in MDD may be helpful in understanding the pathophysiology of depression. We report results from a functional magnetic resonance imaging study demonstrating left-lateralized activation in the prefrontal cortex (PFC) when downregulating negative affect in nondepressed individuals, whereas depressed individuals showed bilateral PFC activation. Furthermore, during an effortful affective reappraisal task, nondepressed individuals showed an inverse relationship between activation in left ventrolateral PFC and the amygdala that is mediated by the ventromedial PFC (VMPFC). No such relationship was found for depressed individuals, who instead show a positive association between VMPFC and amygdala. Pupil dilation data suggest that those depressed patients who expend more effort to reappraise negative stimuli are characterized by accentuated activation in the amygdala, insula, and thalamus, whereas nondepressed individuals exhibit the opposite pattern. These findings indicate that a key feature underlying the pathophysiology of major depression is the counterproductive engagement of right prefrontal cortex and the lack of engagement of left lateral-ventromedial prefrontal circuitry important for the downregulation of amygdala responses to negative stimuli.


Assuntos
Tonsila do Cerebelo/fisiopatologia , Transtorno Depressivo Maior/patologia , Transtorno Depressivo Maior/fisiopatologia , Emoções/fisiologia , Vias Neurais/fisiopatologia , Córtex Pré-Frontal/fisiopatologia , Adulto , Tonsila do Cerebelo/irrigação sanguínea , Nível de Alerta/fisiologia , Atenção/fisiologia , Mapeamento Encefálico , Estudos de Casos e Controles , Feminino , Lateralidade Funcional/fisiologia , Humanos , Processamento de Imagem Assistida por Computador/métodos , Imageamento por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade , Rede Nervosa/irrigação sanguínea , Rede Nervosa/fisiopatologia , Vias Neurais/irrigação sanguínea , Oxigênio/sangue , Estimulação Luminosa/métodos , Córtex Pré-Frontal/irrigação sanguínea , Pupila/fisiologia
12.
Sci Rep ; 8(1): 5411, 2018 04 03.
Artigo em Inglês | MEDLINE | ID: mdl-29615681

RESUMO

We conducted two within-subjects experiments to determine whether people use alternative emotion regulation (ER) strategies to compensate for failure of situation selection, a form of ER in which one chooses situations based on the emotions those situations afford. Participants viewed negative and neutral (Study 1, N = 58) or negative, neutral, and positive pictures (Study 2, N = 90). They indicated for each picture whether they wanted to terminate presentation (Study 1) or view it again (Study 2). We manipulated the outcome of this decision to be congruent with participants' wishes (success) or not (failure), and measured self-reported ER strategies and emotional responses. Although participants terminated negative situations more often than neutral situations (Study 1), or chose to view positive pictures more frequently than neutral, and neutral more frequently than negative (Study 2), there was little evidence of compensation in the wake of situation selection failure. Overall, we conclude that although people choose situations based on affect (i.e., attempt to end or avoid high-arousal negative situations and pursue high-arousal pleasant ones), they do not generally use the alternative ER strategies that we assessed (rumination, reappraisal, distraction) to compensate when the situations they select fail to materialize in this experimental context.


Assuntos
Emoções , Adolescente , Emoções/fisiologia , Feminino , Frequência Cardíaca , Humanos , Masculino , Adulto Jovem
13.
Front Hum Neurosci ; 12: 398, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30459576

RESUMO

Acute exercise consistently benefits both emotion and cognition, particularly cognitive control. We evaluated acute endurance exercise influences on emotion, domain-general cognitive control and the cognitive control of emotion, specifically cognitive reappraisal. Thirty-six endurance runners, defined as running at least 30 miles per week with one weekly run of at least 9 miles (21 female, age 18-30 years) participated. In a repeated measures design, participants walked at 57% age-adjusted maximum heart rate (HRmax; range 51%-63%) and ran at 70% HRmax (range 64%-76%) for 90 min on two separate days. Participants completed measures of emotional state and the Stroop test of domain-general cognitive control before, every 30 min during and 30 min after exercise. Participants also completed a cognitive reappraisal task (CRT) after exercise. Functional near-infrared spectroscopy (fNIRS) tracked changes in oxygenated and deoxygenated hemoglobin (O2Hb and dHb) levels in the prefrontal cortex (PFC). Results suggest that even at relatively moderate intensities, endurance athletes benefit emotionally from running both during and after exercise and task-related PFC oxygenation reductions do not appear to hinder prefrontal-dependent cognitive control.

