The efficacy of early intervention programs for children with organic impairment

A quantitative review

Kenneth Ottenbacher, Paul Petersen

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The results of studies examining the effectiveness of early intervention for infants and children with organic impairment and developmental delay were reviewed using recently developed quantitative methods that treat the literature review process as a unique type of scientific inquiry. Thirty-eight studies meeting certain predetermined criteria were included in the review. The 38 studies contained a total of 118 statistical hypothesis tests that evaluated the effectiveness of early intervention. An analysis of these tests based on the calculation of effect sizes revealed that subjects receiving early intervention performed better on a wide range of dependent measures than subjects not receiving intervention. The outcomes were found to be related to several design and study characteristics. Larger effect sizes were associated with preexperimental designs, and also with studies in which the internal validity was rated as poor. Several other design variables such as how subjects were assigned to conditions and how the dependent measure was recorded were related to study outcome as measured by effect size. The conclusion was made that an accurate interpretation of the early intervention research literature cannot be made without consideration of specific design variables and study characteristics.

Original languageEnglish (US)
Pages (from-to)135-146
Number of pages12
JournalEvaluation and Program Planning
Volume8
Issue number2
DOIs
StatePublished - 1985
Externally publishedYes

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Outcome Assessment (Health Care)
Research
literature review
quantitative method
infant
programme
Early intervention
Efficacy
Impairment
interpretation
effect
Effect size
test
literature

ASJC Scopus subject areas

  • Business and International Management
  • Strategy and Management
  • Public Health, Environmental and Occupational Health
  • Social Psychology
  • Education
  • Sociology and Political Science

Cite this

The efficacy of early intervention programs for children with organic impairment : A quantitative review. / Ottenbacher, Kenneth; Petersen, Paul.

In: Evaluation and Program Planning, Vol. 8, No. 2, 1985, p. 135-146.

Research output: Contribution to journalArticle

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