Table 2: Correlations and descriptives for study variables.

𝑁 𝑀 SD1234

1Fluid ability2000.002.31
2Crystallized ability189−0.012.52.66*
3Age (years)19834.5811.84−.14*.18*
4Activity engagement193830.32357.84.08.10.00
5Need for cognition1893.460.60.34*.35*.00.25*

𝑃 < . 0 5 .
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 = 3 6 5 ; every other day = 1 8 2 ; every week = 5 2 ; once or twice a month = 1 8 ; never = 0 ).