Methods for multilevel SSD via simulation with a focus on improving computational speed. Initially developed for my PhD and subsequently extended (see under Research below).

An interactive web tool to practise counting in multiples. Originally developed whilst volunteering for a primary school’s ‘Maths Mountain’ program which aims to help children become more secure in times tables and number bonds.
The code was written in vanilla JavaScript as a personal learning exercise and more recently updated for ECMAScript 6. It is ‘vanilla’ in the sense of plain, i.e. with no dependence JavaScript frameworks.

PhD Thesis, University of Bristol.
This research considers simulation-based sample size determination (SSD) and power analysis for fixed effects in multilevel regression models with an emphasis on reducing computation time. Conducted in the Centre for Multilevel Modelling at the University of Bristol.

Browne, W. J., Charlton, C. M. J., Price, T., Leckie, G., & Steele, F. (2025). Optimizing the Use of Simulation Methods in Multilevel Sample Size Calculations. Journal of Educational and Behavioral Statistics, 0(0).
DOI: 10.3102/10769986251344939