Marmosets (Saguinus fuscicollis): Are Learning Sets Learned?
Confronted with a novel object, a social group of marmoset monkeys investigated it. If they found food on it they returned to it readily the next day; whoever had led in eating usually did so again. If they did not find food, day 2 responsiveness decreased. These untrained performances were sufficient for one-trial visual discrimination learning.
Menzel
E W
EW
Juno
C
C