Table 3. Relative Bias of Standard Error of Mediated Effect across Simulation Conditions.

Number of Measurements	Effect Size	Sample Size
		100	200	500	1,000	2,000	5,000
Three occasions
R2 = .5	Small	2.926	1.115	−0.082	−0.055	−0.007	0.006
	Medium	9.514	1.694	−0.025	0.032	−0.022	−0.032
	Large	9.741	1.265	0.028	−0.057	−0.025	−0.008
R2 = .8	Small	−0.024	0.024	−0.070	−0.049	0.003	−0.020
	Medium	−0.040	0.025	0.023	−0.011	0.026	0.029
	Large	−0.124	−0.006	−0.052	0.022	0.007	−0.006
Five occasions
R2 = .5	Small	−0.124	−0.007	−0.032	0.007	0.008	0.027
	Medium	−0.090	−0.041	−0.010	−0.033	0.026	0.008
	Large	−0.148	−0.058	−0.034	−0.019	0.040	−0.060
R2 = .8	Small	0.052	−0.034	−0.048	0.031	−0.085	0.030
	Medium	0.009	0.003	−0.003	−0.009	−0.075	−0.014
	Large	−0.062	0.020	−0.056	0.010	−0.023	−0.057

Note. Effect size was defined as the proportion mediated: small = .10, medium = .30, and large = .50. R² was the proportion of variances of the measured mediator and outcome accounted for by both intercept and slope factors. Standard error of mediated effect was obtained by Sobel's (1982) first-order delta-method.