PSYC 3265 Lecture Notes - Lecture 3: Visual Processing, Precession, Free Recall
28 Feb 2017
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Object stm: what objects are lijme, fades rapidly. Object stm is limited by the number of the objects. People can hold about four whole objects in mind before performance begins to decline. The most recent hypothesis is that there is a quantity-quality trade-off in visual wm. Articulatory suppression can be used to demonstrate that object stm does not rely on verbalization. Event related potentials erp"s began some 200 ms following presentation of a visual stimulus array and persisted until the last test item. Level of activation increased with stimulus load up to 4 itme,s assumed to be limit of capacity. Retention of object depends on binding of features. Only features within a given dimension (colour, shape, location) compete for storage capacity. When a visual interfering task during the retention interval involves: Movement processing (e. g. select a static asterisk among 11 moving ones): Memory for spatial location of dots is diminished. Color processing (e. g. select blue from red variants):
