Problems in Equating Groups in Mental Retardation Research

Stanley, Julian C.

doi:10.1177/002246696700100303

Cited by 14 publications

(4 citation statements)

References 25 publications

(4 reference statements)

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“…Previous attempts to identify accurate predictors of grade in first-year chemistry have considered traditional criteria such as high school grade point average, high school chemistry grade, and mathematics SAT score (9)(10)(11) as well as less traditional predictors such as Piagetian developmental level (72,73). Other studies (14)(15)(16) indicate that traditional variables predict college grades of black students at predominantly black colleges, and at least one study finds that there is a significant relationship between scores on the Nelson-Denny Heading Test and grades of black freshmen college students (17). This trend of successful prediction is broken in two areas, however.…”

mentioning

confidence: 99%

Predictors of first-year chemistry grades for black Americans

Carmichael¹,

Bauer²,

Sevenair³

et al. 1986

J. Chem. Educ.

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confidence: 99%

Predictors of first-year chemistry grades for black Americans

Carmichael¹,

Bauer²,

Sevenair³

et al. 1986

J. Chem. Educ.

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“…Using this approach, in the present illustration, no differences would have been found between Anglo and Negro groups in residual gain scores. Additional technical discussions of this problem may be found in Harris (1963), Stanley (1967), and Thorndike (1942Thorndike ( , 1963.…”

Section: Matching and External Validitymentioning

confidence: 99%

Regression and the Matching Fallacy in Quasi-Experimental Research

Hopkins

1969

J Spec Educ

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Perhaps the most subtle source of invalidity in behavioral research is the elusive phenomenon of regression.Even seasoned researchers have frequently failed to detect its presence; hence, it has spoiled many otherwise good research efforts. Studies of atypical and special groups have probably been the victims of the regression phenomenon more often than those in any other single area of inquiry. A simple statistical truism is that when subjects are selected because they deviate from the mean on some variable, regression will always occur.Many studies on remediation and treatment of the handicapped and other deviant groups follow this pattern : those in greatest &dquo;need&dquo; are selected, a treatment is administered, and a reassessment then follows. For example, suppose all children having IQ scores below 80 were given some special treatment (e.g., glutamic acid) over a period of a year and were then retested. Assume that the time interval, etc., between testing.s was such that there was no practice or carryover effect. If the treatment had absolutely no effect, how would the experimental group fare on the posttest? Assume a

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“…All other approaches represent compromise of one sort or another (Campbell & Stanley. 1966;Hopkins, 1969, which is especially recommended; Lord, 1963Lord, , 1967Stanley, 1967;Werts & Linn, 1970). The major problem in comparing the improvement in nonrandom (mismatched) groups is the tendency for gains to correlate with initial performance.…”

mentioning

confidence: 99%

The Comparison of Intact Groups Using the Analysis of Covariance

Heal

1976

J Spec Educ

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Problems in Equating Groups in Mental Retardation Research

Cited by 14 publications

References 25 publications

Predictors of first-year chemistry grades for black Americans

Predictors of first-year chemistry grades for black Americans

Regression and the Matching Fallacy in Quasi-Experimental Research

The Comparison of Intact Groups Using the Analysis of Covariance

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