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1.
J Neurosci ; 40(15): 3089-3095, 2020 04 08.
Artigo em Inglês | MEDLINE | ID: mdl-32132264

RESUMO

A prominent theory claims that the right temporoparietal junction (rTPJ) is especially associated with embodied processes relevant to perspective-taking. In the present study, we use high-definition transcranial direct current stimulation to provide evidence that the rTPJ is causally associated with the embodied processes underpinning perspective-taking. Eighty-eight young human adults were stratified to receive either rTPJ or dorsomedial PFC anodal high-definition transcranial direct current stimulation in a sham-controlled, double-blind, repeated-measures design. Perspective-tracking (line-of-sight) and perspective-taking (embodied rotation) were assessed using a visuo-spatial perspective-taking task that required understanding what another person could see or how they see it, respectively. Embodied processing was manipulated by positioning the participant in a manner congruent or incongruent with the orientation of an avatar on the screen. As perspective-taking, but not perspective-tracking, is influenced by bodily position, this allows the investigation of the specific causal role for the rTPJ in embodied processing. Crucially, anodal stimulation to the rTPJ increased the effect of bodily position during perspective-taking, whereas no such effects were identified during perspective-tracking, thereby providing evidence for a causal role for the rTPJ in the embodied component of perspective-taking. Stimulation to the dorsomedial PFC had no effect on perspective-tracking or taking. Therefore, the present study provides support for theories postulating that the rTPJ is causally involved in embodied cognitive processing relevant to social functioning.SIGNIFICANCE STATEMENT The ability to understand another's perspective is a fundamental component of social functioning. Adopting another perspective is thought to involve both embodied and nonembodied processes. The present study used high-definition transcranial direct current stimulation (HD-tDCS) and provided causal evidence that the right temporoparietal junction is involved specifically in the embodied component of perspective-taking. Specifically, HD-tDCS to the right temporoparietal junction, but not another hub of the social brain (dorsomedial PFC), increased the effect of body position during perspective-taking, but not tracking. This is the first causal evidence that HD-tDCS can modulate social embodied processing in a site-specific and task-specific manner.


Assuntos
Lateralidade Funcional/fisiologia , Lobo Parietal/fisiologia , Lobo Temporal/fisiologia , Percepção Visual/fisiologia , Adolescente , Adulto , Cognição , Método Duplo-Cego , Feminino , Humanos , Masculino , Movimento/fisiologia , Desempenho Psicomotor/fisiologia , Percepção Social , Teoria da Mente/fisiologia , Estimulação Transcraniana por Corrente Contínua , Adulto Jovem
2.
Eur J Neurosci ; 2021 May 05.
Artigo em Inglês | MEDLINE | ID: mdl-33949008

RESUMO

BACKGROUND: Recent behavioural research has reported age-related changes in the costs of refocusing attention from a temporal (rapid serial visual presentation) to a spatial (visual search) task. Using magnetoencephalography, we have now compared the neural signatures of attention refocusing between three age groups (19-30, 40-49 and 60+ years) and found differences in task-related modulation and cortical localisation of alpha and theta oscillations. Efficient, faster refocusing in the youngest group compared to both middle age and older groups was reflected in parietal theta effects that were significantly reduced in the older groups. Residual parietal theta activity in older individuals was beneficial to attentional refocusing and could reflect preserved attention mechanisms. Slowed refocusing of attention, especially when a target required consolidation, in the older and middle-aged adults was accompanied by a posterior theta deficit and increased recruitment of frontal (middle-aged and older groups) and temporal (older group only) areas, demonstrating a posterior to anterior processing shift. Theta but not alpha modulation correlated with task performance, suggesting that older adults' stronger and more widely distributed alpha power modulation could reflect decreased neural precision or dedifferentiation but requires further investigation. Our results demonstrate that older adults present with different alpha and theta oscillatory signatures during attentional control, reflecting cognitive decline and, potentially, also different cognitive strategies in an attempt to compensate for decline.

