. Author manuscript; available in PMC: 2017 Sep 1.

Published in final edited form as: Health Psychol. 2016 Apr 18;35(9):967–978. doi: 10.1037/hea0000343

Table 2.

Flanker Regression Values for Fitness at Time 1 & 2 (T1/T2), and ΔFitness.

Variable	Step 1 R²	Step 2 ΔR²	B	SE B	β	t
T1 Compatible Congruent RT	.076^**	.036^**	−2.74	0.81	−.21	−3.4
T1 Compatible Incongruent RT	.070^**	.032^**	−2.86	0.90	−.20	−3.2
T1 Incompatible Congruent RT	.102^**	.028^**	−2.52	0.83	−.19	−3.0
T1 Incompatible Incongruent RT	.111^**	.023^**	−2.38	0.87	−.17	−2.7
T2 Compatible Incongruent Accuracy	.056^**	.027^**	0.18	0.06	.20	2.9
T2 Compatible Accuracy Interference	.027	.019^*	−0.10	0.04	−.16	−2.4
Δ Comp. Incong. Acc. (ΔFitness)	.531^**	.013^**	0.21	0.08	.13	2.8
Δ Comp. Acc. Interference (ΔFitness)	.566^**	.009^*	0.12	0.05	.11	2.5

Note:

p ≤ .05,

^**

p ≤ .01. Demographic variables were included in Step 1 (grade, sex, mother’s education, BMI), and fitness (i.e., PACER laps) was entered in Step 2. Baseline fitness and cognitive performance were also entered in Step 1 when analyzing change (Δ) in fitness.

BMI – Body mass index; PACER – Progressive Aerobic Cardiovascular Endurance Run.