A study on sentence processing involving rehearsal, response initiation, and mental transformation required the subject to perform a secondary task concurrently with transformation of a sentence previously given. A secondary task interruption technique was used to allow inferences as to where the planning occurs by measuring increases in task time…

Studies investigating the functioning of persons who have cerebral lesions and evidence from the study of commisurotomized and normal subjects are reviewed. A study of recognition of pictorial stimuli by right-handed male children is also discussed. Studies about cerebral lesions and associated deficits have yielded information about the…