Table 1. Treatment Effects for Experienced Well-being: Mood Yesterday, Net Affect and U-Index.

	MTREATMENT (SD)	MCONTROL (SD)	pa	pb	pa	pb
			Unconditional		Conditional
Mood Yesterday
Portion of day spent in a positive mood	0.76 (0.18)	0.71 (0.25)	0.321	0.308	0.047**	0.035**
Portion of day spent with children in a positive mood	0.83 (0.21)	0.84 (0.19)	0.821	0.827	0.783	0.673
Net Affect
Net Affect	3.03 (1.41)	2.84 (1.37)	0.511	0.512	0.329	0.269
Net affect during time spent with PFL child	2.98 (1.58)	2.95 (1.38)	0.916	0.917	0.603	0.637
Net affect during time spent without PFL child	3.00 (1.78)	2.68 (1.59)	0.353	0.356	0.355	0.188
U-Index
U-Index	0.10 (0.14)	0.09 (0.18)	0.686	0.689	0.777	0.315
U-Index during time spent with PFL child	0.10 (0.16)	0.08 (0.18)	0.453	0.461	0.703	0.758
U-Index during time spent without PFL child	0.11 (0.24)	0.12 (0.27)	0.874	0.875	0.907	0.235

Notes: The sample size is 101 (Treatment = 46, Control = 55), except when we restrict the analysis to time spend without the PFL child as 5 control participants did not record any episodes without their PFL child, therefore n = 96 (Treatment = 46, Control = 50), and apart from Mood Yesterday (Treatment = 45, Control = 55). ‘M’ indicates the unconditional mean. ‘SD’ indicates the unconditional standard deviation.

^a two-tailed t-test p-value.

^b two-tailed p-value from an individual permutation test with 100,000 replications.

*** Significant at the 1 percent level.

** Significant at the 5 percent level.

* Significant at the 10 percent level.