Table 7.

Hierarchical Multiple Linear Regression of Expressive Vocabulary Scores in Older Toddlers (18–25 Months, n = 88) Correcting First for Parent Education, Foreign Birth, and Language Proficiency and Child Age at Step 1, Before Entering Frequency of Reading Aloud at Step 2 and Then Intervention Status at Step 3

Expressive Vocabulary in Older Toddlers (n = 88)
CoefficientSEβPAdjustedR2 by Step (Incremental)
Step 1: parental education, foreign birth and language proficiency and child age.001.15
Step 2: days per week parent reads to child3.51.2.31.003.11
Step 3: intervention5.85.5.11.30.01