3.
Psychol Sci ; 32(12): 1918-1936, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-34825598

RESUMO

Age-related decline in theory of mind (ToM) may be due to waning executive control, which is necessary for resolving conflict when reasoning about other individuals' mental states. We assessed how older (n = 50) and younger (n = 50) adults were affected by three theoretically relevant sources of conflict within ToM: competing self-other perspectives, competing cued locations, and outcome knowledge. We examined which best accounted for age-related difficulty with ToM. Our data show unexpected similarity between age groups when people are representing a belief incongruent with their own. Individual differences in attention and response speed best explained the degree of conflict experienced through incompatible self-other perspectives. However, older adults were disproportionately affected by managing conflict between cued locations. Age and spatial working memory were most relevant for predicting the magnitude of conflict elicited by conflicting cued locations. We suggest that previous studies may have underestimated older adults' ToM proficiency by including unnecessary conflict in ToM tasks.


Assuntos
Envelhecimento Saudável , Teoria da Mente , Idoso , Cognição/fisiologia , Função Executiva/fisiologia , Humanos , Memória de Curto Prazo , Testes Neuropsicológicos , Teoria da Mente/fisiologia
4.
Brain ; 142(10): 3294-3305, 2019 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-31410480

RESUMO

Autism spectrum disorder is increasingly associated with atypical perceptual and sensory symptoms. Here we explore the hypothesis that aberrant sensory processing in autism spectrum disorder could be linked to atypical intra- (local) and interregional (global) brain connectivity. To elucidate oscillatory dynamics and connectivity in the visual domain we used magnetoencephalography and a simple visual grating paradigm with a group of 18 adolescent autistic participants and 18 typically developing control subjects. Both groups showed similar increases in gamma (40-80 Hz) and decreases in alpha (8-13 Hz) frequency power in occipital cortex. However, systematic group differences emerged when analysing intra- and interregional connectivity in detail. First, directed connectivity was estimated using non-parametric Granger causality between visual areas V1 and V4. Feedforward V1-to-V4 connectivity, mediated by gamma oscillations, was equivalent between autism spectrum disorder and control groups, but importantly, feedback V4-to-V1 connectivity, mediated by alpha (8-13 Hz) oscillations, was significantly reduced in the autism spectrum disorder group. This reduction was positively correlated with autistic quotient scores, consistent with an atypical visual hierarchy in autism, characterized by reduced top-down modulation of visual input via alpha-band oscillations. Second, at the local level in V1, coupling of alpha-phase to gamma amplitude (alpha-gamma phase amplitude coupling) was reduced in the autism spectrum disorder group. This implies dysregulated local visual processing, with gamma oscillations decoupled from patterns of wider alpha-band phase synchrony (i.e. reduced phase amplitude coupling), possibly due to an excitation-inhibition imbalance. More generally, these results are in agreement with predictive coding accounts of neurotypical perception and indicate that visual processes in autism are less modulated by contextual feedback information.


Assuntos
Transtorno do Espectro Autista/fisiopatologia , Lobo Occipital/fisiologia , Percepção Visual/fisiologia , Adolescente , Ritmo alfa/fisiologia , Transtorno do Espectro Autista/metabolismo , Encéfalo/fisiologia , Conectoma/métodos , Eletroencefalografia/métodos , Feminino , Ritmo Gama/fisiologia , Substância Cinzenta/fisiologia , Humanos , Magnetoencefalografia/métodos , Masculino , Vias Neurais/fisiologia
5.
Neuroimage ; 199: 408-417, 2019 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-31173906

