TABLE 1.
Gamble 1 |
Gamble 2 |
|||||||
---|---|---|---|---|---|---|---|---|
Outcome 1 | Probability 1 | Outcome 2 | Probability 2 | Outcome 1 | Probability 1 | Outcome 2 | Probability 2 | |
1 | 80 | 0.5 | −80 | 0.5 | 60 | 0.25 | −20 | 0.75 |
2 | 10 | 0.5 | −20 | 0.5 | 130 | 0.25 | −50 | 0.75 |
3 | 70 | 0.5 | −170 | 0.5 | 20 | 0.5 | −120 | 0.5 |
4 | 30 | 0.5 | −50 | 0.5 | 10 | 0.5 | −30 | 0.5 |
5 | 50 | 0.5 | −30 | 0.5 | 80 | 0.5 | −60 | 0.5 |
6 | 150 | 0.5 | −10 | 0.5 | 190 | 0.5 | −50 | 0.5 |
7 | 160 | 0.5 | −80 | 0.5 | 60 | 0.75 | −20 | 0.25 |
8 | 40 | 0.5 | −80 | 0.5 | 20 | 0.75 | −140 | 0.25 |
9 | 70 | 0.5 | −50 | 0.5 | 20 | 0.75 | −20 | 0.25 |
10 | 200 | 0.5 | −30 | 0.5 | 130 | 0.75 | −50 | 0.25 |
11 | 50 | 0.5 | −30 | 0.5 | 80 | 0.75 | −200 | 0.25 |
12 | 50 | 0.5 | −30 | 0.5 | 40 | 0.75 | −80 | 0.25 |
13 | 120 | 0.25 | −60 | 0.75 | 60 | 0.25 | −40 | 0.75 |
14 | 10 | 0.25 | −50 | 0.75 | 40 | 0.25 | −60 | 0.75 |
15 | 100 | 0.25 | −80 | 0.75 | 20 | 0.75 | −200 | 0.25 |
16 | 80 | 0.25 | −40 | 0.75 | 20 | 0.75 | −100 | 0.25 |
17 | 140 | 0.25 | −30 | 0.75 | 20 | 0.75 | −5 | 0.25 |
18 | 20 | 0.75 | −100 | 0.25 | 110 | 0.25 | −50 | 0.75 |
19 | 60 | 0.75 | −60 | 0.25 | 150 | 0.25 | −10 | 0.75 |
20 | 60 | 0.75 | −20 | 0.25 | 200 | 0.25 | −10 | 0.75 |
21 | 100 | 0.75 | −140 | 0.25 | 60 | 0.75 | −20 | 0.25 |
22 | 100 | 0.75 | −80 | 0.25 | 80 | 0.75 | −20 | 0.25 |
23 | 10 | 0.75 | −70 | 0.25 | 40 | 0.75 | −160 | 0.25 |
24 | 80 | 0.75 | −40 | 0.25 | 100 | 0.75 | −100 | 0.25 |
25 | 150 | 0.5 | 0 | 0.5 | 0 | 0.5 | −50 | 0.5 |
26 | 10 | 0.5 | −200 | 0.5 | 200 | 0.75 | −10 | 0.25 |
Gamble pairs 1–24 have equal expected value, i.e. (outcome 1 × probability 1) + (outcome 2 × probability 2). Gamble pairs 25 and 26 are catch trials with noticeably different expected values.