Question

Explain 2 types of reliability:

Include information about how we calculate them

How we use them in test development

How we evaluate test based on them

Answer 1

Two types of reliability:

1) Test-Retest reliability:

Test-Reset reliability evaluates reliability across time.

Reliability can vary with many factors that affect how a person responds to the test, including their mood, interruption,time of a day etc.A good test will largely cope with such factors and give relatively little variation. An unreliable test is highly sensitive to such factors and give widely varying results, even if the person retakes the same test half an hour later.

This method is particularly used in experiments that uese a non treatment control that is measure pre test or post test.

2)parallel forms reliability:

Parellel form reliability evaluates different questions and question sets thet seek to assess the same construct.

Parallel form evaluation may be done in combination of other methods. Such as split-half, which divides item that measure the same constuct into two sets and applies them to the same group of people.