TABLE 3.

Model fits and significance of successive fits for the hierarchical models for all participants

	Deviance	Chi square (change in degree of freedom)	p‐Value
Model 1	92.63
Model 2	76.61	16.02 (3)	.001
Model 3	47.05	29.57 (2)	< .001

Note:

Model 1: Age + log(# wrong moves) + Time of day administered + log(Day from start of each period) + Study period + log(Day from start of each period) : Study period.

Model 2: Model 1 + Diagnosis + HDRS‐17 (grand mean centered) + HDRS‐17 (subject centered).

Model 3: Model 2 + Median typing speed (grand mean centered) + Median typing speed (subject centered).

HDRS‐17: Hamilton Depression Rating Scale 17‐item; df: degrees of freedom.