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Permanent repository link:Memory for arousing events in ASD 2
AbstractEmotionally arousing events are typically better remembered and more resistant to forgetting than neutral events. Findings from word list paradigms suggest that this may not hold for individuals with Autism Spectrum Disorder (ASD), who also tend to be less accurate as eyewitnesses under some circumstances. To test whether attenuated effects of arousal on memory may be responsible for poorer eyewitness testimonies in ASD, we asked adults with and without the disorder to view either arousing or neutral versions of a narrated slide sequence (Experiment 1) or video clip (Experiment 2) before assessing their memory for the material. Both groups exhibited increases in psychophysiological arousal during the arousing as compared to the neutral version of the narratives, and both groups also demonstrated a memory advantage for the arousing events. Contrary to predictions, these observations indicate that stimulus induced arousal modulates memory for naturalistic events relatively typically in ASD. It is now well established that emotionally arousing events are better remembered and less likely forgotten than equivalent neutral events (e.g. Bornstein, Liebel, & Scarberry, 1998;Christianson & Loftus, 1991;Christianson, 1992; Heuer & Resiberg, 1990). Witnessed criminal events are often emotionally arousing, and witnesses can be asked by the police and other legal officials to recall what they have seen on a number of occasions, ranging from immediately after witnessing the event to days, months, or even years later. Maras and Bowler (2010) recently found that individuals with Autism Spectrum Disorder (ASD) were significantly less accurate in their eyewitness reports for a negative emotional event than comparison individuals when interviewed with a Cognitive Interview (Fisher & Geiselman, 1992). Here we ask whether the inaccuracies in eyewitness reports in ASD may be the result of abnormalities in how the emotional nature of criminal events modulates memory in this disorder.Autism Spectrum Disorder is a set of pervasive developmental conditions that are clinically defined by abnormalities in reciprocal social and communicative behaviours and an inflexible adherence to routinised patterns of thought and behaviour (American Psychiatric Association, 2000). ASD affects approximately 1% of the population but a number of risk factors indicate that individuals with ASD may be over-represented within the Criminal Justice System either as witnesses or victims of crime (Hare, Gould, Mills & Wing, 1999;Petersilia, 2001). For example their diminished insight into what others are thinking can lead to exploitation by others (Howlin, 1997) and their repetitive and stereotyped interests can lead them to frequent places (e.g. train stations) where crimes are more common (Allen, Evans, Hider, Hawkins, Peckett & Morgan, 2008). This lit...