Abstract :
[en] This study aimed to investigate the procedural deficit hypothesis (PDH) in children with
Specific Language Impairment (SLI) by using a mirror-drawing task, a sensorimotor
adaptation paradigm that does not involve sequence learning and has never before been
used in SLI. Thirty school-aged children with SLI matched to 30 control children had to trace
several figures seen only in mirror-reversed view in two learning sessions separated by a
one-week delay. Two practice conditions were compared: a constant condition in which
children had to trace the same figure throughout the learning trials, and a variable one in
which they had to trace different figures in each trial. Results revealed a similar learning
pattern between SLI and TD children in both practice conditions, suggesting that initial
learning for a nonsequential procedural task is preserved in SLI. However, children with SLI
generalized the mirror-drawing skill in the same way as control children only if there was
variability in the way the material was trained (variable practice). No significant schedule
effects were observed in the control group.
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