Dr. Vance conducted an investigation to evaluate the effectiveness of a new virtual reality (VR) spatial training program for surgical interns. He measured the spatial reasoning performance of a group of 15 interns before they underwent the VR training, and then measured the spatial reasoning performance of the same 15 interns after they had completed the two-week training program.
Identify the experimental design used in this investigation.
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.