The neuropsychological basis of hypersociability in Williams and Down syndrome

Melanie A. Porter*, Max Coltheart, Robyn Langdon

*Corresponding author for this work

Research output: Contribution to journalArticle

167 Citations (Scopus)

Abstract

People with Williams syndrome (WS) display indiscriminate approach toward strangers in everyday life. People with Down syndrome (DS) can also do so, but to a lesser degree. Inappropriate approach behavior is also characteristic of people with acquired amygdala damage and people with acquired frontal lobe impairment; given this, the developmental disorder of social approach seen in WS and perhaps also DS might be due to poor emotion recognition (due to abnormal amygdala functioning) or poor control of behavior (due to frontal lobe abnormality). A third account of this developmental disorder of social cognition can be couched in terms of heightened salience for social stimuli. We explored these three hypotheses by testing emotion recognition, social approach and frontal lobe functioning in people with WS and DS. Overall, our results were inconsistent with predictions from the amygdala and social salience hypotheses. In contrast, results from a battery of neuropsychological tasks suggested that abnormal social approach in WS and DS in everyday life is best explained by frontal lobe impairment, in particular, poor response inhibition. Crown

Original languageEnglish
Pages (from-to)2839-2849
Number of pages11
JournalNeuropsychologia
Volume45
Issue number12
DOIs
Publication statusPublished - 2007

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