. Author manuscript; available in PMC: 2010 Sep 1.

Published in final edited form as: Psychol Methods. 2009 Sep;14(3):202–224. doi: 10.1037/a0015826

Table 7. Coefficient Estimates for Main Effects under Different Designs in the Simulated Example, with Total Sample Size N = 320.

Factor:	breath	audience	choose	prep	notes	stakes
Population main effect (see equation 1):	0.25	0.00	0.50	0.30	0.30	-0.10
Complete factorial	0.24 ^*	0.18 ^†	0.69 ^***	0.40 ^***	0.51 ^***	-0.07
Individual experiments	0.51 ^††	0.16	1.14 ^***	-0.39	0.10	-0.39
Single factor designs
Comparative treatment	0.32 ^†	0.26	0.79 ^***	-0.32 ^†	0.31	-0.19
Constructive treatment	0.32 ^†	0.24	0.18	0.09	0.38 ^††	0.25
Fractional factorial designs
Resolution III	0.44 ^***	0.43 ^***	0.69 ^***	-0.15	0.64 ^***	-0.35 ^**
Resolution IV	0.24 ^*	0.18 ^†	0.69 ^***	0.40 ^***	0.42 ^***	-0.05
Resolution VI	0.24 ^*	0.18 ^†	0.69 ^***	0.40 ^***	0.51 ^***	-0.24 ^*

^†

Coefficient significant at α = .15

^††

Coefficient significant at α = .10

Coefficient significant at α = .05

^**

Coefficient significant at α = .01

^***

Coefficient significant at α = .001