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Table 2 Between groups comparisons regarding social decision-making experiments

From: Cocaine use disorder in females is associated with altered social decision-making: a study with the prisoner’s dilemma and the ultimatum game

 

Controls (n = 55)

CUD (n = 129)

Statistics

p-value

Prisoner’s Dilemma

χ2 = 17.05

0.001

 Remain silent % (n) [CI 95%]

33 (19) [21–46]

66 (86) [58–74]

Categories of motives (Remain silent)

 Lack of information % (n) [CI 95%]

26 (5) [4–48]

51 (44) [40–62]

χ2 = 4.03

0.045

 Injustice/Internal values % (n) [CI 95%]

42 (8) [17–66]

36 (31) [26–46]

χ2 = 0.21

0.646

 Strategy % (n) [CI 95%]

31 (6) [8–54]

8 (7) [2–14]

χ2 = 7.73

0.005

 Religiosity % (n) [CI 95%]

0 (0) [0]

3 (3) [0–7]

χ2 = 0.69

0.406

Ultimatum Game

 1° propose mean of offered chocolates (SD) [CI 95%]

4.26 (1.30) [3.91–4.61]

4.03 (1.31) [3.80–4.26]

t = 1.12

0.261

 2° propose mean of offered chocolates (SD) [CI 95%]

5.16 (1.59) [4.73–5.58]

5.19 (2.06) [4.83–5.55]

t = 0.10

0.915

 1° response (acceptance of 2 chocolates) % (n) [CI 95%]

39 (22) [26–52]

66 (86) [58–74]

χ2 = 12.04

0.001

 2° response (acceptance of 4 chocolates) % (n) [CI 95%]

73 (25) [57–89]

74 (32) [60–88]

χ2 = 0.10

0.930

  1. Legend: Control – Healthy control females without a history of substance abuse; CUD – Females diagnosed with Cocaine Use Disorder. Propose – Analysis when participants proposed the chocolate division. Response - Analysis when participants were responders of the offers. CI 95% - Confidence Intervals