A psychologist investigates whether revising in silence or while listening to speech affects the number of words recalled.
Identify the independent variable in this study.
Whether revision takes place in silence or with speech
The number of words recalled
The age of each participant
The length of the word list
64 exam-style questions on Edexcel GCSE Psychology 11.1 Designing psychological research, covering 11.1.1 Identify variables, 11.1.2 Controlling extraneous variables, 11.1.3 Write a null hypothesis, 11.1.4 Write an alternative hypothesis, 11.1.5 Methods of sampling, 11.1.6 Experimental and research designs, 11.1.7 Reliability and validity, 11.1.8 Ethical issues in research, 11.1.9 Laboratory experiment, 11.1.10 Field experiment, 11.1.11 Natural experiment, 11.1.12 Interview, 11.1.13 Questionnaire, 11.1.14 Correlation, 11.1.15 Case study, and 11.1.16 Observation. Each one has a worked solution and a mark scheme showing where the marks go.