NotesFAQContact Us
Collection
Advanced
Search Tips
Publication Date
In 20250
Since 20240
Since 2021 (last 5 years)0
Since 2016 (last 10 years)1
Since 2006 (last 20 years)1
Descriptor
Effect Size1
Mathematics Tests1
Misconceptions1
Outcome Measures1
Randomized Controlled Trials1
Research Design1
Research Problems1
Statistical Bias1
Time1
Source
Educational Research and…1
Author
Simpson, Adrian1
Publication Type
Journal Articles1
Reports - Evaluative1
Education Level
Audience
Location
Laws, Policies, & Programs
Assessments and Surveys
What Works Clearinghouse Rating
Showing one result Save | Export
Unmasking the Unasked: Correcting the Record about Assessor Masking as an Explanation for Effect Size Differences
Peer reviewed Peer reviewed
Direct linkDirect link
Simpson, Adrian – Educational Research and Evaluation, 2018
Ainsworth et al.'s paper "Sources of Bias in Outcome Assessment in Randomised Controlled Trials: A Case Study" examines alternative accounts for a large difference in effect size between 2 outcomes in the same intervention evaluation. It argues that the probable explanation relates to masking: Only one outcome measure was administered by…
Descriptors: Statistical Bias, Randomized Controlled Trials, Effect Size, Outcome Measures