Book Reviews
Abstract
BOOK REVIEWS Tryon, W. W. Activity Measurement in Psychology and Medicine. New York: Plenum, 1991. xx + 247 pp. $39.50. I believe that it would be safe to say that the study of psychopathology has been and continues to be replete with poorly defined and poorly assessed and thus poorly understood psychological constructs. And I believe that it would be safe to say that today's long list of poorly defined, poorly assessed, and poorly understood constructs has at least one less item than the long lists of the past. For in the last 15 years, there has been and continues to be much attention and effort directed toward the sound and sensitive and sensible measurement of the construct of activity-a construct that appears in the descriptive and explanatory accounts of a whole host of adult and childhood disorders. These significant advances in conceptualization, quantification, and explication of the activity construct are very neatly spelled out by Tryon in the very neatly organized book of his titled Activity Measurement in Psychology and Medicine. Also very neatly spelled out by Tryon in this very scholarly book of his are the various mechanisms and merits of the various mechanical devices that