Investment Trait, Activity Engagement, and Age: Independent Effects on Cognitive Ability

Table 2

Correlations and descriptives for study variables.

		𝑁	𝑀	SD	1	2	3	4
1	Fluid ability	200	0.00	2.31	—
2	Crystallized ability	189	−0.01	2.52	.66^*	—
3	Age (years)	198	34.58	11.84	−.14^*	.18^*	—
4	Activity engagement	193	830.32	357.84	.08	.10	.00	—
5	Need for cognition	189	3.46	0.60	.34^*	.35^*	.00	.25^*

^∗𝑃<.05.
Note: need for cognition was recorded on a 5-point Likert scale, ranging from strongly disagree, disagree, somewhat agree, agree, to strongly agree. Activity engagement was also recorded on a 5-point scale and recoded in days per annum (i.e., every day =365; every other day =182; every week =52; once or twice a month =18; never =0).