Fig. 6: Model comparison for Study 2.

Points in the first and second rows show sampling rates for n = 151 participants. Human participant sampling is reproduced from Fig. 2. In the first row, horizontal solid lines link samples data for humans (black points) and Ideal Observer (grey points) when BF₀₁ > 3 (at least moderate evidence for equal means) while dotted lines indicate when BF₁₀ > 3 (at least moderate evidence for different means). Statistical details for these pairwise tests can be found in Supplementary Table 1. Study 2 confirms undersampling is inconsistent at best in the full condition. The second row shows BIC values, where lower values indicate better model fit. Black horizontal lines indicate when BF₀₁ > 3. When BF₁₀ > 3, the horizontal line is coloured the same as the point spread of the better model. Statistical details for these pairwise tests can be found in Table 6. Biased Prior (blue) dominates other models. The third row corroborates this conclusion, as Biased Prior model also best fitted the most participants. Model point spread data colours (See also legend in lower right panel): Cost to Sample (green), Cut Off (orange), Biased Prior (blue). Boxplots reflect first, second (median) and third quartiles, while whiskers reflect 1.5 interquartile range. Point spreads reflect individual participant mean values. Abbreviations: Subj = Models that make choices about subjective values; Obj = Models that makes choices about objective values.