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Clinical Trial Summary

In the proposed pilot study, ASD+ toddlers will undergo Social Value Training (SVT) using a gaze-contingent eye-tracking paradigm in toddlers with elevated symptoms of ASD (ASD+) (n=48). SVT will be administered over a two-day period and the training effects will be assessed by changes in visual attention to high-value (HV) faces as compared to low-value (LV) faces between baseline, post-baseline, and a follow-up assessment using two tasks: a laboratory selective attention (LSA) task and real-world selective attention (RWSA) task. The investigators will also evaluate acceptability and feasibility of the value training and contribution of sex, nonverbal developmental level, and severity of autism symptoms to response to the training.


Clinical Trial Description

One of the markers of autism spectrum disorders (ASD) in infants and toddlers is impaired selective attention to faces. This impairment diminishes their ability to learn from and interact adaptively with others in real-world environments. Attentional selection in the social domain relies, in part, on one's ability to encode reward values of people and store these values in long-term memory as stable values. The 'stable' values (henceforth, 'values') are learned over the course of repeated learning opportunities, and once acquired, they are signaled rapidly, preferentially directing gaze to encoded faces of importance (high-value, HV) based on their hedonic or informative properties in the past. Automatic responses based on values stored in long-term memory are essential for survival when decisions have to be made rapidly (e.g., mother versus stranger). Learning about values is subserved by the reward learning system in the brain involving basal ganglia (BG) circuitry. This circuitry is implicated in the pathophysiology of ASD and extant evidence suggests that individuals with ASD exhibit specific impairments in learning the reward value of social stimuli such as faces. Based on this evidence, the investigators propose that limited attention to faces in toddlers with elevated autism symptoms (ASD+) is, in part, driven by impaired value learning in the social domain, affecting their ability to rapidly and preferentially select HV faces and ignore low-value (LV) faces in the complex real-world environment. Consequently, they exhibit diminished spontaneous attention to faces in general, and when they look at faces, they may distribute their limited attentional resources between high- (e.g., mother or therapist) and low-value (stranger) individuals in a trial-and-error fashion. The investigators further hypothesize that reinforcing attention of children with ASD+ toward specific faces through social value training (SVT) will increase their attention to these faces in real-world environments. In the proposed pilot study, ASD+ toddlers will undergo Social Value Training (SVT) using a gaze-contingent eye-tracking paradigm in toddlers with elevated symptoms of ASD (ASD+) (n=48). SVT will be administered over a two-day period and the training effects will be assessed by changes in visual attention to high-value (HV) faces as compared to low-value (LV) faces between baseline, post-baseline, and a follow-up assessment using two tasks: a laboratory selective attention (LSA) task and real-world selective attention (RWSA) task. The investigators will also evaluate acceptability and feasibility of the value training and contribution of sex, nonverbal developmental level, and severity of autism symptoms to response to the training. Study was hindered by Covid and masking, therefore primary and secondary outcomes were unable to be collected as intended. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT03556826
Study type Interventional
Source Yale University
Contact
Status Terminated
Phase N/A
Start date December 13, 2019
Completion date March 3, 2020

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