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1.
J Exp Psychol Hum Percept Perform ; 48(4): 289-311, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35298229

RESUMO

Humans spontaneously attend to faces and eyes. Recent findings, however, suggest that this social attentional biasing may not be driven by the social value of faces but by general factors, like stimulus content, visual context, or task settings. Here, we investigated whether the stimulus content factors of global luminance, featural configuration, and perceived attractiveness may independently drive social attentional biasing. Six experiments were run. In each, participants completed a dot-probe task where the presentation of a face, a house, and two neutral images was followed by the presentation of a response target at one of those locations. Experiments 1 and 2 assessed social attentional biasing when the face had higher overall global luminance. Experiments 3 and 4 assessed social attentional biasing when the face (but not the comparison house) retained the typical canonical configuration of internal features. Experiments 5 and 6 examined social attentional biasing when the face was more attractive than the house. Experiments 1, 3, and 5 measured manual responses when participants were instructed to maintain fixation. Experiments 2, 4, and 6 measured both manual and oculomotor responses when no instructions about eye movements were provided. The results indicated no reliable social attentional biasing in Experiments 1 to 5, however, a reliable saccadic bias toward the eyes of attractive upright faces was found in Experiment 6. Together, these results show that perceived facial attractiveness may be an important general factor in social attentional biasing. (PsycInfo Database Record (c) 2022 APA, all rights reserved).


Assuntos
Viés de Atenção , Atenção/fisiologia , Viés de Atenção/fisiologia , Movimentos Oculares , Humanos
2.
Atten Percept Psychophys ; 84(3): 829-842, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35084707

RESUMO

Although attention is thought to be spontaneously biased by social cues like faces and eyes, recent data have demonstrated that when extraneous content, context, and task factors are controlled, attentional biasing is abolished in manual responses while still occurring sparingly in oculomotor measures. Here, we investigated how social attentional biasing was affected by face novelty by measuring responses to frequently presented (i.e., those with lower novelty) and infrequently presented (i.e., those with higher novelty) face identities. Using a dot-probe task, participants viewed either the same face and house identity that was frequently presented on half of the trials or sixteen different face and house identities that were infrequently presented on the other half of the trials. A response target occurred with equal probability at the previous location of the eyes or mouth of the face or the top or bottom of the house. Experiment 1 measured manual responses to the target while participants maintained central fixation. Experiment 2 additionally measured participants' natural oculomotor behaviour when their eye movements were not restricted. Across both experiments, no evidence of social attentional biasing was found in manual data. However, in Experiment 2, there was a reliable oculomotor bias towards the eyes of infrequently presented upright faces. Together, these findings suggest that face novelty does not facilitate manual measures of social attention, but it appears to promote spontaneous oculomotor biasing towards the eyes of infrequently presented novel faces.


Assuntos
Viés de Atenção , Movimentos Oculares , Atenção/fisiologia , Viés de Atenção/fisiologia , Sinais (Psicologia) , Face , Humanos
3.
J Autism Dev Disord ; 52(9): 4007-4021, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34524587

RESUMO

Decreased sound tolerance (DST) is the most common sensory difficulty experienced by autistic individuals. Parents of 88 autistic children and young adults between the ages of 3 and 30 described coping strategies and physical and emotional responses used to deal with distressing sounds, and their impact on daily activities. Loud, sudden, and high-pitched sounds were most commonly endorsed as distressing, most often causing autistic children and young adults to cover their ears or yell, while producing stress, irritation, fear, and anxiety. Parents reported warning their child, providing breaks, or avoiding noisy settings as the most used coping strategies. Overall, findings indicate that DST leads to fewer opportunities for autistic children and young adults to participate at home, at school, and in the community. Further, results suggest hyperacusis, misophonia, and phonophobia, subtypes of DST, are present in autistic children and young adults.


