FIGURE 9 in An analysis of fossil identification guides to improve data reporting in citizen science programs

FIGURE 9. Regressions of accuracy data reported by participants organized by educational background. '8'and '9' represent the last year of middle school and the freshman year of high school, respectively. '13' represents a bachelor's degree in any subject, '14' represents a master's degree in any subject, and '15' represents a PhD or equivalent degree in any subject. Black dots indicate mean accuracy for an educational background, the solid curve indicates a logarithmic regression for that accuracy data, and dashed curves show the 2σ confidence interval. 9A: regression of data accuracy using Sdice; 9B: regression of data accuracy using Sbc.