<b>Minimal derivative dataset for REI–RPI framework (Amazon Books Reviews)</b>

This file contains the minimal derivative dataset required to reproduce the REI and RPI indices presented in the manuscript <i>"A Two-Dimensional Framework for Profiling Online Reviewer Behaviour"</i>.<br>The dataset includes cleaned observations and reviewers with at least three ratings.<br>Only the variables strictly necessary for computing the REI and RPI measures are provided (User_id, Title, review/score).The raw Amazon Book Reviews dataset is <b>not included</b>, as it originates from an external public repository (Kaggle – Mohamed Bakhet, 2022) and is not owned by the authors. Users wishing to access the full raw dataset may obtain it directly from the original source:<br>https://www.kaggle.com/datasets/mohamedbakhet/amazon-books-reviews/dataThis derivative dataset is released for the purpose of ensuring reproducibility in compliance with PLOS ONE data policies.