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



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


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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