A summary of an extensive literature survey deals with the variables known or suspected to affect the retention of learned motor behaviors over lengthy no-practice intervals. Emphasis was given to research conducted by or for the military. The variables that may affect the retention of motor skills were dichotomized into task variables and…

The terms "learning communities" and "communities of practice" are being used with increasing frequency to describe the phenomenon of groups (communities) of individuals learning together. Theories focusing on the social nature of cognition and meaning, as opposed to those focusing on individual learning, are stressed. In works…