RESUMO

Virtual reality (VR) provides an immersive environment in which a participant can experience a feeling of presence in a virtual world. Such environments generate strong emotional and physical responses and have been used for wide-ranging applications. The ability to collect functional neuroimaging data whilst a participant is immersed in VR would represent a step change for experimental paradigms; unfortunately, traditional brain imaging requires participants to remain still, limiting the scope of naturalistic interaction within VR. Recently however, a new type of magnetoencephalography (MEG) device has been developed, that employs scalp-mounted optically-pumped magnetometers (OPMs) to measure brain electrophysiology. Lightweight OPMs, coupled with precise control of the background magnetic field, enables participant movement during data acquisition. Here, we exploit this technology to acquire MEG data whilst a participant uses a virtual reality head-mounted display (VRHMD). We show that, despite increased magnetic interference from the VRHMD, we were able to measure modulation of alpha-band oscillations, and the visual evoked field. Moreover, in a VR experiment in which a participant had to move their head to look around a virtual wall and view a visual stimulus, we showed that the measured MEG signals map spatially in accordance with the known organisation of primary visual cortex. This technique could transform the type of neuroscientific experiment that can be undertaken using functional neuroimaging.


Assuntos
Ritmo alfa/fisiologia , Córtex Cerebral/fisiologia , Potenciais Evocados Visuais/fisiologia , Magnetoencefalografia/métodos , Realidade Virtual , Adulto , Humanos , Magnetoencefalografia/instrumentação , Córtex Visual/fisiologia
6.
Conscious Cogn ; 63: 29-46, 2018 08.
Artigo em Inglês | MEDLINE | ID: mdl-29929064

RESUMO

Depersonalization and Derealization are characterised by feelings of detachment from one's bodily self/surroundings and a general emotional numbness. We explored predisposition to trait-based experiences of depersonalization/derealization-type experiences and autonomic arousal toward simulated body-threats, which were delivered to the participant's own body (i.e. Self) and when observed being delivered to another individual (i.e. Other). Ninety participants took part in an "Implied Body-Threat Illusion" task (Dewe, Watson, & Braithwaite, 2016) and autonomic arousal was recorded via standardised skin conductance responses and finger temperature. Autonomic suppression in response to threats delivered to the Self correlated with increases in trait-based depersonalization-type experiences. In contrast, autonomic suppression for threats delivered to Others correlated with trait-based derealization-like experiences. Body-temperature and anticipatory arousal did not correlate reliably with predisposition to depersonalization- or derealization-type experiences. The theoretical implications of these findings are discussed in terms of a fronto-limbic autonomic suppression mechanism.


Assuntos
Encéfalo/fisiopatologia , Estado de Consciência/fisiologia , Despersonalização/fisiopatologia , Resposta Galvânica da Pele/fisiologia , Adolescente , Adulto , Nível de Alerta , Temperatura Corporal/fisiologia , Medo/fisiologia , Medo/psicologia , Feminino , Dedos , Humanos , Masculino , Pessoa de Meia-Idade , Escalas de Graduação Psiquiátrica , Adulto Jovem
7.
Brain Topogr ; 30(5): 561-564, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28258363

RESUMO

Being able to imagine another person's experience and perspective of the world is a crucial human ability and recent reports suggest that humans "embody" another's viewpoint by mentally rotating their own body representation into the other's orientation. Our recent Magnetoencephalography (MEG) data further confirmed this notion of embodied perspective transformations and pinpointed the right posterior temporo-parietal junction (pTPJ) as the crucial hub in a distributed network oscillating at theta frequency (3-7 Hz). In a subsequent transcranial magnetic stimulation (TMS) experiment we interfered with right pTPJ processing and observed a modulation of the embodied aspects of perspective transformations. While these results corroborated the role of right pTPJ, the notion of theta oscillations being the crucial neural code remained a correlational observation based on our MEG data. In the current study we therefore set out to confirm the importance of theta oscillations directly by means of TMS entrainment. We compared entrainment of right pTPJ at 6 Hz vs. 10 Hz and confirmed that only 6 Hz entrainment facilitated embodied perspective transformations (at 160° angular disparity) while 10 Hz slowed it down. The reverse was true at low angular disparity (60° between egocentric and target perspective) where a perspective transformation was not strictly necessary. Our results further corroborate right pTPJ involvement in embodied perspective transformations and highlight theta oscillations as a crucial neural code.


