Variable | Definition | |
---|---|---|

Task 1 | ||

1 | offer value A | ρ q_{A} |

2 | offer value B | q_{B} |

3 | chosen value | value of chosen offer |

4 | chosen juice | binary; 1 if A chosen; 0 if B chosen |

Task 2 | ||

1 | AB | BA | binary; 1 in AB trials; 0 in BA trials |

2 | offer value A | AB | ρ q in AB trials, 0 in BA trials_{A} |

3 | offer value A | BA | ρ q in BA trials, 0 in AB trials_{A} |

4 | offer value B | AB | q in AB trials, 0 in BA trials_{B} |

5 | offer value B | BA | q in BA trials, 0 in AB trials_{B} |

6 | offer1 | value of offer1 |

7 | offer2 | value of offer2 |

8 | chosen value | value of chosen offer |

9 | chosen value A | chosen value if A chosen, 0 otherwise |

10 | chosen value B | chosen value if B chosen, 0 otherwise |

11 | chosen juice A | binary; 1 if A chosen; 0 if B chosen |

12 | chosen juice B | binary; 0 if A chosen; 1 if B chosen |

↵

Values were always defined in units of juice B (uB) based on relative values derived from the probit regressions (Eqs. 1, 2). Thus, the value of^{a}*q*drops of juice B was equal to_{B}*q*; the value of_{B}*q*drops of juice A was equal to ρ_{A}*q*. Each variable could be encoded with a positive or negative sign. For Task 2, variables chosen juice A and chosen juice B coincided, except for the sign (we use this notation for clarity)._{A}