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. 2015 Oct 14;6:1543. doi: 10.3389/fpsyg.2015.01543

Table 1.

Descriptive statistics and correlation matrix of survey and behavioral measures.

Measure M (SD) 1 2 3 4 5 6 7 8 9 10 11 12
1 Self-math overlap 3.24 (1.63)
2 Math anxiety 30.62 (20.65) -0.61∗∗∗
3 Math performance 50.64 (24.63) 0.35∗∗∗ -0.36∗∗∗
4 Valuation of math 10.27 (5.04) 0.73∗∗∗ -0.66∗∗∗ 0.32∗∗∗
5 Perceived math ability 1.89 (1.06) 0.70∗∗∗ -0.71∗∗∗ 0.37∗∗∗ 0.75∗∗∗
6 Math bias - 0.61∗∗∗ -0.62∗∗∗ - 0.68∗∗∗ 0.93∗∗∗
7 Trait anxiety 40.94 (10.73) -0.21∗∗ 0.44∗∗∗ 0.02 -0.23∗∗ -0.30∗∗∗ -0.33∗∗∗
8 Working memory capacity 40.06 (15.57) 0.03 -0.06 0.13† 0.02 -0.02 -0.08 -0.08
9 Self-literature overlap 2.91 (1.52) -0.23 0.18 -0.17 -0.18 -0.15 -0.10 0.07 0.12
10 Self-friend overlap 4.79 (1.35) -0.03 0.17 0.00 -0.11 -0.11 -0.11 0.01 -0.01 0.07
11 Verbal performance -0.01 (0.75) 0.06 -0.22∗∗ 0.13† 0.15 0.19 0.15 -0.07 0.15 0.23∗∗ -0.07
12 Perceived reading ability 2.24 (0.93) -0.06 -0.13† -0.16 -0.03 0.02 0.08 -0.23∗∗ 0.17 0.46∗∗∗ -0.08 0.37∗∗∗
13 Literature bias - -0.09 -0.05 -0.23∗∗ -0.09 -0.06 0.03 -0.22∗∗ 0.12† 0.40∗∗∗ -0.06 - 0.93∗∗∗

Covariates are shown in grey. N = 181. †p < 0.10, p < 0.05, ∗∗p < 0.01, ∗∗∗p < 0.001. M(SD) for bias measures are by definition 0(1) – see Methods for details. Note also that bias scores are residualized against math and verbal performance, respectively, so means for bias scores and correlations between a bias and a performance score are necessarily 0.