Assuntos
Imaginação/fisiologia , Lobo Parietal/fisiologia , Lobo Temporal/fisiologia , Ritmo Teta/fisiologia , Adulto , Feminino , Lateralidade Funcional/fisiologia , Humanos , Magnetoencefalografia/métodos , Masculino , Tempo de Reação/fisiologia , Estimulação Magnética Transcraniana , Adulto Jovem
8.
Cereb Cortex ; 25(9): 3219-34, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24904076

RESUMO

Humans are especially good at taking another's perspective-representing what others might be thinking or experiencing. This "mentalizing" capacity is apparent in everyday human interactions and conversations. We investigated its neural basis using magnetoencephalography. We focused on whether mentalizing was engaged spontaneously and routinely to understand an utterance's meaning or largely on-demand, to restore "common ground" when expectations were violated. Participants conversed with 1 of 2 confederate speakers and established tacit agreements about objects' names. In a subsequent "test" phase, some of these agreements were violated by either the same or a different speaker. Our analysis of the neural processing of test phase utterances revealed recruitment of neural circuits associated with language (temporal cortex), episodic memory (e.g., medial temporal lobe), and mentalizing (temporo-parietal junction and ventromedial prefrontal cortex). Theta oscillations (3-7 Hz) were modulated most prominently, and we observed phase coupling between functionally distinct neural circuits. The episodic memory and language circuits were recruited in anticipation of upcoming referring expressions, suggesting that context-sensitive predictions were spontaneously generated. In contrast, the mentalizing areas were recruited on-demand, as a means for detecting and resolving perceived pragmatic anomalies, with little evidence they were activated to make partner-specific predictions about upcoming linguistic utterances.


Assuntos
Mapeamento Encefálico , Ondas Encefálicas/fisiologia , Encéfalo/fisiologia , Comunicação , Idioma , Teoria da Mente/fisiologia , Análise de Variância , Comportamento de Escolha , Potenciais Evocados/fisiologia , Feminino , Humanos , Magnetoencefalografia , Masculino , Estimulação Luminosa , Tempo de Reação , Estudantes , Universidades
9.
Cogn Neuropsychiatry ; 21(5): 412-428, 2016 09.
Artigo em Inglês | MEDLINE | ID: mdl-27684304

RESUMO

INTRODUCTION: Hallucinations that involve shifts in the subjectively experienced location of the self, have been termed "out-of-body experiences" (OBEs). Early psychiatric accounts cast OBEs as a specific instance of depersonalisation and derealisation disorder (DPD-DR). However, during feelings of alienation and lack of body realism in DPD-DR the self is experienced within the physical body. Deliberate forms of "disembodiment" enable humans to imagine another's visuo-spatial perspective taking (VPT), thus, if a strong relationship between deliberate and spontaneous forms of disembodiment could be revealed, then uncontrolled OBEs could be "the other side of the coin" of a uniquely human capacity. METHODS: We present a narrative review of behavioural and neuroimaging work emphasising methodological and theoretical aspects of OBE and VPT research and a potential relationship. RESULTS: Results regarding a direct behavioural relationship between VPT and OBE are mixed and we discuss reasons by pointing out the importance of using realistic tasks and recruiting genuine OBEers instead of general DPD-DR patients. Furthermore, we review neuroimaging evidence showing overlapping neural substrates between VPT and OBE, providing a strong argument for a relationship between the two processes. CONCLUSIONS: We conclude that OBE should be regarded as a necessary implication of VPT ability in humans, or even as a necessary and potentially sufficient condition for the evolution of VPT.


