Measurement of Change and the Law of Initial Values
A Computer Simulation Study
Bibliographic Data
| ID | 20285083 |
|---|---|
| Authors | John Jamieson (Lakehead University, corresponding author) |
| Year | 1995 |
| Volume | 55 |
| Issue | 1 |
| Pages | 38-46 |
| Publication date | 1995-02-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Educational and Psychological Measurement (JOURNAL) |
| Journal identifiers | ISSN: 0013-1644 • E-ISSN: 1552-3888 |
| Publisher | SAGE Publications (PUBLISHER • US) |
| DOI | 10.1177/0013164495055001004 |
| OpenAlex | W2125179194 |
| Language | EN |
| Citations received | 6 |
| References cited | 11 |
Computer simulations were used to examine the effect of a negative correlation between baseline and change on two measures of change: gain scores and covariance. When a negative correlation resulted from decreasing variance from pretest to posttest, as might be due to the presence of floors or ceilings (the Law of Initial Values) or skewness, gain scores were less powerful than covariance. However, when a negative correlation resulted from measurement error alone, the relative power of gain scores and covariance was unaffected. It was concluded that the correlation between baseline and change, by itself, does not invalidate the use of gain scores. However, when the negative correlation is accompanied by a decrease in variance from pretest to posttest, covariance is a superior index of change
Analysis of covariance · Analysis of variance · Correlation · Covariance · Skewness · Statistics · Variance (accounting) · Housing Market and Economics · Mathematics · Psychology · School Choice and Performance · Urban, Neighborhood, and Segregation Studies
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The Reliability and Specificity of Delta Versus Residualized Change as Measures of Cardiovascular Reactivity to Behavioral Challenges
Comparing the Reliability of Difference Scores and Residuals in Analysis of Covariance
Adjusting for differential base rates
"How we should measure "change
Toward a reconceptualization of the law of initial value
The Advanced Theory of Statistics
| Unique citing works | 6 |
|---|---|
| Citations per year | 0,23 |
| Citation span | 2000 - 2019 (20) |
| Citation velocity | historical |
| Highly cited | No |
| Citation types | Neutral: 6 |