![]() ![]() Based on four trials of 60 s, we observed a significant three-way interaction. Moreover, by using superimposed stimuli, we controlled for possible effects of preferential looking, spatial attention, and disengagement. This frequency-tagging method allows disentangling the respective neural responses evoked by the different streams of stimuli. Streams of variable images of faces and houses were superimposed, and each stream of stimuli was tagged with a particular presentation rate (i.e., 6 and 7.5 Hz or vice versa). We recorded electroencephalography (EEG) during fast periodic visual stimulation (FPVS) of social versus non-social stimuli to obtain an objective implicit neural measure of relative social bias. In this study, we tested the neural sensitivity for social versus non-social information in 21 boys with ASD (8-12 years old) and 21 typically developing (TD) control boys, matched for age and IQ, while children were engaged in an orthogonal task. Thus far, however, it has been challenging to quantify individual differences in social orientation and interest, and to pinpoint the neural underpinnings of it. The social motivation hypothesis states that a reduced interest in social stimuli may partly underlie these difficulties. Individuals with autism spectrum disorder (ASD) have difficulties with social communication and interaction.
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