The Observer has compiled a list of 2025 guides, tutorials, and manuals designed to support psychological scientists as they expand their toolboxes of research practices and methods.

This is a preview. Log in through your library . Abstract Multilevel modeling is an increasingly popular technique for analyzing hierarchical data. This article ...

The gallery is a database of (mostly) published journal articles which fit multilevel models. It is searchable by model type and substantive area. We hope that this will prove useful for teachers and ...

The challenge and pleasures of studying child and adolescent peer experiences come from the complexity and the significance of these relationships for development in childhood and adolescence. In ...

This was a two-year research project (June 2003 - May 2005) under the ESRC Research Methods programme. The project involved the development of multilevel simultaneous equations models for the analysis ...

What Is A Hierarchical Models? Hierarchical models, also known as hierarchical statistical models, multilevel models or random-effects models, are tools for analysing data with a nested or grouped ...