How to Make Sure Your Test Is Reliable?

Mean Score

• The percentage of test takers at each score level.

• The average score, computed by summing the scores of all test takers and dividing by the number of test takers.

• A measure of the amount of variation in a set of scores.

• A measure of the strength and direction of the relationship between the scores of the same people on two tests.

Correlation

• The percentage of test takers at each score level.

• The average score, computed by summing the scores of all test takers and dividing by the number of test takers.

• A measure of the strength and direction of the relationship between the scores of the same people on two tests.

Content Validity

• It is used to predict the performance of a student.

• that a test of a concept is not highly correlated with other tests that are set to measure theoretically different concepts.

• A test should fairly represent the content of the course or the field of study.

Factors Affecting Validity

• Unclear directions to the students to respond the test.

• Clear statements in the test items.

• appropriate test items for measuring a particular outcome.

• adequate time provided to take the test.

Administration and Scoring

• Cheating by the pupils during testing.

• reliable scoring of essay type answers.

• sufficient time to complete the test.

Factors related to examinee

• Test anxiety of the students.

• Physical state of the pupil.

• inconsistent tendency to follow a certain pattern in responding the items