| 来源类型 | Publication |
| Pretest Measures of the Study Outcome and the Elimination of Selection Bias: Evidence from Three Within Study Comparisons | |
| Kelly Hallberg; Thomas D. Cook; Peter M. Steiner; and M. H. Clark | |
| 发表日期 | 2018-04-01 |
| 出版者 | Prevention Science, vol. 19, issue 3 |
| 出版年 | 2018 |
| 语种 | 英语 |
| 概述 | This paper examines how pretest measures of a study outcome reduce selection bias in observational studies in education.", |
| 摘要 | This paper examines how pretest measures of a study outcome reduce selection bias in observational studies in education. The theoretical rationale for privileging pretests in bias control is that they are often highly correlated with the outcome, and in many contexts, they are also highly correlated with the selection process. To examine the pretest’s role in bias reduction, we use the data from two within study comparisons and an especially strong quasi-experiment, each with an educational intervention that seeks to improve achievement. In each study, the pretest measures are consistently highly correlated with post-intervention measures of themselves, but the studies vary the correlation between the pretest and the process of selection into treatment. Across the three datasets with two outcomes each, there are three cases where this correlation is low and three where it is high. A single wave of pretest always reduces bias across the six instances examined, and it eliminates bias in three of them. Adding a second pretest wave eliminates bias in two more instances. However, the pattern of bias elimination does not follow the predicted pattern—that more bias reduction ensues as a function of how highly the pretest is correlated with selection. The findings show that bias is more complexly related to the pretest’s correlation with selection than we hypothesized, and we seek to explain why. |
| URL | https://www.mathematica.org/our-publications-and-findings/publications/pretest-measures-of-the-study-outcome-and-the-elimination-of-selection-bias-evidence-from-three |
| 来源智库 | Mathematica Policy Research (United States) |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/489198 |
| 推荐引用方式 GB/T 7714 | Kelly Hallberg,Thomas D. Cook,Peter M. Steiner,et al. Pretest Measures of the Study Outcome and the Elimination of Selection Bias: Evidence from Three Within Study Comparisons. 2018. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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