Estimating Norms by Item Sampling
- Author(s):
- Lord, Frederic M.
- Publication Year:
- 1961
- Report Number:
- RB-61-02
- Source:
- ETS Research Bulletin
- Document Type:
- Report
- Page Count:
- 13
- Subject/Key Words:
- Item Sampling, Test Construction, Test Items, Test Length, Test Norms
Abstract
If a 70-item test is to be normed for a norms population of 1,000 individuals, is it better to give the entire test to a sample of 100 individuals, or to give different samples of 7 items to each of the 1,000 individuals? When tried out on actual data, the latter, "item-sampling" method was found to provide an estimate of the "true" norms distribution slightly superior to that obtainable in the majority of cases by the former method.
Read More
- Request Copy (specify title and report number, if any)
- http://dx.doi.org/10.1002/j.2333-8504.1961.tb00103.x