INTELLIGENCE

Definition:

The degree to which test scores obtained from subjects at one point in time will agree with test scores obtained from the same group at another point in time.

Example:

Intelligence test scores obtained by a group of subjects in January should agree with their scores obtained in July.

Alternate-Form Reliability

Definition:

The degree to which test scores obtained on one form of a test will agree with scores on an alternate form of the same test.

Example:

Intelligence test scores obtained on form L of the Stanford-Binet should agree with test scores obtained on form M.

Split-Half Reliability

Definition:

The degree to which test scores obtained on one half of a test will agree with test scores on the other half.

Example:

Depression test scores obtained by a group of subjects on the even items should agree with scores on the odd items.

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