Table 3.

Correlation matrix for four types of self-control measures

	Exec Function	Delay Tasks	Self-report	Informant Report
Executive Function Tasks	r =.15 [.14, .17] k = 147, j = 324 N = 12,118 Q = 536.73, p < .001	r =.11 [.08, .15] k = 19, j = 41 N = 1,470 Q = 47.09, p = .21	r =.10 [.08, .12] k = 51, j = 120 N = 3,922 Q = 165.59, p = .003	r =.14 [.12, .15] k = 45, j = 140 N = 3,802 Q = 216.01, p < .001
Delay of Gratification Tasks		r =.21 [.09, .32] k = 4, j = 4 N = 270 Q =.57, p = .90	r =.15 [.11, .18] k = 19, j = 33 N = 2,317 Q = 42.02, p = .11	r =.21 [.17, .25] k = 9, j = 17 N = 1,188 Q = 26.13, p = .05
Self Report Questionnaire			r =.50 [.48, .51] k = 47, j = 57 N = 7,782 Q = 686.48, p < .001	r =.48 [.46, .50] k = 17, j = 29 N = 3,770 Q = 440.11, p < .001
Informant Report Questionnaire				r =.54 [.53, .55] k = 44, j = 142 N = 9,881 Q = 1628.17, p < .001

Note. r = average correlation coefficient, based on a fixed effects model (weighted by the inverse variance); 95% confidence interval is given in brackets [ ]; k = number of samples included in average correlation; j = number of effect sizes included in average correlation; N = number of participants included in average correlation.; Q = Q statistic for homogeneity test; p = p-value associated with the Q-statistic.