Assuntos
Transtorno do Espectro Autista , Adolescente , Adulto , Ansiedade , Transtornos de Ansiedade/psicologia , Criança , Pré-Escolar , Emoções , Humanos , Hiperacusia , Adulto Jovem
4.
PLoS One ; 16(6): e0250763, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34143788

RESUMO

This study examined involuntary capture of attention, overt attention, and stimulus valence and arousal ratings, all factors that can contribute to potential attentional biases to face and train objects in children with and without autism spectrum disorder (ASD). In the visual domain, faces are particularly captivating, and are thought to have a 'special status' in the attentional system. Research suggests that similar attentional biases may exist for other objects of expertise (e.g. birds for bird experts), providing support for the role of exposure in attention prioritization. Autistic individuals often have circumscribed interests around certain classes of objects, such as trains, that are related to vehicles and mechanical systems. This research aimed to determine whether this propensity in autistic individuals leads to stronger attention capture by trains, and perhaps weaker attention capture by faces, than what would be expected in non-autistic children. In Experiment 1, autistic children (6-14 years old) and age- and IQ-matched non-autistic children performed a visual search task where they manually indicated whether a target butterfly appeared amongst an array of face, train, and neutral distractors while their eye-movements were tracked. Autistic children were no less susceptible to attention capture by faces than non-autistic children. Overall, for both groups, trains captured attention more strongly than face stimuli and, trains had a larger effect on overt attention to the target stimuli, relative to face distractors. In Experiment 2, a new group of children (autistic and non-autistic) rated train stimuli as more interesting and exciting than the face stimuli, with no differences between groups. These results suggest that: (1) other objects (trains) can capture attention in a similar manner as faces, in both autistic and non-autistic children (2) attention capture is driven partly by voluntary attentional processes related to personal interest or affective responses to the stimuli.


Assuntos
Atenção/fisiologia , Transtorno do Espectro Autista/fisiopatologia , Movimentos Oculares/fisiologia , Reconhecimento Facial/fisiologia , Percepção Visual/fisiologia , Adolescente , Estudos de Casos e Controles , Criança , Feminino , Humanos , Masculino , Tempo de Reação
5.
Dev Psychopathol ; 33(1): 65-75, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-31896382

RESUMO

"Joint action"-the ability to coordinate actions with others-is critical for achieving individual and interpersonal goals and for our collective success as a species. Joint actions require accurate and rapid inferences about others' goals, intentions, and focus of attention, skills that are thought to be impaired in individuals with autism spectrum disorder (ASD). Research to date has not investigated joint action abilities in individuals with ASD during real-world social interactions. We conducted an experimental study that required children with ASD and typically developing children to move tables by themselves or collaboratively through a maze. This involved developing innovative methodologies for measuring action coordination-a critical component of the joint action process. We found that children with ASD are less likely to benefit from the collaboration of a peer than are typically developing children, and they are less likely to synchronize their steps when moving the table. However, these differences were masked when scaffolded by an adult. There was no evidence that ASD differences were due to gross motor delays in the participants with ASD. We argue that action coordination is a highly adaptive social process that is intrinsic to successful human functioning that manifests as atypical synchronization of mind and body in children with ASD.


Assuntos
Transtorno do Espectro Autista , Atenção , Criança , Humanos
6.
Autism Adulthood ; 3(2): 187-194, 2021 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-36601466

