Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:…construction site visit, site trainings, computer games and simulations, and problem-based learning, Though roleplaying is not a popular pedagogical approach adopted in construction education, it has major benefits and potentials for improving students‟ learning (Bhattacharjee & Ghosh, 2013).
Category: