Representations and Processes in Working Memory
Herbert L. Roitblat · Animal Cognition · 2013
On the occasion of Al Riley’s retirement, it seemed appropriate to look back at some of the work that grew out of my studies with him. My work on delayed matching to sample (DMTS) began in Al’s laboratory. He deserves much of the credit for pointing me in the directions this work has taken, but I must accept the blame for inadequacies that may be apparent to the reader. DMTS is a condition al discrimination task in which a sample stimulus is presented at the start of a trial and a set of alternative choice stimuli are presented later in the trial. The subject’s task is typically to select the alternative that is the same as or matches the sample. The DMTS performance of many species has been studied, including pigeons (Blough, 1959; Maki & Leith, 1973; Roberts & Grant, 1974; Zentall, Hogan, & Edwards, 1984), various monkey species (D’Amato, 1973; D’Amato, Salmon, & Colombo, 1985), and dolphins (Herman, 1980; Herman & Gordon, 1974; Hunt er, 1988).