RESUMO

The number of autistic students in colleges is growing rapidly. However, their needs are not being met, and graduation rates among this population remain low. This article describes the implementation and evaluation of the Autism Mentorship Initiative (AMI) for autistic undergraduates (mentees), who received 1-on-1 support from upper-level undergraduate or graduate students (mentors) at their university. We examined changes in college adjustment (n = 16) and grade point average among mentees (n = 19) before and after participation in AMI for two or more semesters. We also examined surveys completed by both mentees (n = 16) and mentors (n = 21) evaluating their experiences in AMI. Data from the Student Adaptation to College Questionnaire showed that mentees displayed lower than average social, emotional, and academic adjustment to college compared with neurotypical norms, but participation in AMI resulted in notable gains in all facets of college adjustment. Survey data revealed that both mentors and mentees reported personal, academic, and professional benefits from participating in AMI. However, no improvements in academic achievement of the mentees were found. This study provided preliminary evidence for the benefits of an easily implemented and cost-effective peer mentorship program for autistic students in a college setting. Lay summary: Why was this program developed?: There are a growing number of autistic students attending college. However, the percentage of autistic students who complete their degree is quite low. We believe that colleges should be offering more support services to address the unique needs of their autistic students.What does the program do?: The Autism Mentorship Initiative (AMI) matches incoming autistic undergraduates with upper-level (third or fourth year) neurotypical undergraduates or graduate students who provide 1-on-1 mentorship. The autistic undergraduates meet regularly with their mentors to discuss personal and professional goals, discuss solutions for problems they are experiencing in college, and discuss ideas for increased integration into college campus life (e.g., joining clubs or attending social events). The neurotypical mentors receive ongoing training from program supervisors about autism and meet regularly with program supervisors to discuss progress with their mentees and troubleshoot issues they may be experiencing with their mentees.How did the researchers evaluate the program?: We evaluated AMI by administering the Student Adaptation to College Questionnaire at multiple time points to examine whether autistic mentees reported improvements in social, emotional, and academic adjustment to college as a result of participating in AMI. In addition to tracking changes in cumulative grade point average (GPA), we also administered program evaluation surveys to determine whether AMI is meeting its core aims and to assess satisfaction with the program from the perspectives of both mentors and mentees.What are the early findings?: While there were no changes in GPA, participation in AMI resulted in notable changes in mentees' academic, social, and emotional adjustment. Both mentors and mentees reported personal, academic, and professional benefits from their participation in AMI.What were the weaknesses of this project?: The sample size was small, so it is questionable whether the findings generalize to a broader autistic student population. In addition, there was no control group, so we cannot be certain that improvements in college adjustment were due to participation in AMI. Moreover, this study only assessed one program at one university in Western Canada, so it is unknown whether this program could be successfully implemented at other universities or in different geographic locations.What are the next steps?: As participation in AMI increases each year, follow-up studies will utilize larger sample sizes. We will seek to obtain control data by examining GPA and college adjustment in autistic students who do not participate in AMI. We will aim to conduct multisite trials to examine whether similar programs can be implemented at other universities.How will this work help autistic adults now and in the future?: We hope that our research will help faculty members and staff from disability support offices to gain ideas and insights in implementing similar-or better-programs at their respective institutions. Our experience is that mentorship programs can be both cost-effective and easily implemented, while offering an invaluable support system to autistic students that may increase the likelihood of degree completion.

7.
Psychol Res ; 84(5): 1407-1423, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-30603864

RESUMO

It is commonly accepted that attention is spontaneously biased towards faces and eyes. However, the role of stimulus features and task settings in this finding has not yet been systematically investigated. Here, we tested if faces and facial features bias attention spontaneously when stimulus factors, task properties, response conditions, and eye movements are controlled. In three experiments, participants viewed face, house, and control scrambled face-house images in an upright and inverted orientation. The task was to discriminate a target that appeared with equal probability at the previous location of the face, house, or the control image. In all experiments, our data indicated no spontaneous biasing of attention for targets occurring at the previous location of the face. Experiment 3, which measured oculomotor biasing, suggested a reliable but infrequent saccadic bias towards the eye region of upright faces. Importantly, these results did not reflect our specific laboratory settings, as in Experiment 4, we present a full replication of a classic finding in the literature demonstrating reliable social attention bias. Together, these data suggest that attentional biasing for social information is task and context mediated, and less robust than originally thought.


Assuntos
Atenção/fisiologia , Viés de Atenção/fisiologia , Orientação/fisiologia , Movimentos Oculares/fisiologia , Feminino , Humanos , Masculino , Adulto Jovem
8.
Vision (Basel) ; 3(2)2019 Jun 10.
Artigo em Inglês | MEDLINE | ID: mdl-31735830

RESUMO

Humans spontaneously attend to social cues like faces and eyes. However, recent data show that this behavior is significantly weakened when visual content, such as luminance and configuration of internal features, as well as visual context, such as background and facial expression, are controlled. Here, we investigated attentional biasing elicited in response to information presented within appropriate background contexts. Using a dot-probe task, participants were presented with a face-house cue pair, with a person sitting in a room and a house positioned within a picture hanging on a wall. A response target occurred at the previous location of the eyes, mouth, top of the house, or bottom of the house. Experiment 1 measured covert attention by assessing manual responses while participants maintained central fixation. Experiment 2 measured overt attention by assessing eye movements using an eye tracker. The data from both experiments indicated no evidence of spontaneous attentional biasing towards faces or facial features in manual responses; however, an infrequent, though reliable, overt bias towards the eyes of faces emerged. Together, these findings suggest that contextually-based social information does not determine spontaneous social attentional biasing in manual measures, although it may act to facilitate oculomotor behavior.