14.
Adv Methods Pract Psychol Sci ; 1(4): 501-515, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31886452

RESUMO

Concerns have been growing about the veracity of psychological research. Many findings in psychological science are based on studies with insufficient statistical power and nonrepresentative samples, or may otherwise be limited to specific, ungeneralizable settings or populations. Crowdsourced research, a type of large-scale collaboration in which one or more research projects are conducted across multiple lab sites, offers a pragmatic solution to these and other current methodological challenges. The Psychological Science Accelerator (PSA) is a distributed network of laboratories designed to enable and support crowdsourced research projects. These projects can focus on novel research questions, or attempt to replicate prior research, in large, diverse samples. The PSA's mission is to accelerate the accumulation of reliable and generalizable evidence in psychological science. Here, we describe the background, structure, principles, procedures, benefits, and challenges of the PSA. In contrast to other crowdsourced research networks, the PSA is ongoing (as opposed to time-limited), efficient (in terms of re-using structures and principles for different projects), decentralized, diverse (in terms of participants and researchers), and inclusive (of proposals, contributions, and other relevant input from anyone inside or outside of the network). The PSA and other approaches to crowdsourced psychological science will advance our understanding of mental processes and behaviors by enabling rigorous research and systematically examining its generalizability.

15.
J Neurosci ; 26(16): 4415-25, 2006 Apr 19.
Artigo em Inglês | MEDLINE | ID: mdl-16624961

RESUMO

Among younger adults, the ability to willfully regulate negative affect, enabling effective responses to stressful experiences, engages regions of prefrontal cortex (PFC) and the amygdala. Because regions of PFC and the amygdala are known to influence the hypothalamic-pituitary-adrenal axis, here we test whether PFC and amygdala responses during emotion regulation predict the diurnal pattern of salivary cortisol secretion. We also test whether PFC and amygdala regions are engaged during emotion regulation in older (62- to 64-year-old) rather than younger individuals. We measured brain activity using functional magnetic resonance imaging as participants regulated (increased or decreased) their affective responses or attended to negative picture stimuli. We also collected saliva samples for 1 week at home for cortisol assay. Consistent with previous work in younger samples, increasing negative affect resulted in ventral lateral, dorsolateral, and dorsomedial regions of PFC and amygdala activation. In contrast to previous work, decreasing negative affect did not produce the predicted robust pattern of higher PFC and lower amygdala activation. Individuals demonstrating the predicted effect (decrease < attend in the amygdala), however, exhibited higher signal in ventromedial prefrontal cortex (VMPFC) for the same contrast. Furthermore, participants displaying higher VMPFC and lower amygdala signal when decreasing compared with the attention control condition evidenced steeper, more normative declines in cortisol over the course of the day. Individual differences yielded the predicted link between brain function while reducing negative affect in the laboratory and diurnal regulation of endocrine activity in the home environment.


Assuntos
Tonsila do Cerebelo/metabolismo , Ritmo Circadiano/fisiologia , Emoções/fisiologia , Hidrocortisona/metabolismo , Córtex Pré-Frontal/metabolismo , Fatores Etários , Envelhecimento/fisiologia , Envelhecimento/psicologia , Feminino , Humanos , Estudos Longitudinais , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes
16.
Psychosom Med ; 69(7): 682-91, 2007.
Artigo em Inglês | MEDLINE | ID: mdl-17766692

