Personality trait by intelligence interaction effects on grades tend to be synergistic

Sorjonen, Kimmo; Wallin, Alma Sörberg; Falkstedt, Daniel; Melin, Bo

doi:10.1186/s40359-021-00708-1

BMC Psychology

Table 1 Correlations and standardized regression effects between study variables

From: Personality trait by intelligence interaction effects on grades tend to be synergistic

Personality item		Grade point average				Highest degree achieved
Personality item	1. r(iq)^a	2. r(gr)^b	3. b(pe²)^c	4. Int-C^d	5. Int-A^e	6. r(de)^b	7. b(pe²)^c	8. Int-C^d	9 Int-A^e
1. Disorganized^f	0.032*	− 0.074**	0.005	− 0.069**	− 0.072**	− 0.084**	0.005	− 0.028	− 0.028
2. Conscientious	0.188**	0.167**	0.041*	0.043*	0.035	0.139**	0.016	0.040*	0.043*
3. Undependable^f	− 0.128**	− 0.125**	0.027	− 0.068*	− 0.062*	− 0.159**	0.018	− 0.009	− 0.005
4. Thorough^f	0.080**	0.090**	− 0.021	0.037*	0.033	0.102**	− 0.038*	0.002	0.002
5. Agreeable^g	0.028	0.088**	− 0.022	0.026	0.024	0.097**	− 0.023	0.021	0.023
6. Difficult^g	− 0.085**	− 0.114**	− 0.048*	− 0.025	− 0.024	− 0.134**	− 0.052**	− 0.004	− 0.004
7. Stubborn^g	0.080**	− 0.001	− 0.065**	0.008	0.003	− 0.031	− 0.080**	− 0.018	− 0.016
8. Trustful^g	0.059**	0.057*	− 0.012	0.032	0.032	0.067**	− 0.007	− 0.001	− 0.001
9. Extraverted^h	0.009	0.043*	0.000	− 0.005	− 0.003	0.072**	− 0.009	− 0.017	− 0.018
10. Critical^g	− 0.043*	− 0.054**	− 0.007	− 0.052**	− 0.052**	− 0.057**	− 0.030*	− 0.027*	− 0.028*
11. Dependable^f	− 0.001	0.072**	− 0.021*	0.041*	0.039*	0.076**	− 0.045**	0.036*	0.042*
12. Anxious^h	− 0.199**	− 0.109**	− 0.070**	− 0.005	0.001	− 0.169**	− 0.100**	0.021	0.010
13. Open^h	0.018	− 0.003	− 0.052**	− 0.003	0.002	0.056**	− 0.069**	0.004	0.010
14. Reserved^h	− 0.122**	− 0.062**	− 0.053*	− 0.021	− 0.019	− 0.085**	− 0.098**	0.016	0.011
15. Sympathetic^g	0.050**	0.069**	− 0.016	0.039*	0.037*	0.093**	− 0.049**	0.014	0.016
16. Careless^f	0.044*	− 0.065**	− 0.048*	− 0.048*	− 0.051**	− 0.067**	− 0.082**	− 0.028*	− 0.029*
17. Calm^h	0.033*	0.045*	− 0.029*	0.014	0.012	0.087**	− 0.050**	0.015	0.017
18. Conventional^h	− 0.077**	− 0.007	− 0.060**	− 0.001	0.003	− 0.034*	− 0.070**	0.012	0.012
Composite
19. Dependable	0.012	0.116**	− 0.021*	0.066**	0.066**	0.125**	− 0.022*	0.032*	0.033*
20. Agreeable	0.057**	0.097**	− 0.002	0.041*	0.042*	0.119**	0.001	0.014	0.014
21. Open	0.142**	0.082**	− 0.020*	0.010	0.004	0.157**	− 0.026*	− 0.022	− 0.023

^aCorrelation with intelligence, ^bcorrelation with grades/degree, ^cquadratic term for the association with grades/degree, ^dcrude intelligence by personality trait interaction effect on grades/degree, not adjusting for quadratic terms, ^eintelligence by personality trait interaction effect on grades/degree, adjusted for quadratic terms, ^fincluded in the Dependable composite, ^gincluded in the Agreeable composite, ^hincluded in the Open composite, *p < 0.05, **p < 0.000256

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