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. Author manuscript; available in PMC: 2018 Sep 13.
Published in final edited form as: J Cogn Enhanc. 2017 Nov 28;1(4):491–507. doi: 10.1007/s41465-017-0047-y

Table 2.

Exploratory factor analysis based on the pre-test scores

Pre-test variable Factor

Reasoning Inhibitory control Numerical skills
BOMAT 0.60 0.06 0.08
DAT space relationships 0.79 − 0.05 − 0.02
ETS form board 0.54 − 0.04 − 0.15
ETS surface development 0.64 0.02 0.18
Lecture videos overall score 0.37 0.04 0.09
AXCPT AY trials 0.11 0.71 − 0.03
AXCPT BX trials 0.08 0.57 0.09
DRM familiarity rating (lures only) 0.06 0.17 − 0.04
DRM falsely remembered 0.11 0.47 0.16
Math − 0.07 0.01 0.89
Delayed discounting (k) − 0.02 0.00 0.13

N = 115. We used the extraction method of Quartimin oblique rotation technique to derive our factors. Three factors had eigenvalues over 1 and together explained 41% of the variance. Values shown in bold in each column represent the elements that formed a single factor.