Table 1.

Descriptive statistics of the early family factors.

Measures	Range	Mean	S. D.
Mother’s education	2-7	4.5	1.1
Father’s education	3-7	4.7	1.1
Mother’s income	1-6	3.8	1.5
Father’s income	1-6	4.7	1.1
Number of adults' books at home	1-6	4.8	1.5
Number of children's books at home	1-6	4.2	1.2
Parents' reading frequency per week	1-5	4.5	1.1
Parents' reading frequency per day	1-6	3.1	1.1
Storybook reading age	1-6	4.6	1.2
Character teaching age	1-6	4.0	1.0