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Table 1 The gain-loss structure in the original IGT.

From: Is deck C an advantageous deck in the Iowa Gambling Task?

IGT A B C D
1 100 100 50 50
2 100 100 50 50
3 100, -150 100 50, -50 50
4 100 100 50 50
5 100, -300 100 50, -50 50
6 100 100 50 50
7 100, -200 100 50, -50 50
8 100 100 50 50
9 100, -250 100, -1250 50, -50 50
10 100, -350 100 50, -50 50, -250
11 100 100 50 50
12 100, -350 100 50, -25 50
13 100 100 50, -75 50
14 100, -250 100, -1250 50 50
15 100, -200 100 50 50
16 100 100 50 50
17 100, -300 100 50, -25 50
18 100, -150 100 50, -75 50
19 100 100 50 50
20 100 100 50, -50 50, -250
21 100 100,-1250 50 50
22 100,-300 100 50 50
23 100 100 50 50
24 100, -350 100 50, -50 50
25 100 100 50, -25 50
26 100, -200 100 50, -50 50
27 100, -250 100 50 50
28 100, -150 100 50 50
29 100 100 50, -75 50, -250
30 100 100 50, -50 50
31 100, -350 100 50 50
32 100, -200 100, -1250 50 50
33 100, -250 100 50 50
34 100 100 50, -25 50
35 100 100 50, -25 50, -250
36 100 100 50 50
37 100, -150 100 50, -75 50
38 100, -300 100 50 50
39 100 100 50, -50 50
40 100 100 50, -75 50
Final Outcomes -1000 -1000 +1000 +1000
Gain-loss Frequency (in average 10 tirals) 5 gains 5 losses 9 gains 1 loss 5 gains 5 losses 9 gains 1 loss