Types of Reliability parallel form test-retest inter-rater equivalent form

1. EDUCATIONAL
ASSESSMENT
Reliability
Hina Jalal (Ph.D.) @AksEAina

2. Reliability refers to the
consistency of scores obtained
by the same individuals when
re-examined with test on
different occasions, or with
different sets of equivalent items.
Reliability
Hina Jalal (Ph.D.) @AksEAina

3. Typesof Reliability
Hina Jalal (Ph.D.) @AksEAina

4. ⚫ Inter-rater reliability by considering the similarity of
the scores awarded by the two observers.
•
Inter-Rater or Inter-Observer Reliability
Hina Jalal (Ph.D.) @AksEAina

5. ⚫ It is used to judge the consistency of
results across items on the same test.
⚫ We estimate test-retest reliability when
we administer the same test to the same
sample on two different occasions.
⚫ The amount of time allowed between
measures is critical.
⚫ The shorter the time gap, the higher the
correlation; the longer the time gap, the
lower the correlation.
Test-Retest Reliability
Hina Jalal (Ph.D.) @AksEAina

6. ⚫ In split-half reliability we randomly divide all items
that claim to measure the same contents into two
sets.
⚫ The split-half reliability estimate is simply the
correlation between two total scores.
Split-Half Reliability
Hina Jalal (Ph.D.) @AksEAina

7. ⚫ In parallel form reliability we have to create two
different tests from the same contents to measure
the same learning outcomes.
⚫ The correlation between the two parallel forms is
the estimate of reliability.
Parallel-Form Reliability
Hina Jalal (Ph.D.) @AksEAina

8. ● It is the degree to which items on an instrument
are consistent among themselves and with the
instrument as a whole.
Internal ConsistencyReliability
Hina Jalal (Ph.D.) @AksEAina