Obtain values by using the five assumptions of Classical Theory, four different forms of
reliability, and the facts; a. 2 = T + 2 , and b. XY = X 'Y .
Given X = 10 and E = 2, what is T? T = X E = 10 2 =
Factor Analytic Approach to Reliability
- Relationship to Coefficient
If we assume that all the items have the same , i.e., the same
factor loading or item discrimination power,
m 2 2 m 2 T
The estimate of 2T is the
Reliability = Indicator of how consistently (precisely) the test
measures the psychological construct.
Consistency of test results from one administration of the
test to another administration (test-retest reliability).
Consistency of rando