This repository contains material and supplementary information of the manuscript entitled: "Prosocial influence and opportunistic conformity in young adolescence and young adults" By Gabriele Chierchia, Blanca Piera Pi-Sunyer and Sarah-Jayne Blakemore Institute of Cognitive Neuroscience, University College London The repository contains 4 main folders: ANALYSES. This contains two commented R scripts and two folders: the first script file, ('Modelling.R') contains statistical modeling of our data (including preliminary analyses). The second ('Plots.R') contains the code used to plot the results. The folder ('Markdowns') includes two R markdowns (in 'html' format) that together account for all the data presented in the manuscript: the first ('Main_Models.nb.html') contains the output of the main models and their contrasts, and the second ('Control_and_Reduced_Models.nb.html') presents the omnibus effects across all control and reduced models. The folder (‘Session Info’) contains the session information for the analyses. DATA. This contains a spreadsheet and a pdf. The spreadsheet ('Data.csv') contains raw data and preprocessed variables. The pdf ('Data description.pdf') describes each of the variables in the spreadsheet. STIMULI. This contains two folders. The 'Images' folder contains 123 charity-related images in 'jpeg' format (3 of which used in practice trials and labelled accordingly). The 'Text' folder contains a spreadsheet (in '.csv' format) with 123 descriptors, one for each image. In the task, participants viewed a given image and the corresponding descriptor. TABLES. Here you find a document, 'Estimates tables.pdf', containing 8 tables. Each table includes estimates of the models run in 'Modelling.R'.