R scripts for Bayesian and Frequentist Individual Patient Data Meta-analysis clinical studies evaluating Cognitive Bias Modification interventions for alcohol and tobacco use disorders (Boffo et al., in press). MABias, MAReduction and MARelapse are the R codes for each of the three outcomes of the frequentist IPD meta-analysis. All instructions regarding packages, models and functions are included in the scripts. Due to confidentiality and sensible nature of the collected data, the dataframes created for the analyses cannot be shared open access and are available only upon request. The dataframes are solely usable to reproduce the results of the current meta-analysis or to update the meta-analysis to include additional studies published after May 2016. The dataframes will be provided solely under the condition that they cannot be distributed to other parties nor shared open access. For more information about the single studies or to access the individual raw datasets please contact the authors of the included studies.