An investigator recruits 84 volunteers from a university campus to investigate the effect of olfactory cues on cognitive performance. The volunteers are to be split into two equal-sized groups. In the "Peppermint" condition, participants complete a series of complex spatial reasoning puzzles while the room is diffused with peppermint essential oil. In the "Control" condition, participants complete the same puzzles in an identical room with no diffused scent.
Describe a step-by-step procedure the investigator could use to randomly allocate the 84 participants to the two experimental conditions.
201 exam-style questions on OCR A Level Psychology Planning and conducting research. Each one has a worked solution and a mark scheme showing where the marks go.