Random Flashcards
1
Q
What are the four types of reliability?
A
- test-retest
- alternate forms
- internal consistency: split-half, Kuder-Richardson and Coefficient Alpha
- score reliability
2
Q
What is the formula for error variance?
A
1-rxx
3
Q
What does the Spearman-Brown formula help us do?
A
allows us to look at the effect on reliability of lengthening/shortening the test
4
Q
What is internal consistency?
A
value is equal to the mean value of all possibly split-half coefficients
5
Q
What is the coefficient alpha used for?
A
multiple choice
6
Q
What are split-half reliability coefficients based on?
A
number of errors made, not the speed
7
Q
How high should the rxx be?
A
upwards of .8
