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Model Comparison for individual plays.
| Model | Parameters per subject | Mean r2 | Median r2 | Model BIC | BIC-BICdual |
|---|---|---|---|---|---|
| Single alpha | 3 | 0.29 | 0.25 | 1,061,299 | 1481 |
| Dual alpha | 4 | 0.37 | 0.34 | 1,059,817 | 0 |
Bayesian information criterion (BIC) measures are summed for fits for each participant’s first play (N = 26,720). Both models included choice stochasticity (inverse temperature) and loss aversion parameters. The final column is the difference between the model BIC and BIC for the Dual Alpha model.
