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Inner speech is used to mediate short-term memory, but not planning, among intellectually high-functioning adults with autism spectrum disorder.

Williams, D.M. and Bowler, D.M. and Jarrold, C. (2012) 'Inner speech is used to mediate short-term memory, but not planning, among intellectually high-functioning adults with autism spectrum disorder.', Development and psychopathology., 24 (1). pp. 225-239.

Abstract

Evidence regarding the use of inner speech by individuals with autism spectrum disorder (ASD) is equivocal. To clarify this issue, the current study employed multiple techniques and tasks used across several previous studies. In Experiment 1, participants with and without ASD showed highly similar patterns and levels of serial recall for visually presented stimuli. Both groups were significantly affected by the phonological similarity of items to be recalled, indicating that visual material was spontaneously recoded into a verbal form. Confirming that short-term memory is typically verbally mediated among the majority of people with ASD, recall performance among both groups declined substantially when inner speech use was prevented by the imposition of articulatory suppression during the presentation of stimuli. In Experiment 2, planning performance on a tower of London task was substantially detrimentally affected by articulatory suppression among comparison participants, but not among participants with ASD. This suggests that planning is not verbally mediated in ASD. It is important that the extent to which articulatory suppression affected planning among participants with ASD was uniquely associated with the degree of their observed and self-reported communication impairments. This confirms a link between interpersonal communication with others and intrapersonal communication with self as a means of higher order problem solving.

Item Type:Article
Full text:PDF - Published Version (200Kb)
Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1017/S0954579411000794
Publisher statement:© Copyright Cambridge University Press 2012. This paper has been published in a revised form subsequent to editorial input by Cambridge University Press in 'Development and psychopathology' (24: 1 (2012) 513-535 ) http://journals.cambridge.org/action/displayJournal?jid=NTS
Record Created:12 Sep 2012 11:05
Last Modified:14 Feb 2013 15:04

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