FURTHER DEVELOPMENTS IN THE MEASUREMENT OF WORKING-MEMORY IN RODENTS

This article reviews automated test procedures that can be used to stu dy memory for discrete/trial-unique events in rodents and other animal s. A distinction is made between delayed response tasks, i.e. those ta sks for which all information necessary to determine the correct respo nse is available prior to the retention interval, and delayed comparis on tasks, i.e. tasks in which the subject must compare stimuli present ed prior to and after the retention interval in order to determine the correct response. Delayed comparison procedures potentially provide a purer estimate of the subject's memory capacities, but have also been more difficult for rodents to acquire. Suggestions are offered for po tential directions for improved delayed comparison tasks.