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ERIC Number: ED210290
Record Type: RIE
Publication Date: 1980-Dec
Pages: 53
Abstractor: N/A
Reference Count: 0
An Introduction to the Value-Added Model and its Use in Short Term Impact Assessment.
Bryk, Anthony; Woods, Elinor
This resource book examines the value-added model approach when used in assessing early childhood Title I (ECT-I) programs. The evaluation design must be able to separate program effects from natural maturation. The basic idea behind the value-added model builds on the notion of natural maturation. The major strengths are that it does not require a comparison group or the use of a norm referenced test. The major weaknesses are its usefulness only for the assessment of skills or attributes which show a natural development with age over the duration of the program. Selection procedures may disguise the relationship between age and skill development among a particular group of program participants. Finally, it can require complex statistical calculations. This method attempts to derive a great deal of information from a situation with little data and little external control. The validity of results from the value-added model may be questioned in situations where one wishes to assess the short-term impact of an ECT-I program and the available sample size is relatively small. A possible solution is pooling data across multiple years of the program or across several sites that are implementing similar activities. (DWH)
Publication Type: Guides - Non-Classroom
Education Level: N/A
Audience: N/A
Language: English
Sponsor: Department of Education, Washington, DC.
Authoring Institution: Huron Inst., Cambridge, MA.
Identifiers: Elementary Secondary Education Act Title I; Evaluation Problems; Value Added