Table 2.

Power and sample size analyses

	Measure	Factor(s)	p value	Effect size			Post hocpower	Sample size
	Measure	Factor(s)	p value	Partial η²	Cohen’s f	Interpretation	Post hocpower	Ideal	Actual
a	Cocaine locomotion (time bins)	Time	<0.001	0.543	1.09	Large	1	4	28
		Genotype	<0.001	0.317	0.681	Large	0.964	15	28
		Time × genotype	0.002	0.226	0.54	Medium	0.916	10	28
b	Cocaine locomotion (pre- vs postexposure)	Time	<0.001	0.609	1.248	Large	1	6	28
		Genotype	0.004	0.31	0.67	Large	0.855	16	28
		Time × genotype	0.002	0.274	0.614	Large	0.908	4	28
c	Shaping of the operant response	Stage	<0.001	0.679	0.901	Large	1	4	27
		Genotype	0.812	0.054	0.239	Small	N/A	114	27
		Stage × genotype	0.265	0.008	0.09	Null	N/A	124	27
d	Trials to criterion	Phase	<0.001	0.456	0.915	Large	N/A	6	40
		Genotype	0.268	0.085	0.305	Small	1	54	40
		Phase × genotype	0.067	0.032	0.182	Small	N/A	66	40
e	Errors to criterion	Phase	<0.001	0.438	0.883	Large	1	8	40
		Genotype	0.416	0.065	0.264	Small	N/A	64	40
		Phase × genotype	0.113	0.018	0.135	Null	N/A	202	40
f	Omissions per trial	Phase	0.074	0.081	0.297	Small	N/A	12	40
		Genotype	0.143	0.041	0.207	Small	N/A	166	40
		Phase × genotype	0.208	0.056	0.244	Small	N/A	18	40
g	Trial initiation latency	Phase	0.003	0.205	0.508	Medium	0.853	22	40
		Genotype	0.63	0.013	0.115	Null	N/A	236	40
		Phase × genotype	0.49	0.06	0.253	Small	N/A	78	40
h	Pellet retrieval latency	Phase	0.026	0.015	0.124	Null	0.619	192	40
		Genotype	0.172	0.011	0.105	Null	N/A	448	40
		Phase × genotype	0.51	0.048	0.225	Small	N/A	60	40
i	Failed/successful initiation attempts	Hold requirement	<0.001	0.671	1.428	Large	1	4	40
		Genotype	0.008	0.184	0.475	Medium	0.784	30	40
		Hold requirement × genotype	0.006	0.162	0.44	Medium	0.814	12	40

Post hoc power and effect size are reported for each behavioral measure, as well as a comparison between ideal and actual sample sizes.