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The GQM – can you see the pattern?

The GQM – can you see the pattern?. Andy Griffiths Dr. Becky Milne University of Portsmouth United Kingdom. The use of questions. Accurate information ‘lifeblood of investigation’ (Stewart, 1985) Negative effect of inappropriate questions established (Loftus &Palmer, 1974)

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The GQM – can you see the pattern?

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  1. The GQM – can you see the pattern? Andy Griffiths Dr. Becky Milne University of Portsmouth United Kingdom

  2. The use of questions • Accurate information ‘lifeblood of investigation’ (Stewart, 1985) • Negative effect of inappropriate questions established (Loftus &Palmer, 1974) • Previous research has ‘scored’ types of questions only • Appropriate question strategy is vital

  3. Open Probing Appropriate yes/no Inappropriate yes/no Leading Multiple Forced choice Opinion /statement Types of question

  4. GQM Time

  5. GQM Time Eachlineallocatedto question type e.g. ‘open’

  6. GQM Time Top 3 lines are appropriate questions Bottom 5 lines are inappropriate questions

  7. GQM Time As each question is asked it is plotted onto the correct line building the ‘question map’

  8. GQM – ASSAULT (SUSPECT) Time

  9. GQM – ASSAULT (SUSPECT) Time 121 questions = 45 minute interview, majority ‘probing’ (3>1)

  10. GQM – ASSAULT (SUSPECT) Time Sequence - open, probe (3), app closed, probe, open, probe(3) etc

  11. GQM – ASSAULT (SUSPECT) Time Majority productive but 27 ‘inappropriate closed’= training need

  12. GQM – MURDER 1 (SUSPECT) 8 17 23 2 6 12 15 21

  13. GQM – MURDER 1 (SUSPECT) 8 17 23 2 6 12 15 21 Question ratio 2>1 (probing /open)

  14. GQM – MURDER 1 (SUSPECT) 8 17 23 2 6 12 15 21 No inappropriate questions

  15. GQM – MURDER 1 (SUSPECT) 8 17 23 2 6 12 15 21 Sequence - open, probing, app closed, probing(3), open, probing(3), open etc

  16. GQM – MURDER 2 21 24 27 29 30 34 36 39 41 Topic – open, probe, app closed, probe, app closed, probe(6), app closed, probe(3) etc

  17. GQM – MURDER 2 21 24 27 29 30 34 36 39 41 Topic question ratio 13>1 (probing/open)

  18. GQM – CHILD ABUSE SUSPECT

  19. GQM – CHILD ABUSE SUSPECT Question ratio - 3>1 probing/open but 3>1 leading/open and 71/121 inappropriate

  20. GQM – CHILD ABUSE SUSPECT Random pattern

  21. GQM – CHILD ABUSE SUSPECT Accuses suspect

  22. GQM – CHILD ABUSE SUSPECT ‘I’ve interviewed this girl and she’s telling the truth’

  23. GQM – CHILD ABUSE SUSPECT 5/11 open questions after accusing the suspect

  24. Conclusions • Scoring of question type frequency is a very basic method of evaluation

  25. Conclusions • Scoring of question type frequency is a very basic method of evaluation • Context of questions is more informative than an isolated definition of one question

  26. Conclusions • Scoring of question type frequency is a very basic method of evaluation • Context of questions is more informative than an isolated definition of one question • Context of questions is more relevant than the number of any one question type

  27. Conclusions • Scoring of question type frequency is a very basic method of evaluation • Context of questions is more informative than an isolated definition of one question • Context of questions is more relevant than the number of any one question type • The GQM identifies patterns of questions associated with both productive and unproductive interviews

  28. The GQM – can you see the pattern? Contact details - andrew.griffiths@sussex.pnn.police.uk becky.milne@port.ac.uk

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