Saira conducted a laboratory experiment to investigate the effect of word length on short-term memory capacity. She used a repeated measures design where 15 undergraduate psychology students from her own university department were asked to recall lists of 5 short words (one syllable) and then 5 long words (four syllables).
Explain one improvement that could be made to Saira's experiment.
186 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.