Test Speededness and Time Limits

Authored by: Wim J. van der Linden

Handbook of Item Response Theory

Print publication date:  December  2017
Online publication date:  December  2017

Print ISBN: 9781466514331
eBook ISBN: 9781315117430
Adobe ISBN:


 Download Chapter



A common distinction in educational and psychological testing is the one between speed and power tests. The classical definitions of both types of tests are due to Gulliksen (1950, Chapter 17), who suggested using both the difficulty of the items and the presence of a time limit as criteria. According to his definitions, a speed test would be a test with items easy enough to answer each of them correctly but a time limit that guaranteed that none of the test takers could answer all of them. On the other hand, a power test would have a fixed number of items of increasing difficulty but no time limit. The two types of tests were supposed to be scored differently. For speed tests, the number of items completed within the time limit was assumed to be a proper score, while power tests were assumed to be scored by the number of correct answers. Gulliksen also presented an alternative score for speed tests: the time used to complete a predetermined number of items. Although less practical in the context of paper-and-pencil testing, the alternative was assumed to be entirely equivalent to the number of items completed for the given time limit; that is, except for random error, both were supposed to rank the same set of test takers identically.

Search for more...
Back to top

Use of cookies on this website

We are using cookies to provide statistics that help us give you the best experience of our site. You can find out more in our Privacy Policy. By continuing to use the site you are agreeing to our use of cookies.