,Learning; Visual Perception. IDENTIFIERS *Visual Imagery

In a series of six e*Pepimenti, undergraduate pollege students visually imagined letters or words and then classified as rapidly as possible the imagined-letters for some physical'prOperty such as vertical- height.This procedure allowed for a preliminary assessment-of the temporal parameters of visualsimagination..The results delineate.a number of. visual image phenomena:. (1) visual image sequencing and formation is guided by implicit Speecti,when long unpronounceable letter strings are used; (2) when-short pronounceable 'words are used, the entire string_can,be simultaneously.represented in visual imagination, and plicit verbal control is. required; the capacity of the visualimage system.is very limited-- between three to-five letters for short easily pronounceable letter strings; and (4) visual image and visual percept representations of words are comparable for very Short _pronounceable letter strings, but as the length-of the string increase's Visual. image capacity fgr simultaneous representation is soon'exceeded.,(Author/WR