TY - JOUR
T1 - Global and local processing in Williams Syndrome, autism, and Down Syndrome
T2 - Perception, attention, and construction
AU - Porter, Melanie A.
AU - Coltheart, Max
PY - 2006
Y1 - 2006
N2 - Global and local processing was studied in Williams Syndrome (WS), autism (AS), and Down Syndrome (DS) using perception, attention, and construction tasks. Past research has suggested an abnormal bias toward global processing in DS and, in contrast, an abnormal local bias in both WS and AS. Until now, no study has investigated whether the local processing bias in WS and AS has a different or similar underlying cause. Findings here suggest a common underlying mechanism, namely a bias in attention toward local processing. Results also indicate a global bias in attention in DS. This study finds no evidence to support predictions of the hierarchical deficit theory (Mottron & Belleville, 1993) as an explanation of hierarchical processing deficits in AS or DS, but does find support for hierarchical deficit theory in a subset of WS individuals. This study finds evidence of cognitive heterogeneity in WS, consistent with Porter and Coltheart (2005).
AB - Global and local processing was studied in Williams Syndrome (WS), autism (AS), and Down Syndrome (DS) using perception, attention, and construction tasks. Past research has suggested an abnormal bias toward global processing in DS and, in contrast, an abnormal local bias in both WS and AS. Until now, no study has investigated whether the local processing bias in WS and AS has a different or similar underlying cause. Findings here suggest a common underlying mechanism, namely a bias in attention toward local processing. Results also indicate a global bias in attention in DS. This study finds no evidence to support predictions of the hierarchical deficit theory (Mottron & Belleville, 1993) as an explanation of hierarchical processing deficits in AS or DS, but does find support for hierarchical deficit theory in a subset of WS individuals. This study finds evidence of cognitive heterogeneity in WS, consistent with Porter and Coltheart (2005).
UR - http://www.scopus.com/inward/record.url?scp=33751555753&partnerID=8YFLogxK
U2 - 10.1207/s15326942dn3003_1
DO - 10.1207/s15326942dn3003_1
M3 - Article
C2 - 17083292
AN - SCOPUS:33751555753
VL - 30
SP - 771
EP - 789
JO - Developmental Neuropsychology
JF - Developmental Neuropsychology
SN - 8756-5641
IS - 3
ER -