9.
Autism Res ; 11(12): 1586-1601, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30393953

RESUMO

This meta-analysis summarized studies that examined group differences on the production of facial expressions in participants with ASD compared to typically developing or nonautistic clinical comparison groups. The overall summary effect from 67 effect sizes representing the average ASD-comparison group differences in facial expressions was -0.481, indicating a moderate effect size. We conducted subgroup analyses to group effect sizes according to separate facial expression abilities identified in the literature. These analyses revealed that participants with ASD display facial expressions less frequently and for less amount of time, and they are less likely to share facial expressions with others or automatically mimic the expressions of real faces or face stimuli. Their facial expressions are also judged to be lower in quality and are expressed less accurately. However, participants with ASD do not express emotions less intensely, nor is their reaction time of expression onset slower in response to odors, startling sensations, or in response to face stimuli in mimicry studies. ASD-comparison group differences were moderated by matching procedures, age, and intellectual functioning of the ASD participants suggesting that persons with higher IQ and larger number of accumulated life experiences are better able to produce facial expressions that are more consistent with "neurotypical" norms. Group differences were also stronger for "covertly elicited" than "explicitly elicited" facial expressions suggesting individuals with ASD may naturally produce facial expressions differently from other populations, but are less impaired in expressing emotions typically when prompted to do so in a laboratory setting. Autism Research 2018, 11: 1586-1601. © 2018 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: We reviewed studies that compared facial expressions in people with and without autism. Results revealed that facial expressions of people with autism are atypical in appearance and quality and are used atypically to regulate social interactions. The magnitude of these differences was influenced by participant characteristics (e.g. age and intellectual functioning), and by how facial expressions were measured and analyzed in various studies.


Assuntos
Transtorno do Espectro Autista/psicologia , Expressão Facial , Emoções/fisiologia , Feminino , Humanos , Masculino , Tempo de Reação/fisiologia
10.
PLoS One ; 13(10): e0205341, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30335767

RESUMO

Adult aging is associated with difficulties in recognizing negative facial expressions such as fear and anger. However, happiness and disgust recognition is generally found to be less affected. Eye-tracking studies indicate that the diagnostic features of fearful and angry faces are situated in the upper regions of the face (the eyes), and for happy and disgusted faces in the lower regions (nose and mouth). These studies also indicate age-differences in visual scanning behavior, suggesting a role for attention in emotion recognition deficits in older adults. However, because facial features can be processed extrafoveally, and expression recognition occurs rapidly, eye-tracking has been questioned as a measure of attention during emotion recognition. In this study, the Moving Window Technique (MWT) was used as an alternative to the conventional eye-tracking technology. By restricting the visual field to a moveable window, this technique provides a more direct measure of attention. We found a strong bias to explore the mouth across both age groups. Relative to young adults, older adults focused less on the left eye, and marginally more on the mouth and nose. Despite these different exploration patterns, older adults were most impaired in recognition accuracy for disgusted expressions. Correlation analysis revealed that among older adults, more mouth exploration was associated with faster recognition of both disgusted and happy expressions. As a whole, these findings suggest that in aging there are both attentional differences and perceptual deficits contributing to less accurate emotion recognition.


Assuntos
Envelhecimento/fisiologia , Atenção/fisiologia , Olho , Reconhecimento Facial/fisiologia , Adulto , Idoso , Envelhecimento/psicologia , Ira/fisiologia , Emoções Manifestas/fisiologia , Face , Expressão Facial , Medo/psicologia , Feminino , Felicidade , Humanos , Masculino , Pessoa de Meia-Idade , Estimulação Luminosa/métodos
11.
PLoS One ; 12(11): e0188446, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29182643

RESUMO

A tendency to avoid eye contact is an early indicator of Autism Spectrum Disorder (ASD), and difficulties with eye contact often persist throughout the lifespan. Eye contact difficulties may underlie social cognitive deficits in ASD, and can create significant social and occupational barriers. Thus, this topic has received substantial research and clinical attention. In this study, we used qualitative methods to analyze self-reported experiences with eye contact as described by teens and adults with self-declared ASD. Results suggest people with a self- declared ASD diagnosis experience adverse emotional and physiological reactions, feelings of being invaded, and sensory overload while making eye contact, in addition to difficulties understanding social nuances, and difficulties receiving and sending nonverbal information. Some data support existing mindblindness frameworks, and hyperarousal or hypoarousal theories of eye contact, but we also present novel findings unaccounted for by existing frameworks. Additionally, we highlight innovative strategies people with self-declared ASD have devised to overcome or cope with their eye contact difficulties.


