This document discusses the concept of reliability in testing. It defines reliability as giving consistent results across different administrations of a test. It then provides definitions of reliability from various sources that similarly emphasize consistency of measurement. The document goes on to list and briefly describe five common methods used to measure reliability: test-retest method, split-half method, parallel forms method, internal consistency method, and scorer's reliability. It provides a one sentence description of how each method is used to assess reliability.

1. RELIABILITY
By- GURPREET SIDHU
ROLL NO.14
subject- Research

2. FILE TITTLE - RELIABILITY
SUBMITTED TO – DR.SHEERISHPAL SINGH
ASST. PROFFESSOR , Department of education
(CENTRAL UNI OF PUNJAB)
SUBMITTED BY – GURPREET SINGH
ROLL NO. 14
CLASS – M.Ed

3. RELIABILITY
WHAT IS RELIABILITY ???
Giving the same or compatible result in
different experiments, situations, is called
RELIABILITY. So by reliability of a test mean
how dependable, trustworthy or faithful the
test is.

5. DEFINITIONS OF RELIABILITY
• Gronland and Linn: Reliability refers to the
consistency of measurement that is, how
consistent test scores or other evaluation results
are from one measurement to others.
• Anastasi: Reliability refers to the consistency of
scores obtained by the same individuals when re-
examined with the same test on different
occasions or with different sets of equivalent
items or under variable examining conditions.

6. METHODS OF RELIABILITY
• 1. TEST RETEST METHOD
• 2. SPLIT HALF METHOD
• 3. PARALLEL FORMS METHOD
• 4. INTERNAL CONSISTENCY METHOD
• 5. SCORER`S RELIABILITY

7. 1. Test Retest method
Test retest reliability is a measure of
reliability obtained by administering the
same test twice over a period of time to
same group of individuals.

8. 2. Split–half method
• A method of determining the reliability of a
test by dividing the whole test into two
halves and scoring the two halves separately.

9. 3. Parallel Forms Method
• Parallel forms reliability is a measure of
reliability obtained by administering different
versions of an assessment tool (both versions
must contain items that probe the same
construct ,skill,knowledge,base,etc)to the
same group of individuals.

10. 4. Internal consistency method
• Internal consistency reliability is a measure
of how well the items on the test measure
the same construct or idea.