Assuntos
Imagem Corporal/psicologia , Despersonalização/psicologia , Alucinações/psicologia , Autoimagem , Alienação Social/psicologia , Despersonalização/diagnóstico por imagem , Emoções/fisiologia , Feminino , Alucinações/diagnóstico por imagem , Humanos , Imaginação/fisiologia , Masculino , Neuroimagem/métodos , Sensação/fisiologia
10.
Proc Biol Sci ; 281(1785): 20140388, 2014 Jun 22.
Artigo em Inglês | MEDLINE | ID: mdl-24807256

RESUMO

Being able to judge another person's visuo-spatial perspective is an essential social skill, hence we investigated the generalizability of the involved mechanisms across cultures and genders. Developmental, cross-species, and our own previous research suggest that two different forms of perspective taking can be distinguished, which are subserved by two distinct mechanisms. The simpler form relies on inferring another's line-of-sight, whereas the more complex form depends on embodied transformation into the other's orientation in form of a simulated body rotation. Our current results suggest that, in principle, the same basic mechanisms are employed by males and females in both, East-Asian (EA; Chinese) and Western culture. However, we also confirmed the hypothesis that Westerners show an egocentric bias, whereas EAs reveal an other-oriented bias. Furthermore, Westerners were slower overall than EAs and showed stronger gender differences in speed and depth of embodied processing. Our findings substantiate differences and communalities in social cognition mechanisms across genders and two cultures and suggest that cultural evolution or transmission should take gender as a modulating variable into account.


Assuntos
Cultura , Percepção Visual , Adulto , China , Feminino , Humanos , Masculino , Orientação , Escócia , Fatores Sexuais , Adulto Jovem
11.
Cognition ; 247: 105787, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38583320

RESUMO

What would a theory of visuospatial perspective taking (VSPT) look like? Here, ten researchers in the field, many with different theoretical viewpoints and empirical approaches, present their consensus on the three big questions we need to answer in order to bring this theory (or these theories) closer.

12.
eNeuro ; 2024 Jul 08.
Artigo em Inglês | MEDLINE | ID: mdl-38977304

RESUMO

We investigated the neural signatures of expert decision making in the context of police training in a virtual reality-based shoot/don't shoot scenario. Police officers can use stopping force against a perpetrator, which may require using a firearm and each decision made by an officer to discharge their firearm or not has substantial implications. Therefore it is important to understand the cognitive and underlying neurophysiological processes that lead to such a decision. We used virtual reality-based simulations to elicit ecologically valid behaviour from Authorised Firearms Officers (AFOs) in the UK and matched novices in a Shoot/Don't Shoot task and recorded electroencephalography concurrently. We found that AFOs had consistently faster response times than novices, suggesting our task was sensitive to their expertise. To investigate differences in decision making processes under varying levels of threat and expertise, we analysed electrophysiological signals originating from the anterior cingulate cortex. In line with similar response inhibition tasks, we found greater increases in pre-response theta power when participants inhibited the response to shoot when under no threat as compared to shooting. Most importantly, we showed that when preparing against threat, theta power increase was greater for experts than novices, suggesting that differences in performance between experts and novices are due to their greater orientation towards threat. Additionally, shorter beta-rebounds suggest that experts were "ready for action" sooner. More generally, we demonstrate that investigation of expert decision making should incorporate naturalistic stimuli and an appropriate control group to enhance validity.Significance statement This study aims to unravel the complexities of how expertise affects neural processes during uncertain scenarios by investigating police decision making. We present our variant on shoot/don't shoot tasks which was co-developed with police instructors to allow graded levels of force to elicit realistic responses. We show that experts exhibit superior performance in this virtual reality-based task and that this is associated with greater modulation of frontal midline theta activity prior to a decision. Understanding the intricacies of police decision making-especially concerning the use of firearms-is vital to inform policy effectively. Further, the naturalistic imaging methods employed here hold broader significance for neuroscientists aiming to investigate real world behaviour.