RESUMO

OBJECTIVE: To test the hypothesis that socioeconomic status (SES) would be associated with sleep quality measured objectively, even after controlling for related covariates (health status, psychosocial characteristics). Epidemiological studies linking SES and sleep quality have traditionally relied on self-reported assessments of sleep. METHODS: Ninety-four women, 61 to 90 years of age, participated in this study. SES was determined by pretax household income and years of education. Objective and subjective assessments of sleep quality were obtained using the NightCap sleep system and the Pittsburgh Sleep Quality Index (PSQI), respectively. Health status was determined by subjective health ratings and objective measures of recent and chronic illnesses. Depressive symptoms and neuroticism were quantified using the Center for Epidemiological Studies Depression Scale and the Neuroticism subscale of the NEO Personality Inventory, respectively. RESULTS: Household income significantly predicted sleep latency and sleep efficiency even after adjusting for demographic factors, health status, and psychosocial characteristics. Income also predicted PSQI scores, although this association was significantly attenuated by inclusion of neuroticism in multivariate analyses. Education predicted both sleep latency and sleep efficiency, but the latter association was partially reduced after health status and psychosocial measures were included in analyses. Education predicted PSQI sleep efficiency component scores, but not global scores. CONCLUSIONS: These results suggest that SES is robustly linked to both subjective and objective sleep quality, and that health status and psychosocial characteristics partially explain these associations.


Assuntos
Envelhecimento/psicologia , Transtornos do Sono-Vigília/economia , Transtornos do Sono-Vigília/psicologia , Classe Social , Idoso , Idoso de 80 Anos ou mais , Estudos de Coortes , Feminino , Nível de Saúde , Humanos , Saúde Mental , Pessoa de Meia-Idade , Inventário de Personalidade , Escalas de Graduação Psiquiátrica , Transtornos do Sono-Vigília/epidemiologia
17.
Biol Psychol ; 122: 59-68, 2017 01.
Artigo em Inglês | MEDLINE | ID: mdl-26711301

RESUMO

Low attentional control (AC) and high anxiety are closely linked. Researchers often presume that high anxiety reduces AC; however, the reverse causal possibility - that low AC increases anxiety - is equally plausible. We addressed this question in people with elevated trait anxiety by evaluating the temporal precedence of the AC-anxiety association. We tested whether autonomic arousal (electrodermal activity) and subjective anxiety elicited by an anxiety induction were associated more strongly with AC measured either pre-induction (N=40) or post-induction (N=38). Low AC was indexed by distractibility during a visual search task requiring attentional inhibition of emotionally neutral distractors. Higher distractibility predicted higher autonomic activation but not higher increases in self-reported anxiety. Critically, this AC-anxiety association occurred for pre-induction but not post-induction AC. The results suggest that low AC may heighten subsequent anxious arousal. By implication, treatment interventions should specifically enhance AC to alleviate anxiety.


Assuntos
Transtornos de Ansiedade/fisiopatologia , Transtornos de Ansiedade/psicologia , Nível de Alerta/fisiologia , Atenção/fisiologia , Viés de Atenção/fisiologia , Sistema Nervoso Autônomo/fisiopatologia , Adolescente , Adulto , Emoções/fisiologia , Feminino , Resposta Galvânica da Pele/fisiologia , Humanos , Inibição Psicológica , Masculino , Pessoa de Meia-Idade , Reconhecimento Visual de Modelos/fisiologia , Adulto Jovem
18.
Artigo em Inglês | MEDLINE | ID: mdl-27676220

RESUMO

Age-related differences in memory monitoring appear when people learn emotional words. Namely, younger adults' judgments of learning (JOLs) are higher for positive than neutral words, whereas older adults' JOLs do not discriminate between positive versus neutral words. In two experiments, we evaluated whether this age-related difference extends to learning positive versus neutral pictures. We also evaluated the contribution of two dimensions of emotion that may impact younger and older adults' JOLs: valence and arousal. Younger and older adults studied pictures that were positive or neutral and either high or low in arousal. Participants made immediate JOLs and completed memory tests. In both experiments, the magnitude of older adults' JOLs was influenced by emotion, and both younger and older adults demonstrated an emotional salience effect on JOLs. As important, the magnitude of participants' JOLs was influenced by valence, and not arousal. Emotional salience effects were also evident on participants' free recall, and older adults recalled as many pictures as did younger adults. Taken together, these data suggest that older adults do not have a monitoring deficit when learning positive (vs. neutral) pictures and that emotional salience effects on younger and older adults' JOLs are produced more by valence than by arousal.


