Reliability

1. Test-Retest Reliability - a test is administered twice but at different times. This reliability assumes no change is made to what is being measured. Both sets of scores are taken to find the correlation between the two.

2. Alternate Form Relaibility - when two tests are scored by a group of people. Both tests must have the same type criteria and administered under same conditions. A major problem with this type of reliability is it is hard to have one good test let alone two.

3. Internal Consistency Reliabiltiy - used to measure items on the same test. Comparing test items that measure the same items to determine the tests internal consistency is basically what this type of reliability refers to. If there are two questions that are similar, the test taker should answer each question the same and this would indicate the test has internal consistency.