13.
Cognition ; 235: 105397, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-36871396

RESUMO

There is considerable conceptual overlap between Level-2 Visual Perspective Taking (VPT-2) and Belief Reasoning; both cognitive processes require us to represent another's viewpoint and experience of reality while inhibiting our own egocentric representations. This study investigated if these facets of mentalising are distinct from one another in the general adult population. To do so, we developed a novel "Seeing-Believing Task" with which to compare VPT-2 and true belief (TB) reasoning directly - one in which both judgement types refer to the same state of reality, requiring identical responses, and where self and other perspectives can be dissociated. Across three preregistered online experiments, this task demonstrated consistent differences between these two cognitive processes; specifically, TB judgements were associated with slower response times than VPT-2. This suggests that VPT-2 and TB reasoning are at least partly distinct psychological processes. Further, the greater cognitive effort required for TB reasoning is unlikely to be explained by differences in mnemonic processing. We suggest, therefore, that VPT-2 and TB reasoning differ in the complexity of social processing involved and we discuss theoretical implications based on minimal vs. full-blown Theory of Mind. Future research must attempt to test these conjectures.


Assuntos
Resolução de Problemas , Teoria da Mente , Adulto , Humanos , Julgamento/fisiologia , Memória , Tempo de Reação/fisiologia , Teoria da Mente/fisiologia
14.
Front Psychol ; 14: 1068229, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36844283

RESUMO

This proof-of-concept study provides an appraisal of a remotely administered gamified Stop-Signal Task (gSST) for future use in studies using child sample. Performance on the standard Stop-Signal (SST) task has been shown previously to differentiate attention-deficit-hyperactivity-disorder groups from controls. As is the case with the SST, it was envisaged that those with greater impulsivity would perform worse than those with lower levels of impulsivity in the gSST. The potential advantage of the gSST is that it could be perceived as less monotonous than the original SST and has the potential to provide higher data quality in child samples, however future research will need to be conducted to determine this. The gSST was administered remotely via video chat to 30 child participants within a community sample aged 8-12 to investigate the effect of ADHD symptoms and intrinsic motivation on gSST performance. Qualitative data was collected based on feedback from participants to gain insight into how the gSST was received by participants. A positive correlation was observed between impulsive/hyperactivity and gSST performance, however there was insufficient evidence to suggest that impulsivity predicted performance. With regards to accuracy, results suggested that impulsivity level significantly predicted the rate of go-omission errors. No relationships were observed between intrinsic motivation inventory (IMI) subscales and performance or IMI and impulsivity. Nevertheless, mean IMI scores were overarchingly high for each of the IMI subscales, suggesting that regardless of performance and/or level of impulsive behaviour, the child sample obtained in this study demonstrated high levels of intrinsic motivation, which was supported by the predominantly positive subjective feedback provided by the child participants. The present study provides some evidence based on quantitative and qualitative results for the efficacy of gSST for use with children. Future research with a larger sample of children is warranted to examine how performance on the SST and gSST compare/differ.

15.
J Psychopathol Clin Sci ; 132(4): 428-444, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-37141021

RESUMO

Despite extensive coverage of a relationship between memory performance and executive function in the obsessive-compulsive disorder (OCD) literature, the relative contributions of specific aspects of executive control have remained elusive. We, therefore, extend our previous multilevel meta-analysis (Persson et al., 2021), where demand on executive function was the most significant determinant of memory deficits in OCD, and provide a finer-grained analysis of executive control via a segregation into top-down (attentional control, maintenance and updating, planning) and bottom-up (perceptual integration, perceptual salience) contributions. Our multilevel meta-analytic approach allowed us to accommodate the interdependency of 255 effect sizes from 131 studies, totaling 4,101 OCD patients. Results revealed that maintenance and updating (top-down) and perceptual integration (bottom-up) predicted memory performance generally, and specifically in those with clinical OCD. Exploratory analyses suggested that this effect may be somewhat different among subclinical OCD groups; however, these findings should be considered with conceptual and analytical caveats in mind. We explain these results via deficient sensory (perceptual integration) and working memory (maintenance and updating) gating mechanisms and propose a model to accommodate their expression in OC symptoms. In conclusion, our meta-analysis has expanded understanding of cognitive performance in OCD and identifies the possibility of untapped cognitive targets for intervention. (PsycInfo Database Record (c) 2023 APA, all rights reserved).


