Chapter 10: Test and Scales

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REAL WORLD RESEARCHSECOND EDITION

• Chapter 10 Test and Scales

Robson, C.(2002) Real World Research

2nd edn. Oxford
Blackwell
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Developing a summated rating (Likert) scale

• Gather together a pool of items that appear to be
  related, to or important to the issue.
• Decide on a response categorization system.
• Ask a large number of respondents to check their
  attitudes to the list of statements.
• Obtain a total score for each respondent.
• Select items for final scale using item
  analysis.

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Developing an equal-appearing interval
(Thurstone) scale

• Collect a large number of statements relating to
  the attitude in question.
• Give the statements to 50-100 judges.
• Find the scale value of each statement.
• Select a number of statements spread evenly along
  the scale.

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Developing a cumulated (Guttman) scale

• Collect a large number of apparently relevant and
  usable statements.
• Administer the statements to a standardization
  group.
• Carry out a scalogram analysis of the
  standardization groups responses.
• Apply the scale to respondents.