What is split-half method reliability?
Split-half reliability is a statistical method used to measure the consistency of the scores of a test. As can be inferred from its name, the method involves splitting a test into halves and correlating examinees’ scores on the two halves of the test.
What is the main problem with the split-half method of assessing reliability?
Because the many ways of splitting a test can produce varying estimates of reliability, there is no single value that can be taken as the split-half estimate of reliability. A second problem with spilt-half reliability is that it does not account for measurement error unique to a single testing occasion.
What is the split-half method in psychology?
The split-half method assesses the internal consistency of a test, such as psychometric tests and questionnaires. There, it measures the extent to which all parts of the test contribute equally to what is being measured. This is done by comparing the results of one half of a test with the results from the other half.
How do you do the split-half method?
One popular way to measure internal consistency is to use split-half reliability, which is a technique that involves the following steps:
- Split a test into two halves.
- Administer each half to the same individual.
- Repeat for a large group of individuals.
- Find the correlation between the scores for both halves.
How is the split half method used in psychology?
The split-half method assesses the internal consistency of a test, such as psychometric tests and questionnaires. There, it measures the extent to which all parts of the test contribute equally to what is being measured. This is done by comparing the results of one half of a test with the results from the other half.
When to use the split half reliability method?
The split-half reliability method is an easy method to carry out if you want to measure internal consistency, but it should only be used if the following two conditions are present: 1. The test has a large number of questions.
When was the split half congeneric reliability published?
Angoff (1953) and Feldt (1975) published the split-half congeneric reliability assuming that the length of each split-half was proportional to the sum of the variances and covariances. The name Spearman-Brown seems to imply a partnership, but the two authors were competitive.
How to split a math test in half?
1 Split the test in half based on odd-numbered and even-numbered questions. 2 Administer each half of the test to the same individual. 3 Repeat for 50 individuals. 4 Find the correlation between the scores for both halves.