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Parent-Child Home Program

Public Health & Prevention: Home- or Family-based
  Literature review updated August 2017.
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The Parent-Child Home Program (http://www.parent-child.org/) aims to improve children’s language and literacy skills by enriching parent–child interactions through home visits to low-income families. During each visit, a “toy demonstrator” uses a toy or book to demonstrate verbal interaction techniques and encourage learning through play. In the included study, families with two- and three-year old children received twice weekly visits during the 10-month school year for two years.
META-ANALYSIS
CITATIONS

Meta-analysis is a statistical method to combine the results from separate studies on a program, policy, or topic in order to estimate its effect on an outcome. WSIPP systematically evaluates all credible evaluations we can locate on each topic. The outcomes measured are the types of program impacts that were measured in the research literature (for example, crime or educational attainment). Treatment N represents the total number of individuals or units in the treatment group across the included studies.

An effect size (ES) is a standard metric that summarizes the degree to which a program or policy affects a measured outcome. If the effect size is positive, the outcome increases. If the effect size is negative, the outcome decreases.

Adjusted effect sizes are used to calculate the benefits from our benefit cost model. WSIPP may adjust effect sizes based on methodological characteristics of the study. For example, we may adjust effect sizes when a study has a weak research design or when the program developer is involved in the research. The magnitude of these adjustments varies depending on the topic area.

WSIPP may also adjust the second ES measurement. Research shows the magnitude of some effect sizes decrease over time. For those effect sizes, we estimate outcome-based adjustments which we apply between the first time ES is estimated and the second time ES is estimated. We also report the unadjusted effect size to show the effect sizes before any adjustments have been made. More details about these adjustments can be found in our Technical Documentation.

Meta-Analysis of Program Effects
Outcomes measured No. of effect sizes Treatment N Adjusted effect sizes (ES) and standard errors (SE) used in the benefit-cost analysis Unadjusted effect size (random effects model)
First time ES is estimated Second time ES is estimated
ES SE Age ES SE Age ES p-value
Preschool test scores 1 78 -0.150 0.197 4 n/a n/a n/a -0.150 0.447

Citations Used in the Meta-Analysis

Scarr, S., & McCartney, K. (1988). Far from home: An experimental evaluation of the mother-child home program in Bermuda. Child Development, 59(3), 531-543.

For more information on the methods
used please see our Technical Documentation.
360.664.9800
institute@wsipp.wa.gov