Social learners choosing left in experiment 2.

Results are from logistic regressions for the prior and no prior treatments. Data are pooled over discordant and concordant blocks. Independent variables include an index for the 20 learning blocks in each session and the distribution of choices among demonstrators in the fifth trial of the block. This distribution is centered at zero. Thus, if p5 is the proportion of demonstrators choosing left in the fifth trial, we transform this as x5 = p5 − 0.5. Robust standard errors clustered on social learner account for any correlations due to multiple observations per social learner [48, 49], and we show these robust clustered standard errors in parentheses. The final column combines the analysis of the prior and no prior treatments and shows no significant difference between them. In particular, the estimated rates of choosing left are not significantly different at the extreme values of x5. Specifically, for the linear combination, “No prior + 0.5 (No prior × Prop left, centered)”, F = 2.7684 and p = 0.096. For “No prior − 0.5 (No prior × Prop left, centered)”, F = 0.005 and p = 0.943.