An activity-withdrawal distinction in schizophrenia: Behavioral, clinical, brain damage, and neurophysiological correlates.

Although P. H. Venables introduced an activity-withdrawal distinction in schizophrenia in 1957, the activity variable has been virtually neglected in the research literature on this disorder. This is clearly unwarranted because, as this paper illustrates, this distinction is potentially related to a number of behavioral, clinical, brain damage, and neurophysiological variables. In addition to the presentation of new data, these variables are discussed in relation to the activity-withdrawal distinction, and future research is proposed. (42 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)