Table 1.

Percentage of single and double responses (two-choices and bimodal density experiments pooled together)

MonkeyDelay typeSingle responses/total responsesDouble responses/total responsesAnticipatory trials/total trials
Long delays
P    (n = 2694)308/2694 (11%)1515/2694 (56%)
Short delays
    (n = 2291)1457/2291 (64%)3280/4985 (66%)
Long delays
T    (n = 1762)485/1762 (28%)917/1762 (52%)
Short delays
    (n = 1878)884/1878 (47%)2286/3640 (63%)