We investigated procedural learning in 18 children with basal ganglia (BG) lesions or dysfunctions of various aetiologies, using a visuo-motor learning test, the Serial Reaction Time (SRT) task, and a cognitive learning test, the Probabilistic Classification Learning (PCL) task. We compared patients with early (less than 1 year old, n=9), later…

Tasks administered to sixty females 60-120 months of age show that it is possible to test for Piagetian logic by using problems structured in a social context and also suggest that the order of acquisition of logical operations with social stimuli is consistent with the order which has been established with the use of physical stimuli. (Author/CS)