Argues that theoretical developments in cognitive psychology and the increasing use of introspective reports require a rationale, and that this should involve consideration of consciousness. An information-processing model is suggested for cognitive processes, based on the ideas of G. A. Miller, E. Galanter, and K. H. Pribram. Its main characteristic is that while only 1 "action system" (similar to a plan) can be maximally activated at any time, other such systems may be more weakly activated. The model is derived by cybernetic analogies, and empirical evidence for the model is briefly reviewed. It is suggested that part of the model (the selector input to the dominant action system) has properties which correspond to those of consciousness. The selector input has the functions of selecting which action system is dominant and of setting its goal. (42 ref.)
