A researcher investigated the relationship between weekly dietary sugar intake (in grams) and cognitive focus. A sample of 40 university students were asked to keep a retrospective food diary at the end of each week, writing down every sugary snack and beverage consumed and estimating the total sugar content in grams. The researcher also measured each student's cognitive focus using a computerized reaction-time test in a controlled lab environment. The findings showed a significant negative correlation between estimated weekly sugar intake and cognitive focus. A health website published these findings under the headline: 'Sugar completely ruins your concentration'.
Explain one problem with the method used to determine the weekly sugar intake. Suggest an alternative measure that would overcome this problem.
Practise AQA A Level Psychology Self-report techniques with exam-style questions for A Level Psychology. 40 questions, matched to the AQA A Level Psychology (7182) 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.