Figure 3.

Individual-level data on delinquency by sensation seeking and within-MZ-twin-pair differences in peer deviance. Small dots and triangles represent individual-level data. Large dots and triangles represent means. Error bars represent ± 2 SEs around the mean. Only data from MZ twins are presented. “higher PD than co-twin” (plotted using circles) or “lower PD than co-twin” (plotted using triangles) were classified based on whether the individual reported higher or lower peer deviance than his or her identical co-twin. “High sensation seeking” or “low sensation seeking” was classified based on whether the individual reported sensation seeking above or below the sample mean. See the online article for the color version of this figure.