Final answer:
The equivalent form estimate measures reliability by administering two different yet comparable tests to compare the test scores.
Step-by-step explanation:
The measure that compares two different yet comparable tests to assess reliability is called the equivalent form estimate.
Equivalent form estimate is a method of estimating reliability by administering two different forms of a test to the same individuals and comparing the scores obtained. This helps determine if the two forms yield consistent results, indicating that the test is reliable.
For example, if a group of students is given a math test in two different formats (such as test A and test B), and their scores on both tests are highly correlated, then the equivalent form estimate suggests that the test is reliable and can produce consistent results.