Table 2.

Mean intra-individual changes in prefrontal cognitive test scores across two menstrual cycles.

Cognitive Test	Measurement occasion			Model effect
	T1 thru T2	T2 thru T3	T3 thru T4
	Mean (SE)	Mean (SE)	Mean (SE)	p
CYCLE 1
Blockspan forwards	0.30 (0.18)	0.00 (0.12)	0.02 (0.14)	0.424
Blockspan backwards	−0.04 (0.09)	0.02 (0.09)	0.02 (0.10)	0.861
Cognitive bias	1.27 (0.33)*	−0.24 (0.30)	−0.11 (0.29)	0.002
Divided attention	2.11 (0.67)*	1.21 (0.60)*	−0.59 (0.75)	0.023
CYCLE 2
Blockspan forwards	0.24 (0.20)	−0.11 (0.15)	0.58 (0.14)*	0.008
Blockspan backwards	−0.10 (0.12)	0.15 (0.12)	−0.24 (0.13)	0.177
Cognitive bias	0.77 (0.35)*	0.13 (0.33)	0.02 (0.32)	0.273
Divided attention	0.58 (0.59)	0.66 (0.56)	−0.27 (0.68)	0.523

^*Change score significantly different from zero.

T1, Menstrual phase; T2, pre-ovulatory phase; T3, mid-luteal phase; T4, premenstrual phase.

Statistically significant parameter estimates are highlighted in bold face.