limitations

• A sample size of 15 is very small

  • This means that the researchers are limited as to how generalisable and robust their findings are
• • Generalisability is limited due to the unrepresentative nature of a small sample
• • The robustness of data is limited as small numbers lack statistical power
• • Campbell & Murphy's findings have not been replicated in any subsequent studies
  • If a study cannot be replicated according to a standardised procedure and conditions then it cannot be checked for consistency
  • Not being able to check for consistency of findings means a lack of reliability