Organizational factors in picture recognition memory

Since humans have been shown to have a large capacity for dealing with pictures but not for more abstract forms of visual information, it follows that humans must rely on existing mental structures in picture recognition tasks. A series of experiments were designed to examine some characteristics of that structure. The results indicate that something analogous to categories exists for pictures and that when subjects view pictures they tag these categories. The decision in a recognition task that they have or have not seen a picture appears to be based on whether or not an existing category has been tagged. For example, the results indicate subjects can detect a new picture as new with a high degree of certainty. Further, the results show that subjects use information contained in or associated with the new member of the pair in a forced-choice procedure for deciding which member of the pair is old. Since other research has shown that figure-ground ratings made by one group of subjects is a reliable predictor of errors for subjects ranging in age from five to adult, there is evidence that whatever the exact nature of these categories they are not only common between individuals but are established at a very early age.