Reliability

Question 1

Reliability

Answer 1

A measure of a concept is reliable if it is repeatable or consistent. Applying the same measurement rules to the same case or observation will provide almost identical results.

Question 2

Test - retest reliability

Answer 2

Assesses the stability of a measurement instrument over time. It involves administering the same test to the same group of respondents on two different occasions.

Question 3

Parallel-test reliability

Answer 3

Evaluates the consistency of results when two different, but equivalent forms of a test are administered to the same group of respondents

Question 4

Split-half reliability

Answer 4

Assesses the internal consistency of a test by dividing it into two halves and comparing the scores from each half.

A: randomly assigning the items of one instrument into two questionnaires of the same length

B: randomly assigning individuals
into two groups of the same size

Question 5

Internal-consistency reliability

Answer 5

Measures the extent to which items within a test are consistent in measuring the same construct. It evaluates how closely related the items are as a group

Question 6

Cronbach’s alpha

Answer 6

It is based on pairwise correlations between items. Measure for internal-consistency
reliability. Good from 0.9 - 0.7