Clinical psychology Practical investigation

Worked examples (9)

• 1Write a sampling frame (4 marks)
• 2Justify the unit of analysis (4 marks)
• 3Repair a faulty coding frame (5 marks)
• 4Classify manifest and latent decisions (4 marks)
• 5Explain the purpose of piloting (3 marks)
• 6Explain coding blind to source (4 marks)
• 7Calculate and interpret inter-rater agreement (5 marks)
• 8Interpret where the disagreements fell (4 marks)
• 9Outline the procedure (6 marks)

Model answers (9)

• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section B style

Worked examples (9)

• 1Explain why one source is not enough (4 marks)
• 2Identify what makes a comparison unfair (5 marks)
• 3List the controls used (4 marks)
• 4Convert the tallies to percentages (4 marks)
• 5Describe the pattern before testing it (4 marks)
• 6State the three limits (5 marks)
• 7Explain what more sources would add (4 marks)
• 8Compare the two designs the specification suggests (5 marks)
• 9Justify your choice of sources (4 marks)

Model answers (9)

• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section B style

Worked examples (9)

• 1Name the four design decisions (4 marks)
• 2Assess the credibility of the sources (5 marks)
• 3Distinguish primary from secondary data (3 marks)
• 4Explain ethics in content and intention (5 marks)
• 5Correct a misconception about ethics (3 marks)
• 6Match each control to what it rules out (5 marks)
• 7Explain how reliability is built in at the design stage (5 marks)
• 8Critique a described design (6 marks)
• 9Justify two of your own decisions (6 marks)

Model answers (9)

• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section B style

Worked examples (9)

• 1Complete the contingency table (4 marks)
• 2Calculate percentages and justify reporting them (4 marks)
• 3Choose and justify the graph (4 marks)
• 4Calculate the expected frequencies (5 marks)
• 5Complete the chi-squared test (6 marks)
• 6Calculate degrees of freedom and explain them (3 marks)
• 7State a conclusion in full (4 marks)
• 8Write the results section (5 marks)
• 9Write the discussion section (6 marks)

Model answers (9)

• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section B style

Worked examples (9)

• 1State strengths with their reasons (4 marks)
• 2Explain the representation/belief gap (5 marks)
• 3Sort weaknesses by whether they can be repaired (5 marks)
• 4Tie an improvement to its weakness (4 marks)
• 5Explain the strongest single improvement (5 marks)
• 6Repair the reliability weakness (4 marks)
• 7Assess a proposed improvement honestly (4 marks)
• 8Improve the ethics of the write-up (4 marks)
• 9Reach a balanced judgement (5 marks)

Model answers (9)

• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section C style
• ✓Model answer — Edexcel WPS04 Section A style
• ✓Model answer — Edexcel WPS04 Section B style