Figure 2.

Social influence in belief formation decreases during adolescence. (a–c) Perceptual judgement task measuring social information use in belief updating. (a) Participants repeatedly observed images showing a number of animals. (b) After 6 s, the image disappeared and participants had to estimate how many animals were shown. (c) Then, they observed social information (the estimate of a participant who completed the task before), and entered their second estimate. We measured social information use as the extent to which participants adjusted their estimate towards the social information (see 'Methods'). (d) Mean adjustments towards social information as a function of age. The line shows the prediction of a regression, with standard errors in shades (see 'Methods'). For numbers of observations per data point, table 1. (Online version in colour.)