GRE (Graduate Record Examinations) Psychology Measurement and Methodology-Research Designs Study Material (Page 4 of 16)

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Characteristics of Measuring a Test: Usability and Factors Governing Method Selection for Data Collection

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Usability

Another major characteristic of good test besides reliability and validity is the usability or practicability. Numerous practical factors should be considered while test preparation and selection.

  • Test should be of a length that can be administered within stipulated time. Long tests provide high reliability and validity, however, too long or too short test may not be used practically in a classroom setting.
  • Test should be easy to administer.
  • Test should provide clear-c…

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Characteristics of Measuring a Test: Test Construction

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Test Construction

Test construction involves three major steps of test standardization, reliability and validity.

Table 2: Summary of test construction

Summary of Test Construction
Test CharacteristicsHighlights
StandardizationProcess of making uniform and objective testing & scoring procedures to obtain meaningful scores
ReliabilityConsistency of results
Test-Retest ReliabilityCompares scores from repeated testing of same participants with same test e. g. IQ test have high test-retest reliability
Alternate Form ReliabilityCompares scores from alternate forms of the test
Split Half reliabilityCompares scores from different parts of the test e. g. odd vs. even
Inter-item ReliabilityScores degree to which different items measuring the same variable attain consistent results

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