Table 1.

Review of the Literature on Mediation Models and Sample Sizes in Research Applications.

				Sample size
Mediation model		Frequency	%	Minimum	Maximum	M	Mdn
Path model	Model 1	43	48.86	86	2,451	340	242
	Model 2	7	7.95	128	8,879	1,442	171
	Model 3	3	3.41	270	347	297	274
	Model 4	5	5.68	141	1,851	575	299
	Other a	30	34.09	93	1,042	347	308
	Total	88	100.00	86	8,879	447	266
SEM	Model 1	27	22.88	73	645	334	316
	Model 2	8	6.78	208	2,088	585	356
	Model 3	16	13.56	221	1,000	428	365
	Model 4	11	9.32	148	545	333	284
	Other	56	47.46	111	13,645	700	368
	Total	118	100.00	73	13,645	538	352
Total	Model 1	70	33.98	73	2,451	335	293
	Model 2	15	7.28	128	8,879	950	317
	Model 3	19	9.22	221	1,000	409	352
	Model 4	16	7.77	141	1,851	409	292
	Other	86	41.75	93	13,645	582	335
	Total	206	100.00	73	13,645	500	311

Note. SEM = structural equation model. M = mean. Mdn = median.

^aOther types of models include complex models with multiple-dependent variables and/or multiple mediators.