Assuntos
Envelhecimento/psicologia , Emoções , Julgamento , Aprendizagem , Reconhecimento Visual de Modelos , Idoso , Análise de Variância , Nível de Alerta , Feminino , Humanos , Masculino , Rememoração Mental , Testes Neuropsicológicos , Adulto Jovem
19.
Front Psychol ; 8: 1366, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28912736

RESUMO

Robots intended for social contexts are often designed with explicit humanlike attributes in order to facilitate their reception by (and communication with) people. However, observation of an "uncanny valley"-a phenomenon in which highly humanlike entities provoke aversion in human observers-has lead some to caution against this practice. Both of these contrasting perspectives on the anthropomorphic design of social robots find some support in empirical investigations to date. Yet, owing to outstanding empirical limitations and theoretical disputes, the uncanny valley and its implications for human-robot interaction remains poorly understood. We thus explored the relationship between human similarity and people's aversion toward humanlike robots via manipulation of the agents' appearances. To that end, we employed a picture-viewing task (Nagents = 60) to conduct an experimental test (Nparticipants = 72) of the uncanny valley's existence and the visual features that cause certain humanlike robots to be unnerving. Across the levels of human similarity, we further manipulated agent appearance on two dimensions, typicality (prototypic, atypical, and ambiguous) and agent identity (robot, person), and measured participants' aversion using both subjective and behavioral indices. Our findings were as follows: (1) Further substantiating its existence, the data show a clear and consistent uncanny valley in the current design space of humanoid robots. (2) Both category ambiguity, and more so, atypicalities provoke aversive responding, thus shedding light on the visual factors that drive people's discomfort. (3) Use of the Negative Attitudes toward Robots Scale did not reveal any significant relationships between people's pre-existing attitudes toward humanlike robots and their aversive responding-suggesting positive exposure and/or additional experience with robots is unlikely to affect the occurrence of an uncanny valley effect in humanoid robotics. This work furthers our understanding of both the uncanny valley, as well as the visual factors that contribute to an agent's uncanniness.

20.
Pharmacol Biochem Behav ; 132: 10-19, 2015 05.
Artigo em Inglês | MEDLINE | ID: mdl-25732379

RESUMO

Omega-3 fatty acid (n-3 PUFA) intake is associated with improved mood and cognition, but randomized controlled trials addressing the causal nature of such relationships are less clear, especially in healthy, young adults. Stress is one potential mechanism by which n-3 PUFAs may influence mood. Thus the present aim is to evaluate the influence of n-3 PUFA supplementation on stress-induced changes to mood, cognition, and physiological stress markers in healthy, young adults. Using a double-blind, placebo-controlled design, 72 young adults were randomized to receive 2800mg/day fish oil (n=36, 23 females) or olive oil control (n=36, 22 females) for 35days. Subjects completed measures of mood and cognition before supplementation, and two times after supplementation: following an acute stressor or non-stressful control task. The stress induction was effective in that the stressor impaired mood, including augmenting feelings of tension, anger, confusion and anxiety, reduced accuracy on a cognitive task measuring attentional control and the ability to regulate emotion, and increased salivary cortisol and pro-inflammatory cytokine interleukin-1ß (IL-1ß). Rated anger and confusion increased with stress in the olive oil group, but remained stable in the fish oil group. However, fish oil had no further effects on mood, cognitive function, cortisol, or IL-1ß. Fish oil exerted few effects in stressful and non-stressful situations, consistent with findings showing little influence of n-3 PUFA supplementation on mood and cognition in young, healthy individuals. Potential target populations who would more likely benefit from increased n-3 PUFA intake are discussed.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA