A Model for Visual Memory Tasks

TLDR

A visual recall model describes how visual information is stored, scanned, rehearsed, and encoded auditorily, highlighting inherent limits of immediate memory. The model proposes that items are sampled by rapid scanning (~10 ms per letter) and recalled through verbal rehearsal in auditory storage, with repeated rehearsal preventing decay. The study found that brief visual stimuli are stored in visual memory in a form similar to the input, contain more information than later transmitted, and that auditory coding plays a key role in visual tasks.

Abstract

A model for visual recall tasks was presented in terms of visual information storage (VIS), scanning, rehearsal, and auditory information storage (AIS). It was shown first that brief visual stimuli are stored in VIS in a form similar to the sensory input. These visual “images” contain considerably more information than is transmitted later. They can be sampled by scanning for items at high rates of about 10 msec per letter. Recall is based on a verbal receding of the stimulus (rehearsal), which is remembered in AIS. The items retained in AIS are usually rehearsed again to prevent them from decaying. The human limits in immediate-memory (reproduction) tasks are inherent in the AIS-Rehearsal loop. The main implication of the model for human factors is the importance of the auditory coding in visual tasks.