Assuntos
Transtorno do Espectro Autista/fisiopatologia , Olho/fisiopatologia , Adolescente , Adulto , Feminino , Humanos , Masculino , Adulto Jovem
12.
Can J Exp Psychol ; 71(3): 243-257, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28604031

RESUMO

Using a novel naturalistic paradigm allowing participants the freedom to spontaneously select and follow gaze cues in their environment, this study extends previous research conducted with younger children to determine whether school-age children with autism spectrum disorder (ASD, n = 17) demonstrate abnormal gaze following relative to typically developing (TD, n = 15) children. The participant and experimenter played a series of games, during which the experimenter pseudorandomly averted her gaze toward a social target (person) or a nonsocial target (object). A significant finding was that, relative to TD children, children with ASD were slower to follow the experimenter's gaze relative to the start of the trial (social targets d = -.93 [-1.70, -.16], nonsocial targets d = -1.05 [-1.88, -.20]). When we analyzed the duration of glances to the experimenter, we found that the ASD group made longer glances relative to TD children, but only in the nonsocial target condition (social targets d = .01 [-.68, .71], nonsocial targets d = -.81 [-1.53, -.08]). Other analyses revealed patterns of gaze selection and following that may help interpret the main findings. Despite the differences in the timing of gaze selection and following, the most common type of responder in both groups was one who followed the experimenter's gaze on over half of the trials. This pattern of results argues against a clear deficit in social attention in school-age children with ASD and underscores the importance of measuring both the timing of distinct mechanisms of social attention and the context in which these behaviors occur. (PsycINFO Database Record


Assuntos
Atenção/fisiologia , Transtorno do Espectro Autista/fisiopatologia , Fixação Ocular/fisiologia , Relações Interpessoais , Percepção Social , Adolescente , Criança , Medições dos Movimentos Oculares , Feminino , Humanos , Masculino
13.
J Autism Dev Disord ; 47(4): 1038-1050, 2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-28132120

RESUMO

This study presents a conceptual understanding of how mentorship is experienced by the participants of a mentorship program for university students with Autism Spectrum Disorder. We interviewed the participants of the Autism Mentorship Initiative at Simon Fraser University. A grounded theory approach was used to systematically organize data from interviews and documents to reveal themes that were salient to the mentees (students with autism; n = 9) and mentors (neurotypical students; n = 9). The following five main themes were identified and interrelated under the core theme of A Mentee-centered Approach: (1) The Natural Progression of the Relationship, (2) The Supportive Mentor, (3) The Meeting Process, (4) Identifying and Implementing Goals, and (5) Learning Together. An in-depth analysis of a mentorship process is described.


Assuntos
Transtorno do Espectro Autista/psicologia , Transtorno do Espectro Autista/terapia , Tutoria/métodos , Estudantes/psicologia , Universidades , Adulto , Feminino , Humanos , Masculino , Mentores/psicologia , Adulto Jovem
14.
Mol Autism ; 7: 46, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27895883

RESUMO

BACKGROUND: A prominent diagnostic criterion of autism spectrum disorder (ASD) relates to the abnormal or diminished use of facial expressions. Yet little is known about the mechanisms that contribute to this feature of ASD. METHODS: We showed children with and without ASD emotionally charged video clips in order to parse out individual differences in spontaneous production of facial expressions using automated facial expression analysis software. RESULTS: Using hierarchical multiple regression, we sought to determine whether alexithymia (characterized by difficulties interpreting one's own feeling states) contributes to diminished facial expression production. Across groups, alexithymic traits-but not ASD traits, IQ, or sex-were associated with quantity of facial expression production. CONCLUSIONS: These results accord with a growing body of research suggesting that many emotion processing abnormalities observed in ASD may be explained by co-occurring alexithymia. Developmental and clinical considerations are discussed, and it is argued that alexithymia is an important but too often ignored trait associated with ASD that may have implications for subtyping individuals on the autism spectrum.


