Marcus has been asked to take part in a longitudinal study of the relationship between fathers with obsessive-compulsive disorder (OCD) and obsessive-compulsive tendencies in their offspring.
Describe an appropriate sampling technique for this longitudinal study looking at the relationship between fathers and their offspring in relation to obsessive-compulsive disorder (OCD).
82 exam-style questions on Edexcel A Level Psychology Research methods and skills, covering Research methods and skills. Each one has a worked solution and a mark scheme showing where the marks go.