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

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

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

ISSN: 1744-9081