An application of techniques to shorten tests and increase validity

John A. Fossum

Research output: Contribution to journalArticlepeer-review


Used 2 methods of item selection against an external criterion to build 2 short tests for selecting programing and computer-maintenance students. The methods were (a) sequential accretion of items so that at each iteration the item selected was the one leading to the largest increase in the correlation between the test and the criterion, and (b) accretion of items in order of their declining item point biserial correlations with the criterion. The items were given to development and cross-validation samples consisting of 99 computer-maintenance and 315 programing students. There was no significant difference in the validity of tests built using either method. Both methods produced tests with cross-valid coefficients higher than the validity of the item pool and both were reasonably resistant to shrinkage. (PsycINFO Database Record (c) 2006 APA, all rights reserved).

Original languageEnglish (US)
Pages (from-to)90-92
Number of pages3
JournalJournal of Applied Psychology
Issue number1
StatePublished - Feb 1973
Externally publishedYes


  • increase validity, selection of computer-maintenance &
  • item selection against external criterion in techniques to shorten tests &
  • programing students


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