The quantitative predictor was childcare quality, assessing more attentive, stimulating, and affectionate care and was derived from observational coding do neat five times between child ages of 6 and 54 months. Sample statistics on childcare quality were: M = 2.83, SD = 0.24, Mdn = 2.82, and range 2.10 – 3.38. Children with a DRD4 7-repeat (M = 2.87, SD = 0.24) did not differ significantly on childcare quality from children without a 7-repeat (M = 2.82, SD = 0.24), in either mean level, t (439) = 1.74, p = .08, or variability, F (345, 94) = 1.03, p = .87.
