Learning and MemoryP and M channel-specific interference in the what and where pathwayKessels, Roy P. C.1,2; Postma, Albert1; de Haan, Edward H. F.1 Author Information 1Psychological Laboratory, Utrecht University, Heidelberglaan 2, NL-3584 CS Utrecht, The Netherlands 2Corresponding Author: Roy P. C. Kessels Received 24 August 1999; accepted 28 September 1999 NeuroReport: December 16, 1999 - Volume 10 - Issue 18 - p 3765-3767 Buy Abstract IT was the purpose of this experiment to study interference effects of colour or luminance peripheral flicker (in order to saturate either the parvocellular or the magnocellular stream) on object identity and spatial location memory. Colour flicker interfered with object identity recognition, whereas luminance flicker affected memory for spatial location. Moreover, overall performance was worse if coloured rather than grey-scaled objects were used in the stimulus display. There was no selective effect of coloured flicker affecting coloured objects and chromatic flicker affecting chromatic objects. These results provide strong evidence for the theoretical position that the what pathway relies heavily on information derived from the P stream and the where pathway on the M stream. © 1999 Lippincott Williams & Wilkins, Inc.