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Research methods and skills

Research methods and skills

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Question 17

A clinical psychologist investigated the efficacy of two different intensive psychotherapeutic approaches for individuals diagnosed with Borderline Personality Disorder (BPD): Schema Therapy (ST) and Dialectical Behaviour Therapy (DBT). After a 12-month treatment cycle, patients' clinical outcomes were classified as either achieving 'Full Remission' or 'Partial/No Remission'. The psychologist wanted to determine whether there was a significant association between the type of therapy administered and the level of clinical remission achieved. The observed data is recorded in Table 1.

Calculate the chi-squared (χ2\chi^2χ2) value for this dataset by completing Table 2. Show your calculations and state your final χ2 \chi^2\,χ2 value to 2 decimal places.

Table 1: Observed frequency of clinical remission by therapy type

Therapy TypeFull RemissionPartial/No Remission
Schema Therapy (ST)3218
Dialectical Behaviour Therapy (DBT)1822

Table 2: Chi-squared calculation template

TherapyRemission LevelObserved (OOO)Expected (EEE)O−EO-EO−E(O−E)2(O-E)^2(O−E)2(O−E)2/E(O-E)^2/E(O−E)2/E
STFull3227.8
Partial/No1822.2
DBTFull1822.2
Partial/No2217.8
χ2\chi^2χ2 =
[4]
Markscheme

Research methods and skills Questions

  1. A Level
  2. /Psychology
  3. /Research methods and skills

82 exam-style questions on Edexcel A Level Psychology Research methods and skills, covering Research methods and skills. Each one has a worked solution and a mark scheme showing where the marks go.

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