Skip to content

Course home

Scientific processes

Scientific processes

EasyMediumHard
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365
Question 107

Study Description: Blue-Light and Sleep Quality

A cognitive psychologist wanted to investigate whether blocking blue-light before bed affects sleep quality in young adults. Previous research indicated that reducing blue-light exposure before bedtime improves self-reported sleep quality.

The researcher decided to use a repeated measures design with a sample of 25 university students.

  • Condition A: Students used a blue-light filtering app on all digital screens for one hour before going to bed every night for one week.
  • Condition B: Students used their digital devices with normal screen settings for one hour before going to bed every night for a different week.

At the end of each week, students rated their average sleep quality on a scale of 1 to 10 (where 1 represented extremely poor sleep and 10 represented excellent sleep).

Explain why a repeated measures design was more appropriate than an independent groups design in this study.

[2]
Markscheme

Scientific processes Questions

  1. A Level
  2. /Psychology
  3. /Scientific processes

689 exam-style questions on AQA A Level Psychology Scientific processes. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank