Parallel Processing in Visual Perception and Memory: What Goes Where and When? MARIA L. BERG AND JAMES G. MAY University of New Orleans This article begins with reviews of parallel processing models in the areas of visual perception and memory, pointing out kinds of information purported to be processed in each, and the overlap in the physiological substrates involved. Next, some pertinent literature having to do with the linkage between perception and memory is reviewed (e.g., visual memory for what or where), concluding that there exists a serious lack of research and knowledge of how different perceptual processes may lead to facilitated, distorted or impaired memory in different forms of storage. Some possible scenarios are presented concerning how perceptual information might be interfaced with memo- rial mechanisms, and some working hypotheses are considered. Finally, a new para- digm is outlined that examines the linkage between local and global perceptual pro- cessing and explicit and implicit learning. This paradigm combines the global prece- dence paradigm of Navon (1977; 1981) and the sequence learning paradigm of Nissen and Bullemer (1987). Convincing arguments indicate that global stimuli are mediated more quickly via one perceptual stream (the M-cell pathway), but can be processed more slowly by another (the P-cell system). Local aspects of the stimuli are exclu- sively mediated by the P-cell system. The results of two experiments employing iterations of stimulus sequence, in which sequence learning is possible and measur- able in terms of reaction time changes over trials are presented. The second experi- ment indicates that information thought to be mediated by the M-cell pathway results in incidental sequential learning, while other information thought to be mediated by the P-cell pathway does not. Spatial filtering of the visual stimuli reveals that low spatial frequencies are necessary for sequence learning to occur. The issue of whether this learning is implicit or explicit is also discussed. Ideas for future research, explor- ing this new area of interest, are proposed. Current knowledge of perceptual and memorial deficits in special populations are considered in an attempt to identify new areas of investigation. ... men combine together several ideas appre- hended by diverse senses or by the same sense at different times or in different circumstances, but observed, however, to have some connexion in Na- ture either with respect to co-existence or succes- sion; all which they refer to one name and con- sider as one thing. George Berkeley, 1733 Current Psychology: Developmental 9 Learning ~ Personality ~ Social Fall 1997AVinter 1998, Vol. 16, Nos. 3/4, 247-283.