Mark scheme

Examiner's comment
The most common successful responses made references to problems such as the artificial environment not reflecting real life. Reference to the Hawthorne effect was also quite common. The most common reason not to get full marks was stating a problem without any explanation (for example ‘lacks validity’) or making references to general problems with research methods that are not specific to laboratory experiments, such as time and money.
Notes from the mark scheme and report
- 2 marks for each of two problems clearly outlined, 1 if partial
- mark scheme misprint says 'advantage' for the partial mark
- common answers: artificial setting not like real life, Hawthorne effect
- stating 'lacks validity' without explanation or giving general problems such as time and money not specific to lab experiments loses marks




















