Table 2.
Comparisons between Retained Families and Families Lost to Attrition
Variable | Retained |
Lost to Attrition |
t/-test (df) | P | Cohen’s d | ||
---|---|---|---|---|---|---|---|
Mean | SD | Mean | SD | ||||
Socioeconomic Status | 0.19 | 0.85 | −0.29 | 0.95 | −3.34 (166) | .001 | −0.53 |
Toddler observed inhibited temp T1 | −0.02 | 0.66 | −0.03 | 0.68 | −0.01 (122) | .994 | −0.00 |
Toddler observed inhibited temp T2 | 0.02 | 0.67 | −0.00 | 0.64 | −0.18 (135) | .859 | −0.03 |
Mother-perceived toddler anxiety T1 | 0.62 | 0.33 | 0.63 | 0.29 | 0.16 (111) | .875 | 0.03 |
Mother-perceived toddler anxiety T2 | 0.67 | 0.32 | 0.70 | 0.33 | 0.52 (133) | .604 | 0.10 |
Maternal anxiety T1 | −0.09 | 0.73 | 0.26 | 1.01 | 2.30 (123) | .023 | 0.40 |
Maternal anxiety T2 | −0.04 | 0.85 | 0.23 | 0.86 | 1.66 (141) | .098 | 0.31 |
Note. Socioeconomic status was a composite of Z-scored income and maternal education. Inhibited temperament variables and maternal anxiety variables were means of Z-scored components. Levene’s test for equality of variances was non-significant (p > .05) in all cases. T1 = Time 1. T2 = Time 2. Retained families versus families lost to attrition did not differ according to toddler biological sex (χ2[l] = 0.21, p = .649).