Marcus conducted an investigation into the effectiveness of a new aggression-reduction programme for violent offenders. As part of his research, he compared the self-reported impulsivity scores of the participants before they started the cognitive-behavioural programme with their scores after they completed the final session.
Identify the experimental design Marcus used in this experiment.
Practise Edexcel A Level Psychology Research methods and skills with exam-style questions for A Level Psychology. 657 questions covering Research methods and skills, matched to the Edexcel A Level Psychology (9PS0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
