. 2014 Mar 7;9(3):e91285. doi: 10.1371/journal.pone.0091285

Table 7. Sleep quality as a mediator in the relationships between negative affect and daydreaming, and negative affect and mind wandering.

Model 1a
	IV	mediator	DV	IV β	Mediator β	Age β	Gender β
Path c	NA	−	DF	.418***	−	−.037	−.076
Path a	NA	PSQI Global	−	.371***	−	.048	.035
Paths b and c’	NA	PSQI Global	DF	.333***	.227***	−.048	−.084
Final Model: R = .471; adjusted R² = .210; F(4, 265) = 18.849; Indirect effect (a ^* b): bias corrected^† 95% C.I. = .0432 to .1849
*Model 1b*
	IV	mediator	DV	IV β	Mediator β	Age β	Gender β
Path c	NA	−	MW	.338***	−	.001	−.018
Path a	NA	PSQI Global	−	.371***	−	.048	.035
Paths b and c’	NA	PSQI Global	MW	.220***	.316***	−.014	−.029
Final Model: R = .448; adjusted R² = .188; F(4, 265) = 16.600; Indirect effect (a ^* b): bias corrected 95% C.I. = .0667 to .1985
*Model 2a*
	IV	mediator	DV	IV β	Mediator β	Age β	Gender β
Path c	DF	−	NA	.407***	−	.165**	.024
Path a	DF	PSQI Global	−	.347***	−	.102	.06
Paths b and c’	DF	PSQI Global	NA	.320***	.252***	.140^*	.009
Final model: R = .503; adjusted R² = .242; F(4, 265) = 22.441; Indirect effect (a ^* b): bias corrected 95% C.I. = .0322 to .1267
*Model 2b*
	IV	mediator	DV	IV β	Mediator β	Age β	Gender β
Path c	MW	−	NA	.328***	−	.161**	−.002
Path a	MW	PSQI Global	−	.393***	−	.091	.04
Paths b and c’	MW	PSQI Global	NA	.219***	.277***	.135^*	−.013
Final model: R = .452; adjusted R² = .192; F(4, 265) = 17.018; Indirect effect (a ^* b): bias corrected 95% C.I. = .0525 to.1716

NA = Negative Affect; DF = Daydream Frequency; PSQI Global = PSQI Global score; MW = Mind Wandering.

^†

Taking account of the difference between the initial and the mean indirect effect estimates.

*p≤.05; **p≤.01; ***p≤.0005.