Assuntos
Sintomas Afetivos/psicologia , Transtorno do Espectro Autista/psicologia , Expressão Facial , Reconhecimento Automatizado de Padrão/estatística & dados numéricos , Adolescente , Sintomas Afetivos/fisiopatologia , Transtorno do Espectro Autista/classificação , Transtorno do Espectro Autista/fisiopatologia , Estudos de Casos e Controles , Criança , Feminino , Humanos , Masculino , Percepção Social , Software
15.
Autism ; 20(6): 719-29, 2016 08.
Artigo em Inglês | MEDLINE | ID: mdl-26471426

RESUMO

We examined the relationship between characteristics associated with autism spectrum disorder and college adjustment in a sample of neurotypical college students. Using the Broad Autism Phenotype Questionnaire and the Student Adaptation to College Questionnaire, we found that higher levels of autism spectrum disorder characteristics were associated with poorer adjustment to college. One subscale of the Broad Autism Phenotype Questionnaire, pragmatic language difficulties, explained the most variance in adjustment. In addition, students who met the previously established cut-off scores for possessing the broad autism phenotype scored significantly lower on all Student Adaptation to College Questionnaire subscales. Finally, pragmatic language difficulties mediated the relationship between college major and academic adjustment. These findings underscore the need for future research to examine how pragmatic language difficulties may impede college success in students with autism spectrum disorder and in the typical population.


Assuntos
Logro , Adaptação Psicológica , Transtorno Autístico/psicologia , Ajustamento Social , Estudantes/psicologia , Adolescente , Adulto , Colúmbia Britânica , Feminino , Humanos , Masculino , Estudantes/estatística & dados numéricos , Inquéritos e Questionários , Universidades , Adulto Jovem
16.
Psychol Sci ; 26(11): 1693-705, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26386014

RESUMO

Implicit social biases are ubiquitous and are known to influence social behavior. A core diagnostic criterion of autism spectrum disorders (ASD) is abnormal social behavior. We investigated the extent to which individuals with ASD might show a specific attenuation of implicit social biases, using Implicit Association Tests (IATs) involving social (gender, race) and nonsocial (nature, shoes) categories. High-functioning adults with ASD showed intact but reduced IAT effects relative to healthy control participants. We observed no selective attenuation of implicit social (vs. nonsocial) biases in our ASD population. To extend these results, we supplemented our healthy control data with data collected from a large online sample from the general population and explored correlations between autistic traits and IAT effects. We observed no systematic relationship between autistic traits and implicit social biases in our online and control samples. Taken together, these results suggest that implicit social biases, as measured by the IAT, are largely intact in ASD.


Assuntos
Transtorno do Espectro Autista/psicologia , Tomada de Decisões , Preconceito , Comportamento Social , Classe Social , Estereotipagem , Adulto , Estudos de Casos e Controles , Feminino , Humanos , Masculino , Escalas de Graduação Psiquiátrica , Análise de Regressão , Inquéritos e Questionários , Adulto Jovem
17.
Cogn Neuropsychol ; 30(1): 25-40, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23537050

RESUMO

Simultanagnosia is a disorder of visual attention resulting from bilateral parieto-occipital lesions. Healthy individuals look at eyes to infer people's attentional states, but simultanagnosics allocate abnormally few fixations to eyes in scenes. It is unclear why simultanagnosics fail to fixate eyes, but it might reflect that they are (a) unable to locate and fixate them, or (b) do not prioritize attentional states. We compared eye movements of simultanagnosic G.B. to those of healthy subjects viewing scenes normally or through a restricted window of vision. They described scenes and explicitly inferred attentional states of people in scenes. G.B. and subjects viewing scenes through a restricted window made few fixations on eyes when describing scenes, yet increased fixations on eyes when inferring attention. Thus G.B. understands that eyes are important for inferring attentional states and can exert top-down control to seek out and process the gaze of others when attentional states are of interest.


Assuntos
Agnosia/complicações , Transtorno do Deficit de Atenção com Hiperatividade/complicações , Percepção Social , Campos Visuais/fisiologia , Adulto , Agnosia/etiologia , Agnosia/psicologia , Transtorno do Deficit de Atenção com Hiperatividade/etiologia , Transtorno do Deficit de Atenção com Hiperatividade/psicologia , Fixação Ocular/fisiologia , Humanos , Imageamento por Ressonância Magnética , Masculino , Testes Neuropsicológicos , Estimulação Luminosa , Síndrome da Leucoencefalopatia Posterior/complicações
18.
Child Dev ; 84(4): 1407-24, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23252761

RESUMO

The strategies children employ to selectively attend to different parts of the face may reflect important developmental changes in facial emotion recognition. Using the Moving Window Technique (MWT), children aged 5-12 years and adults (N = 129) explored faces with a mouse-controlled window in an emotion recognition task. An age-related increase in attention to the left eye emerged at age 11-12 years and reached significance in adulthood. This left-eye bias is consistent with previous eye tracking research and findings of a perceptual bias for the left side of faces. These results suggest that a strategic attentional bias to the left eye begins to emerge at age 11-12 years and is likely established sometime in adolescence.


