Time-Indexed Effect Size for Educational Research and Evaluation: Reinterpreting Program Effects and Achievement Gaps in K–12 Reading and Math
| Autor: | Jeremy D. Finn, Jaekyung Lee, Xiaoyan Liu |
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| Rok vydání: | 2018 |
| Předmět: |
Unit of time
media_common.quotation_subject 05 social sciences Control (management) 050301 education Context (language use) Academic achievement Education Test (assessment) Treatment and control groups Educational research Reading (process) Developmental and Educational Psychology Mathematics education 0503 education media_common |
| Zdroj: | The Journal of Experimental Education. 87:193-213 |
| ISSN: | 1940-0683 0022-0973 |
| DOI: | 10.1080/00220973.2017.1409183 |
| Popis: | Through a synthesis of test publisher norms and national longitudinal data sets, this study provides new national norms of academic growth in K–12 reading and math to help reinterpret conventional effect sizes in time units. We propose d΄, a time-indexed–effect-size metric to estimate how long it would take for an “untreated” control group to reach the treatment group outcome in terms familiar to educators—years/months of schooling. It serves as a supplement to conventional effect-size metrics, such as Cohen's d, by taking into account different amounts of time needed for learning at different ages or grade levels. Through applications to Project STAR small class effects and NAEP racial achievement gaps, we demonstrate how to interpret and use d΄. It is expected to provide a more developmentally appropriate context for interpreting the size of an effect, a step toward bridging the gap between educational research and practice. |
| Databáze: | OpenAIRE |
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