Table 2.

Results of linear mixed effect model of physical activity measured at T2 and T3 on interventions (Study 1).

	Mean between-group differencea	Standard deviationsb	Cohen’s dc	t-value	p-value
Fixed effects
Implementation intention only group vs. control group	-0.28	0.26	-0.38	-1.10	0.27
Mental simulation plus implementation intention group vs. control group	0.07	0.27	0.10	0.25	0.79
Mental simulation plus implementation intention group vs. Implementation intention only group	0.36	0.23	0.49	1.53	0.13
Residual		0.73
AIC	537.69	-		-	-
Log-likelihood	-260.85	-		-	-

Linear mixed effect model based on 92 participants and 276 observations. Dependent variable in all cases in metabolic equivalent (MET) per minute (MET.min^-1). AIC, Akaike Information Criterion.

^aDifference in mean MET.min^-1 across intervention groups at T2 and T3 combined.

^bStandard deviations of effect sizes estimates.

^cCohen’s d effect size coefficients were computed using residual standard deviations.