RM - re sit

• Write a suitable hypothesis for this investigation

  As the age of the patient increases (in years) the accuracy of recall of medical advice decreases on a scale of 1-10 (1=lowest, 10=highest)
• what is meant by reliability?

  how consistent the results are
• explain how the psychologists might have assessed the reliability of their ratings

  Using 2 separate psychologists to rate the typed accounts for accuracy and comparing the ratings to see how similar they are
• The study collected both qualitative and quantitative data. From the description of the study above, identify the qualitative data and the quantitative data (2)

  • the qualitative data = the accuracy of the accounts on a scale of 1-10
  • the qualitative data = the patients responses to the questions in the interview
• Explain what is meant be a type || error in the context of the study (2)

  A false negative - concluded that there was no significant difference in stress levels between running 2km as opposed to not running
• Suggest one way the psychologist could reduce the chance of a type || error (1)

  increase the sample size
• Identify an appropriate statistical test that the researcher could use to analyse the social behaviour scores in this study. Explain three reasons for your choice in the context of this study. (Total 7 marks)

  • Mann-Whitney
  • Testing the difference - between the social behaviours of children of working parents compared to stay at home parents
  • independent groups design - as the children are either of working parents or stay at home parents
  • ordinal data - social behaviour score