Measure | N | A path coefficient (SE) | B path coefficient (SE) | Indirect effect 95% CI | C′ path coefficient (SE) |

Intent (continuous) | |||||

Study 1 | 489 | 14.07 (2.54) | 0.353 (0.038) | [3.05, 7.33] | 1.59 (2.18) |

Study 3 | 408 | 11.82 (2.83) | 0.468 (0.037) | [2.86, 8.54] | 2.51 (2.15) |

Study 4 | 598 | 11.91 (2.15) | 0.524 (0.036) | [3.99, 8.79] | −1.307 (1.91) |

Intent (dichotomous) | |||||

Study 1 | 489 | 14.07 (2.54) | 0.020 (0.004) | [0.155, 0.455] | 0.340 (0.252) |

Study 3 | 410 | 11.63 (2.83) | 0.044 (0.005) | [0.254, 0.817] | 0.067 (0.282) |

Study 4 | 599 | 11.96 (2.15) | 0.034 (0.004) | [0.253, 0.592] | −0.112 (0.207) |

Each mediation model was evaluated separately, with each indirect effect calculated and each SE estimated via bootstrap using the PROCESS macro. The individual indirect effects were weighted by a factor of 1/(SE

^{2}) (i.e., inverse variance weighting) to produce a first-order estimate of the mean indirect effect size. For Intent (continuous): mean effect size = 5.53, SE = 0.711,*Z*= 7.77,*P*< 0.001. For Intent (dichotomous): mean effect size = 0.362, SE = 0.053,*Z*= 6.78,*P*< 0.001. Coefficients in study 3 do not control for participant estimates of actual time.