Clinical researchers investigating therapeutic outcomes often use meta-analyses to compare the effectiveness of Eye Movement Desensitisation and Reprocessing (EMDR) versus Cognitive Behavioural Therapy (CBT) for treating Post-Traumatic Stress Disorder (PTSD) across different veteran populations.
Explain one advantage of using a meta-analysis in this clinical research instead of conducting a single primary research study.
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.