This study investigates several approaches to modelling the response time a person, which has been given a certain level of support, requires to solve an item. Three different generic models are proposed explaining the involved latent variables and their interactions. The goal of this paper is to present various ways to model the instructional level of support and allow the reader to choose and extend the most suitable model in a particular dataset of interest. For illustrative purposes, the models are implemented within a Bayesian Framework for a specific situation.