MAJIC: Randomized trial of mental abacus training


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Text accompanying preregistration of analysis prior to data collection This preregistration concerns the analysis of data from the MAJIC project, a randomized trial of mental abacus training. Randomization was conducted in fall 2015 at the classroom level. The primary hypothesis of the project is that mental abacus training will improve math outcome measures, consistent with Barner et al. (2016)'s...


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