Table 1.

Factor loadings of all home math activity items at age four from the three-factor exploratory factor analysis solution and unimputed item-level descriptive statistics

Variable	Number-Related Play	Educational Materials	Age 4 Mean (SD)	Age 5 Mean (SD)
Counting backwards	.46		2.85 (1.40)	3.70 (1.30)
Sorting objects by shape, size, or color	.56		3.59 (1.29)	3.40 (1.32)
Doing simple sums	.65		2.50 (1.38)	3.68 (1.29)
Measuring ingredients when cooking	.62		2.59 (1.07)	2.63 (1.07)
Being timed	.49		2.78 (1.47)	2.88 (1.40)
Playing with calculators	.41		1.62 (1.03)	1.72 (1.08)
Making collections	.46		2.54 (1.36)	2.63 (1.35)
Using calendars and dates	.58		2.79 (1.43)	3.32 (1.40)
Playing board games with a die or spinner	.63		2.60 (1.22)	2.87 (1.22)
Playing card games	.48		2.28 (1.16)	2.52 (1.22)
Counting objects	.58		4.53 (0.73)	4.37 (0.93)
Math flashcards		.75	1.48 (1.04)	1.92 (1.33)
Playing with number magnets		.56	1.67 (1.16)	1.68 (1.28)
Printing numbers		.59	2.45 (1.34)	3.44 (1.30)
Dot-to-dot activities		.57	2.12 (1.02)	1.95 (1.10)
Doing number activity books		.72	2.30 (1.34)	2.58 (1.31)
Reading number story books		.43	2.75 (1.25)	2.69 (1.42)
Paint-by-number activities		.54	1.57 (0.83)	1.80 (1.02)
Talk about money when shopping	.31	.35	2.28 (1.25)	2.45 (1.21)
Identifying numbers			3.44 (1.37)	3.52 (1.39)
Wearing a watch			1.46 (0.99)	1.53 (1.02)

Note. Loadings below .30 are not shown in the table. Items removed from CFA and composites are shown in italics.