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Frequently Asked Questions

Study Sample Diversity

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What is the racial/ethnic and income diversity of study samples in the HomVEE review?

Overall, the high- and moderate-quality impact studies included in the HomVEE review have diverse study samples that include families from a range of racial/ethnic groups and families with low incomes. The majority includes families from multiple racial/ethnic groups and all of the samples include low-income families. More information on study characteristics can be found for each program model report accessed through the Models tab.

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What is the evidence of effectiveness of home visiting models for specific racial/ethnic groups?

Although study samples included in the HomVEE review are quite diverse, most of the high- and moderate-quality impact studies aggregate the results across racial/ethnic groups. Thus, the available evidence does not indicate whether these program models are more or less effective with one group or another. Further, sample sizes of most studies do not provide sufficient statistical power to detect effects for specific racial/ethnic groups. In other words, even if there are sizeable effects of the intervention for a particular racial/ethnic group, these may not be detected because of small sample sizes for that group. HomVEE only reported subgroup results for findings that were replicated in two different analytic samples; replication provides greater confidence that findings were not observed by chance. None of the program models reviewed by HomVEE had subgroup findings for specific racial/ethnic groups that were replicated in two different samples. More information on study characteristics can be found for each program model report accessed through the Models tab.

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Are there any studies specific to American Indian/Alaska Native populations?

In addition to the main HomVEE review, the HomVEE team conducted a review of models that were implemented in tribal communities or included substantial proportions of American Indian Alaska Native families in the study samples. The results of this review are presented in a separate report entitled, “Assessing the Evidence of Effectiveness of Home Visiting Program Models Implemented in Tribal Communities.” This report can be accessed on the Publications tab.

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Were studies in the HomVEE review conducted in both rural and urban communities?

Several of the program models that meet the DHHS criteria for an “evidence-based early childhood home visiting service delivery model” have been studied with families from a mix of urban and rural communities. Results for families from rural and urban areas were aggregated across groups. Thus, the available evidence does not indicate whether these program models are more or less effective with families from rural or urban communities. More information on study characteristics can be found for each program model report accessed through the Models tab.

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