All data and analysis materials to reproduce results from "Ageing increases prosocial motivation for effort" (accepted in Psychological Science). Files 'K_values_2k1b', 'lme_data_PM_young_old_final' and 'PM_debrief_final' contain all the raw data. File 'analysis_code_PM_ageing_OSF' contains R code with comments for running statistical tests reported in the manuscript and 'Reproduce_figures_prosocial_ageing' contains R code for plotting the figures in the manuscript. Please contact Patricia Lockwood (patricia.l.lockwood@gmail.com) and Anthony Gabay (GabayAS@adf.bham.ac.uk) for any questions.