Correlates of naptime behaviors in preschool aged children

Figures & data

Table 1 Univariate one-way ANOVA

Predictor variables	Nappers n=44	Transitioners n=41	Resters n=48	Problem nappers n=25	F	Λ
Age in years	57.36 (4.24)	59.56 (3.66)	59.65 (3.53)	59.00 (4.05)	3.33*	0.939
Parent education	4.82 (1.36)	5.57 (1.16)	5.51 (0.96)	4.60 (1.33)	6.02**	0.895
BIA scale	445.17 (11.09)	451.06 (12.16)	451.90 (10.66)	450.39 (10.56)	3.26*	0.940
Sleep duration	10.50 (0.56)	10.76 (0.56)	11.06 (0.56)	11.16 (0.49)	10.84***	0.826
Temperament	2.96 (0.70)	3.16 (0.81)	3.32 (0.81)	3.07 (0.59)	2.15	0.960
Internalizing	2.77 (2.65)	2.39 (2.19)	2.25 (2.19)	3.20 (2.71)	0.94	0.982
Externalizing	5.61 (3.44)	4.77 (4.13)	3.42 (2.99)	5.04 (3.53)	3.18*	0.942

Notes: Λ=Wilk’s Lambda. *p<0.05. **p< 0.01 ***p<0.001. df=3, 145.

Abbreviation: BIA, Brief Intellectual Ability.

Table 2 Discriminant function structure matrix

Predictor	Function 1 Maturation	Function 2 SES	Function 3 Behavioural problems
Sleep duration	0.840*	−0.387	0.019
BIA scale	0.461*	0.171	0.324
Age	0.447*	0.239	0.402
Parent education	0.317	0.802*	−0.110
Externalizing	−0.408	−0.207	0.758*
Temperament	0.347	0.214	−0.406*
Internalizing	−0.090	−0.316	0.334*

Note: Bolded values load onto the respective functions.

Abbreviation: BIA, Brief Intellectual Ability.

Figure 1 Depiction of group centroids on the discriminant functions.