Extended Data Fig. 9: Dopamine tracks performance history in individual syllables.
From: Natural behaviour is learned through dopamine-mediated reinforcement
a, Magnified view of the regression coefficients over all development for the current rendition (0) and the previous two renditions (−1, −2) for all n = 25 syllables plotted as in Fig. 4d (error bars, mean ± s.e.m; *P < 0.001, two-sided t-test; see Methods). b, Fraction of performance history coefficients in linear regression fit to dopamine in Fig. 4b that are less than 0 compared to the shuffled distribution (see Methods). Coefficients are consistently negative above chance (P < 0.05, computed from shuffled distribution, see Methods). c,d, Linear regression fit of performance to dopamine for early (c) and late (d) development, plotted as in Fig. 4d. e, Plotted as in Fig. 4c. Coefficients of a linear regression fit of the song history to the dopamine signal for example syllables fit across development (blue trace, average over days; error bars, ±s.e.m.).
