Reward processing in autism.

TitleReward processing in autism.
Publication TypeJournal Article
Year of Publication2010
AuthorsScott-Van Zeeland, AA, Dapretto M, Ghahremani DG, Poldrack RA, Bookheimer SY
JournalAutism research : official journal of the International Society for Autism Research
Volume3
Issue2
Pagination53-67
Date Published2010 Apr
ISSN1939-3806
KeywordsAdult, Autistic Disorder, Brain, Cognition Disorders, Female, Humans, Learning, Magnetic Resonance Imaging, Male, Middle Aged, Neuropsychological Tests, Reward, Severity of Illness Index, Social Perception
Abstract

The social motivation hypothesis of autism posits that infants with autism do not experience social stimuli as rewarding, thereby leading to a cascade of potentially negative consequences for later development. While possible downstream effects of this hypothesis such as altered face and voice processing have been examined, there has not been a direct investigation of social reward processing in autism. Here we use functional magnetic resonance imaging to examine social and monetary rewarded implicit learning in children with and without autism spectrum disorders (ASD). Sixteen males with ASD and sixteen age- and IQ-matched typically developing (TD) males were scanned while performing two versions of a rewarded implicit learning task. In addition to examining responses to reward, we investigated the neural circuitry supporting rewarded learning and the relationship between these factors and social development. We found diminished neural responses to both social and monetary rewards in ASD, with a pronounced reduction in response to social rewards (SR). Children with ASD also demonstrated a further deficit in frontostriatal response during social, but not monetary, rewarded learning. Moreover, we show a relationship between ventral striatum activity and social reciprocity in TD children. Together, these data support the hypothesis that children with ASD have diminished neural responses to SR, and that this deficit relates to social learning impairments.

Alternate JournalAutism Res