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Temporal judgements of internal and external events in persons with and without autism
Ist Teil von
Consciousness and cognition, 2008-03, Vol.17 (1), p.203-209
Ort / Verlag
Amsterdam: Elsevier Inc
Erscheinungsjahr
2008
Link zum Volltext
Quelle
Access via ScienceDirect (Elsevier)
Beschreibungen/Notizen
When participants make judgments about the onset of self-initiated movements they typically report the movement occurred earlier than it had [Obhi, S. S., & Haggard, P. (2004). Free will and free won’t. American Scientific, 92, 358–365.]. One interpretation is that feed-forward processes lead to awareness of the movement prior to execution. Because individuals with autism experience reduced preparatory activity prior to a voluntary movement, the present study sought to determine whether these anticipatory biases are exhibited by persons with autism. Participants watched a dot move in a circle and pressed the spacebar any time after one revolution. A tone either followed the participants’ voluntary movement or was computer generated. Participants in both groups made anticipatory judgements regarding movement initiation (∼100ms). When the movement and tone occurred together this anticipatory bias was also present, regardless of which event participants focused on. Individuals with autism appear to have access to a similar representation of voluntary movements, however this representation may be more variable.