Comparable performance by man and macaque on memory for pictures.

Two macaques, shown a series of pictures, recognized 79% and 85% upon re-presentation after 45 other pictures intervened. Human subjects working with the identical pictures (chosen to avoid human linguistic and experiential connotations) averaged 83% correctly recognized. The human false 'recognition' rates were lower than the macaques', hence the average human accuracy was better, but the range of accuracy among the human subjects overlapped that of the macaques.