Fig. 2

Marmosets call on command during visual detection task. a Mean distribution of hit and false alarm rates of 15 sessions in four animals exhibit significantly higher call probabilities during go-trials (hits) than during catch trials (false alarms). The main plot shows the group average; small plots show the mean of the four individual animals. Whiskers indicate standard error (SE). b Call probabilities during go-trials and catch trials. The main plot shows the group average; small plots show the mean of the four individual animals. Data were normalized for 15 sessions per animals. Shaded areas indicate SE. c Correlation between call response latencies after go-cue onset and the preceding waiting period (cue delay). The main plot shows the individual response latency with the corresponding cue delay for all calls uttered by the four animals in the 15 sessions, the small plots for each individual monkey. d Mean call type distribution for four monkeys during three time periods for self-initiated trials (pre-cue, go, and catch phase) and outside trials. Whiskers indicate standard error (SE). e Mean call probabilities during the pre-cue phase for the four animals. Note that monkeys E, L, and P were trained with 1–3 s and monkey H with 1–5 s pre-cue latency, respectively (gray, dashed vertical line). Shaded areas indicate SE. f Correlations between pre-cue calls and total number of calls, call rate (as a measure for arousal), and d′ values for each session for each animal. Subjects are colored according to (D). *p < 0.01, **p < 0.001, Pearson’s correlation