Data losses and exclusions
Due to cases of missing observations and trimming of outliers after model fitting, most analyses were conducted on smaller subsets of the data. Exact sample sizes are reported at the corresponding positions of the results section. Most notably, due to data retrieval problems, the results of the in-game assessments at T2 were lost for 66 children putting the available sample size at 60, 71, and 49 participants for the reading, math, and passive group, respectively.