If a time limit is long enough to allow test-takers to attempt all items,and if some items are so difficult that no test-taker is able to obtain a perfect score,then the test is referred to as a ________ test.
A) speed
B) power
C) reliable
D) valid

Question

Quizplus · Accepted Answer

The term "power" refers to the ability of a test to detect differences between test-takers' abilities, even at the high end of the ability spectrum. In other words, if some items are so difficult that no test-taker can get them right, this means that the test is able to distinguish between those who have extremely high abilities and those who do not. Therefore, a test with a long enough time limit for all items to be attempted and some very difficult items that prevent perfect scores would be considered a power test. Speed refers to a test that is designed to be completed quickly rather than allowing enough time to attempt all items. Reliability and validity are separate concepts that are not directly related to this definition.

If a Time Limit Is Long Enough to Allow Test-Takers