Four experiments investigated the content of the memory used by rats in mediating retention
intervals interpolated during performance in a 12-arm radial maze. The delay occurred …

A representation is a remnant of previous experience that allows that experience to affect
later behavior. This paper develops a metatheoretical view of representation and applies it …

Two experiments indicated that pigeons commonly code samples associated with same
comparison in many-to-one matching. Experiment 1 showed that retention was similar for …

During operant transitive inference experiments, subjects are trained on adjacent stimulus
pairs in an implicit linear hierarchy in which responses to higher ranked stimuli are …

A short-term memory task was developed to determine whether the representation
controlling the choice behavior of pigeons is an image. The task involved observation of a …

Pigeons' memory for food-access duration and light duration was compared using a delayed
symbolic matching to sample task. At very brief delay (retention) intervals (ie, 0 or 1 sec) …

Replicates the finding that retention functions decrease more rapidly on trials initiated by a
food sample than on trials initiated by a no-food sample. This result was also obtained for …

Pigeons were trained on matching-to-sample (MTS) with differential sample-response
requirements that were identical with respect to two pairs of sample stimuli but were either …

Prepared as a tribute to Donald A. Riley, the essays that appear here are representative of a
research area that has loosely been classified as animal cognition--a categorization that …

Prospective memory (PM) involves forming intentions, retaining those intentions, and later
executing those intended responses at the appropriate time. Few studies have investigated …