Margaret calculates the average inter-item correlations for her scale and then uses the Spearman-Brown formula for her final calculations. Margaret is calculating the __________ reliability of the instrument.
A) alternative-form
B) internal-consistency
C) test-retest
D) item-to-item

Question

Quizplus · Accepted Answer

Margaret is calculating internal-consistency reliability by calculating the average inter-item correlations and using the Spearman-Brown formula, which is a commonly used method for assessing internal-consistency reliability. Alternative-form reliability involves administering two different forms of the same test to the same group of individuals, while test-retest reliability involves administering the same test twice to the same group of individuals with a time interval in between. Item-to-item reliability is not a commonly used term in reliability assessment.

Margaret Calculates the Average Inter-Item Correlations for Her Scale and Then