There are many environmental factors that can affect cognitive performance, and certain aromas are believed to enhance focus. A cognitive psychologist wants to use a laboratory experiment to investigate whether diffusing a rosemary essential oil scent in a room compared to no scent (a neutral baseline) increases the number of words participants can correctly recall from a 30-word list.
Write a null hypothesis for this study.
201 exam-style questions on OCR A Level Psychology Planning and conducting research. Each one has a worked solution and a mark scheme showing where the marks go.