Validity & Reliability in Assessment

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Validity & Reliability in Assessment by Mind Map: Validity & Reliability in Assessment

1. Reliability

1.1. Test-Retest

1.1.1. A test is given twice so a correlation between the two scores can be determined

1.1.1.1. Example: Teachers allow test-overs when a studetn does poorly so they can determine if the student was jsut having a bad day or does not understand the materials tested.

1.2. Alternate Forms

1.2.1. When two equivalent forms of a test are used to estimate the reliability of a test the correlation between the two is determined and used to eliminate problems of memory and practice involved with test-retest.

1.2.1.1. Example: State standardized tests with several versions of the test given to one group of test takers

1.3. Internal Consistency

1.3.1. The items on a test must correlate with one another and the test itself needs to be consistent.

1.3.1.1. Split-Halves

1.3.1.1.1. Each half of the group is assigned only one half of the original test. Then the scores of each half is then compared to determine the correlation.

2. Validity

2.1. Content Validity

2.1.1. Makes sure the test matches the objectives being measured.

2.1.1.1. Ie: relevant to the study material

2.2. Criterion-Related Validity

2.2.1. Concurrent

2.2.1.1. Measures simultaneously a new test with a established test in order to correlate the validity coefficient.

2.2.1.1.1. Example: IQ test

2.2.2. Predictive

2.2.2.1. Measures how well a test predicts some future behavior of the test taker.

2.2.2.1.1. Example: Aptitude tests predict how a student will preform in future settings

2.3. Construct Validity

2.3.1. When the test's relationship to other information corresponds with a theory

2.3.1.1. Ie: A test to determine the aptitude of a chess player in a competition setting