Do elephants ever forget?
Three adult female elephants (Elephas maximus) were tested on a light-dark discrimination problem with an 8-yr intertrial interval. The first subject took only 6 min to reach criterion and made only two errors, suggesting remarkable retention. The other two subjects were found to have visual anomalies that would have gone undetected without this research.
D000818:Animals; D001522:Behavior, Animal; D003216:Conditioning, Operant; D004606:Elephants; D005260:Female; D008568:Memory; D013997:Time Factors; D014796:Visual Perception