A psychologist plans an experiment to investigate whether chewing gum affects pupils' concentration.
Outline the two conditions the psychologist could use for chewing gum.
Outline how the psychologist could record each pupil's concentration as a numerical score.
182 exam-style questions on OCR GCSE Psychology 7.1 Planning Research, covering 7.1.1 Hypotheses, 7.1.2 Variables, 7.1.3 Experimental Designs, 7.1.4 Populations and Sampling, 7.1.5 Ethical issues, and 7.1.6 Dealing with ethical issues and BPS Code. Each one has a worked solution and a mark scheme showing where the marks go.