Assuntos
Cognição , Transtorno Obsessivo-Compulsivo , Humanos , Testes Neuropsicológicos , Transtorno Obsessivo-Compulsivo/diagnóstico , Transtorno Obsessivo-Compulsivo/psicologia , Função Executiva , Memória de Curto Prazo
16.
Depress Anxiety ; 29(9): 807-15, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-22307939

RESUMO

BACKGROUND: Inhibition of return (IOR) is thought to reflect inhibition of previously attended but irrelevant stimuli. Deficient IOR would increase the likelihood of revisiting previously searched locations or objects, thus leading to unproductive perseverations. METHOD: Therefore, using a novel IOR task, we investigated whether high scoring checkers attentional biases to threat would result in dysfunctional inhibitory functioning compared to low checkers. In two tasks, we compared 53 subclinical high and 49 low checkers regarding IOR effects for stimuli that were concordant with the concerns of high but not of low checkers (electrical kitchen appliances: e.g., toaster, kettle). The difference between the two tasks was the cueing procedure. In one task, an appliance was switched "ON" and "OFF" as an unpredictive cue, drawing attention to the functionality of the stimulus. RESULTS: In this task, IOR was specifically attenuated in high checkers. In the other task, however, the cue was more abstract in form of a yellow outline that appeared around one of two appliances. Although the appliance was either "ON" or "OFF," this did not seem to matter and high checkers revealed a typical IOR pattern similar to low checkers. CONCLUSIONS: We conclude that IOR mechanisms might not be generally deficient in high checkers; rather only when attention is drawn to the threatening aspects of ecologically valid stimuli, then disengagement of attention is deficient in high checkers. We make suggestions on how our task-specific findings may inform cognitive interventions that target attentional control in the treatment of checking/obsessive-compulsive disorder.


Assuntos
Atenção , Inibição Psicológica , Comportamento Obsessivo/psicologia , Transtorno Obsessivo-Compulsivo/psicologia , Percepção Visual , Adulto , Análise de Variância , Feminino , Humanos , Masculino , Escalas de Graduação Psiquiátrica
17.
Psychol Aging ; 37(6): 731-741, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-35862129

RESUMO

Previous research has demonstrated that older adults make limited use of social cues as compared to younger adults. This has been investigated by testing the influence of gaze cues on attentional processes, with findings showing significantly smaller gaze-cuing effects for older than younger adults. Here, we aimed to investigate whether this would also result in age-related differences in the influence of gaze cues on working memory (WM). We therefore tested the effects of gaze cues from realistic human avatars on working memory across two experiments using dynamic head turns and more subtle eye gaze movements. We compared working memory for items looked at by the cue (congruent), looked away from by the cue (incongruent), and items shown when the cue looked down (neutral). Results demonstrated that for both older and younger adults, gaze cues influenced working memory processes, though there were some important differences related to the nature of the cue. When the cue made a dynamic head turn both younger and older adults showed an equivalent effect of gaze on attention. However, when only the eyes moved, while both the younger and older adults showed an effect of gaze on working memory, there appeared to be a difference in how the participants interpreted the neutral cue, with the older adults appearing to interpret the neutral cues in a similar way to the congruent cues. Overall, we provide important evidence that sharing attention benefits cognition across the life span. (PsycInfo Database Record (c) 2022 APA, all rights reserved).


