This project corresponds to the following paper: McKay, C., Wijeakumar, S., Rafetseder, E., & Shing, Y. L. (2021). Disentangling age and schooling effects on inhibitory control development: An fNIRS investigation. Developmental Science, e13205. doi:10.1111/desc.13205 Here, you will find the following: - For all behavioral and fNIRS data used in the analyses, please refer to document called "Final_Data.xlsx" in the "Data_Files" folder. A description of the variable names used in the data file can be found in the document called "Description". - For the R scripts that were used to analyze the data, please refer to the "R_Scripts" folder. In here, you will find the univariate behavioral script ("Univariate_Behaviour+AA.Rmd"), the bivariate script between CDT behaviour and academic achievement ("Bivariate_Behaviour+AA.Rmd"), the bivariate script between left frontal activation and CDT behaviour ("Bivariate_Lf+Behaviour.Rmd"), the bivariate script between right frontal activation and CDT behaviour ("Bivariate_Rf+Behaviour.Rmd"), the bivariate script between left frontal activation and academic achievement ("Bivariate_Lf+AA.Rmd"), and the bivariate script between right frontal activation and academic achievement ("Bivariate_Rf+AA.Rmd"). For more detailed information regarding the fNIRS pre-processing and analysis, please contact the authors.