Perry Preschool Project

Perry Preschool Project
Dwight Burdette · CC BY 3.0 · source
Name	Perry Preschool Project
Location	Ypsilanti, Michigan
Established	1962
Founders	HighScope; Lawrence J. Schweinhart
Funding	Office of Economic Opportunity
Participants	58 children (initial randomized sample)

Perry Preschool Project

The Perry Preschool Project was an early childhood intervention trial begun in the early 1960s in Ypsilanti, Michigan that tested a preschool curriculum for low-income African American children. The study, associated with HighScope and researchers such as Lawrence J. Schweinhart, produced longitudinal evidence informing debates in United States Senate policy, War on Poverty, and social program evaluation. Its randomized design and multi-decade follow-ups influenced organizations like the Brookings Institution, Rand Corporation, and James J. Heckman's work on human capital.

Background and origins

The project originated amid the War on Poverty initiatives and activities by the Office of Economic Opportunity during the administration of John F. Kennedy and Lyndon B. Johnson. Sponsors included local partners in Washtenaw County, Michigan and researchers linked to HighScope and Northwestern University collaborators. Early program design drew on contemporary work by Jean Piaget, Lev Vygotsky, and practitioners influenced by Maria Montessori and the Head Start program. Initial samples were recruited from neighborhoods near Ypsilanti, Michigan public services and community organizations that cooperated with the project.

Program design and curriculum

The classroom model emphasized child-initiated activity and adult facilitation, integrating principles from HighScope's active learning approach and echoes of Montessori education methods. Weekly home visits and family engagement resembled components found in Parent-Child Interaction Therapy-era practices and programs evaluated by Abt Associates. Curriculum elements referenced developmental theorists such as Jean Piaget and educators like Friedrich Fröbel. Teachers implemented daily lesson plans, documented in program manuals used by training entities including HighScope and later cited by reports from the Carnegie Corporation and Ford Foundation.

Participants and implementation

Participants were primarily African American children identified through referrals in Ypsilanti, Michigan neighborhoods; the randomized trial allocated about 58 children to treatment and control groups, with teachers recruited from local education networks and trained under HighScope protocols. Home visits involved staff from local community agencies and coordinated with welfare offices similar to those in Michigan Department of Health and Human Services operations. Field implementation required collaboration with institutions such as Eastern Michigan University for assessments and with data management support from centers like University of Michigan research units.

Evaluation methodology and key findings

The project's randomized controlled trial design compared program participants with controls on outcomes across childhood, adolescence, and adulthood. Assessments used instruments and benchmarks developed in coordination with researchers affiliated with HighScope, Michigan Department of Education consultants, and longitudinal teams referencing methods from National Longitudinal Surveys and Panel Study of Income Dynamics. Key findings reported lower rates of special education placement, higher high school graduation rates, reduced crime and incarceration (measured against records from Washtenaw County and Michigan Department of Corrections), and higher employment and income measures captured via tax records and surveys linked to Internal Revenue Service data. Analyses by Lawrence J. Schweinhart and collaborators were later reanalyzed and incorporated into meta-analyses by scholars at University of Chicago, Harvard University, and University of Pennsylvania.

Long-term impacts and cost–benefit analysis

Longitudinal follow-ups into participants' 40s and 50s informed cost–benefit estimates comparing program costs to outcomes such as reduced criminal justice expenditures and increased earnings. Economists including James J. Heckman and teams at the RAND Corporation and Brookings Institution used Perry data to model returns to early intervention, noting favorable benefit–cost ratios versus many social programs. Fiscal impacts were calculated using metrics familiar to analysts at Office of Management and Budget reporting, and findings influenced evaluations by Economic Policy Institute and philanthropic funders like the Carnegie Corporation.

Criticisms and methodological debates

Scholars at institutions such as Harvard University, Stanford University, and Yale University raised questions about sample size, external validity, and the generalizability of results from a small, localized cohort. Debates cited issues of attrition, measurement, and inference similar to critiques applied to earlier randomized trials like those in Project Head Start evaluations and discussions in journals edited at National Bureau of Economic Research. Reanalyses explored sensitivity to assumptions, covariance adjustment, and use of administrative records from agencies such as the Internal Revenue Service and Michigan Department of Corrections.

Legacy and influence on policy

The study shaped subsequent early childhood policy and program design, informing initiatives by Head Start, state preschool expansions in Michigan, and advocacy by organizations like The Pew Charitable Trusts and Arnold Ventures. Its methodology influenced randomized trials funded by agencies such as the Institute of Education Sciences and program scaling strategies promoted by Bill & Melinda Gates Foundation and Annie E. Casey Foundation. Academics at University of Michigan, Columbia University, and Princeton University continue to cite the study in debates on human capital, while policymakers in United States Congress and state legislatures reference its findings when drafting legislation and budgets.

Category:Early childhood education studies