Variance among interviewers in data for the Peabody Picture Vocabulary Test-IIIA.

Variance among interviewers in prior research reflects that answers provided by respondents and recorded on questionnaires varied depending on which interviewer was assigned to the respondent. For scores from the 36-mo. In-Home Longitudinal Study of Pre-School Aged Children, a special module in the Fragile Families and Child Wellbeing Study, variance among interviewers was evident for the Peabody Picture Vocabulary Test-IIIA and clearly affected inferences made from test data. When variance among interviewers was ignored, mothers' perception of neighborhood closeness was significantly related to childrens' standardized PPVT-IIIA scores; however, when variance among interviewers was accounted for statistically, this effect was not significant.