Assuntos
Atenção , Emoções/fisiologia , Expressão Facial , Lateralidade Funcional/fisiologia , Criança , Medições dos Movimentos Oculares , Feminino , Humanos , Masculino , Reconhecimento Visual de Modelos/fisiologia , Estimulação Luminosa , Testes Psicológicos , Tempo de Reação , Adulto Jovem
19.
Soc Neurosci ; 6(5-6): 420-35, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21943103

RESUMO

The amygdala plays a critical role in orienting gaze and attention to socially salient stimuli. Previous work has demonstrated that SM a patient with rare bilateral amygdala lesions, fails to fixate and make use of information from the eyes in faces. Amygdala dysfunction has also been implicated as a contributing factor in autism spectrum disorders (ASD), consistent with some reports of reduced eye fixations in ASD. Yet, detailed comparisons between ASD and patients with amygdala lesions have not been undertaken. Here we carried out such a comparison, using eye tracking to complex social scenes that contained faces. We presented participants with three task conditions. In the Neutral task, participants had to determine what kind of room the scene took place in. In the Describe task, participants described the scene. In the Social Attention task, participants inferred where people in the scene were directing their attention. SM spent less time looking at the eyes and much more time looking at the mouths than control subjects, consistent with earlier findings. There was also a trend for the ASD group to spend less time on the eyes, although this depended on the particular image and task. Whereas controls and SM looked more at the eyes when the task required social attention, the ASD group did not. This pattern of impairments suggests that SM looks less at the eyes because of a failure in stimulus-driven attention to social features, whereas individuals with ASD look less at the eyes because they are generally insensitive to socially relevant information and fail to modulate attention as a function of task demands. We conclude that the source of the social attention impairment in ASD may arise upstream from the amygdala, rather than in the amygdala itself.


Assuntos
Tonsila do Cerebelo/fisiopatologia , Atenção/fisiologia , Transtorno Autístico/fisiopatologia , Comportamento Social , Adulto , Feminino , Humanos , Proteinose Lipoide de Urbach e Wiethe/fisiopatologia , Masculino , Pessoa de Meia-Idade , Adulto Jovem
20.
Brain Res ; 1367: 265-77, 2011 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-20950591

RESUMO

Simultanagnosia is a disorder of visual attention, defined as an inability to see more than one object at once. It has been conceived as being due to a constriction of the visual "window" of attention, a metaphor that we examine in the present article. A simultanagnosic patient (SL) and two non-simultanagnosic control patients (KC and ES) described social scenes while their eye movements were monitored. These data were compared to a group of healthy subjects who described the same scenes under the same conditions as the patients, or through an aperture that restricted their vision to a small portion of the scene. Experiment 1 demonstrated that SL showed unusually low proportions of fixations to the eyes in social scenes, which contrasted with all other participants who demonstrated the standard preferential bias toward eyes. Experiments 2 and 3 revealed that when healthy participants viewed scenes through a window that was contingent on where they looked (Experiment 2) or where they moved a computer mouse (Experiment 3), their behavior closely mirrored that of patient SL. These findings suggest that a constricted window of visual processing has important consequences for how simultanagnosic patients explore their world. Our paradigm's capacity to mimic simultanagnosic behaviors while viewing complex scenes implies that it may be a valid way of modeling simultanagnosia in healthy individuals, providing a useful tool for future research. More broadly, our results support the thesis that people fixate the eyes in social scenes because they are informative to the meaning of the scene.


Assuntos
Agnosia/complicações , Agnosia/psicologia , Atenção , Transtornos da Percepção/complicações , Percepção Social , Percepção Visual/fisiologia , Adolescente , Adulto , Análise de Variância , Estudos de Casos e Controles , Feminino , Fixação Ocular/fisiologia , Humanos , Masculino , Pessoa de Meia-Idade , Testes Neuropsicológicos , Estimulação Luminosa/métodos , Adulto Jovem
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