Table 3.

Mixed Effects Model Estimates for Time and Treatment on Validation and Invalidation

Parameter	Validation		Invalidation
Fixed Effects (β)	β or σ Estimate	Standard Error	β or σ Estimate	Standard Error
Intercept	3.16**	0.4	2.82**	0.43
Treatment	0.14	0.59	0.32	0.61
Time	0.001	0.003	0.001	0.003
Time × Treatment	0.002	0.004	0.002	0.004
Random Effects (σ)
Within-person variability	0.4	0.63	0.66	0.81

Note.

^**p > .001