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This dataset comprises 1.84 million item responses aggregated from 40 empirical psychometric datasets. It was created by Josh Gilbert for a meta-analysis investigating conditional dependencies between response time and item discrimination. The analysis found a pooled negative coefficient of -0.27% for the relationship between residual response time and item discrimination.
The specific file formats, data schema (columns), and license are unknown. The data is a processed meta-analysis dataset, not the raw source data from the 40 studies.