In 2023, researchers Chen and Patel investigated how workspace temperature affects cognitive productivity during software debugging. They recruited 32 professional developers to participate in their study. In one condition, participants debugged a complex codebase for two hours in a room maintained at a cool temperature of 18∘C18^{\circ}\text{C}18∘C. In the other condition, the same developers debugged a codebase of equivalent complexity for two hours in a room maintained at a warm temperature of 26∘C26^{\circ}\text{C}26∘C. To control for potential learning effects, half of the developers performed the debugging task in the cool room first, while the remaining half performed it in the warm room first.
With reference to the article, identify the experimental design used by Chen and Patel.
644 exam-style questions on OCR A Level Psychology Research methods and techniques. Each one has a worked solution and a mark scheme showing where the marks go.