Assuntos
Envelhecimento , Memória de Curto Prazo , Idoso , Atenção , Sinais (Psicologia) , Fixação Ocular , Humanos
18.
Data Brief ; 41: 107827, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35127998

RESUMO

This data article describes electroencephalography (EEG) and behavioral data from 47 participants. Data was collected using a 64 channel eego™ sports mobile EEG system during a visual working memory task presented in virtual reality (VR) using Unity with an Oculus Rift S head-mounted display. In the memory task, participants had to remember the status of and details about objects presented on a table. Prior to object appearance a moving, 3D social avatar or non-social stick cue was presented which pointed to the left or right of the table. Items for encoding could appear in the valid, cued location or the invalid, un-cued location, with the cue being uninformative to the task. The cue type was presented within subjects, blocked, counterbalanced. The data (behavioral & EEG (raw and processed)), scripts and the full task are available. The data is set up to allow investigation of neural signals during attention cueing, and memory encoding, maintenance and retrieval. The main novelty of the dataset is the presentation of the social avatar and non-social stick cue in VR within subjects, thus, allowing comparison across time points, including a period of eye contact. The data is also of interest to researchers interested in the neural corelates of working memory. Further, it is of interest to researchers interested in combining VR and EEG.

19.
Soc Cogn Affect Neurosci ; 17(6): 531-540, 2022 06 03.
Artigo em Inglês | MEDLINE | ID: mdl-34894148

RESUMO

In this preregistered study (https://osf.io/s4rm9) we investigated the behavioural and neurological [electroencephalography; alpha (attention) and theta (effort)] effects of dynamic non-predictive social and non-social cues on working memory. In a virtual environment realistic human-avatars dynamically looked to the left or right side of a table. A moving stick served as a non-social control cue. Kitchen items were presented in the valid cued or invalid un-cued location for encoding. Behavioural findings showed a similar influence of the cues on working memory performance. Alpha power changes were equivalent for the cues during cueing and encoding, reflecting similar attentional processing. However, theta power changes revealed different patterns for the cues. Theta power increased more strongly for the non-social cue compared to the social cue during initial cueing. Furthermore, while for the non-social cue there was a significantly larger increase in theta power for valid compared to invalid conditions during encoding, this was reversed for the social cue, with a significantly larger increase in theta power for the invalid compared to valid conditions, indicating differences in the cues' effects on cognitive effort. Therefore, while social and non-social attention cues impact working memory performance in a similar fashion, the underlying neural mechanisms appear to differ.


Assuntos
Sinais (Psicologia) , Realidade Virtual , Atenção , Eletroencefalografia , Humanos , Memória de Curto Prazo , Tempo de Reação
20.
Int J Psychophysiol ; 180: 49-59, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-35914547

RESUMO

Research into emotion regulation (ER) has focused primarily on the intra-personal process through which we regulate our own emotions intrinsically. More recently, however, studies have begun to explore the inter-personal nature of intrinsic ER - that is, how we regulate our emotions under the guidance of others. Preliminary evidence suggests that ER might be more effective when implemented in an inter- compared with an intra-personal manner, but these findings are based almost exclusively on self-reported ratings that capture only the subjective experience of emotions. The current study therefore investigated whether this apparent superiority of inter-personal intrinsic ER could be replicated and extended to physiological measures of affective reactions - namely, various metrics of electrodermal activity. In a within-subjects design, a sufficiently powered sample (N = 146) were required to down-regulate their emotional reactions to negatively valenced images using an ER strategy they had chosen themselves intra-personally or one that had been recommended to them inter-personally. Physiological responses converged to demonstrate the greater effectiveness of inter- over intra-personal ER in decreasing negative affective reactions, despite subjective ratings suggesting that participants perceived the opposite to be true. The superiority of inter- over intra-personal ER in physiological recordings was unrelated to individuals' perceptions of their ability to regulate their own emotions, however, and so it remains to be seen if and how such benefits extend to clinical populations.


Assuntos
Regulação Emocional , Emoções/fisiologia , Humanos
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