What is Reliability?
The ability of an instrument to maintain its dependability or consistency over time or between things.
Test-Retest Reliability
It is a measure of the consistency of test results when the same test is given to the same person twice, separated by a certain amount of time, and utilizing the same testing tools and settings in both cases. The real score and the test's stability are then calculated using the two scores.
This class is used for properties that are unlikely to change within the specified time period.
Inter-Rater Reliability
It is a metric that assesses the consistency of the test assessors' scoring. It's crucial since not everyone will see and interpret the responses in the same manner, therefore the accuracy of the answers will vary depending on who's analyzing them. This aids in the refinement and elimination of any inaccuracies created by the evaluator's subjectivity.
Spilt-Half Reliability
It divides the questions that investigate the same concept into two sets of equal proportions, then compares and matches the data from both sets to see whether there is any connection between the two sets of data.
It is a measure of the consistency of test results when the same test is given to the same person twice, separated by a certain amount of time, and utilizing the same testing tools and settings in both cases. The real score and the test's stability are then calculated using the two scores.
This class is used for properties that are unlikely to change within the specified time period.
Inter-Rater Reliability
It is a metric that assesses the consistency of the test assessors' scoring. It's crucial since not everyone will see and interpret the responses in the same manner, therefore the accuracy of the answers will vary depending on who's analyzing them. This aids in the refinement and elimination of any inaccuracies created by the evaluator's subjectivity.
Spilt-Half Reliability
It divides the questions that investigate the same concept into two sets of equal proportions, then compares and matches the data from both sets to see whether there is any connection between the two sets of data.
What is Validity?
The degree to which an instrument measures what it was supposed to assess; the quality of a test.
Criterion-related Validity
It examines the relationship between the results of a construct test and the results of pre-determined tests that look at the specific criteria that make up the overall construct. In other words, if a concept contains three criteria, the test results are linked with the results of tests for each of the three criteria that have already been confirmed as legitimate.
Predictive Validity
It refers to the degree to which the findings of one exam correspond with those of a comparable test that will be given at a later date. The gap in time between the two tests' administrations permits the connection to be predictive.
Concurrent Validity
It refers to the degree to which the findings of a test correlate well with the results of a related, previously validated test. The two tests are completed at the same time and give a correlation between events that occur in the same time frame (present).
It examines the relationship between the results of a construct test and the results of pre-determined tests that look at the specific criteria that make up the overall construct. In other words, if a concept contains three criteria, the test results are linked with the results of tests for each of the three criteria that have already been confirmed as legitimate.
Predictive Validity
It refers to the degree to which the findings of one exam correspond with those of a comparable test that will be given at a later date. The gap in time between the two tests' administrations permits the connection to be predictive.
Concurrent Validity
It refers to the degree to which the findings of a test correlate well with the results of a related, previously validated test. The two tests are completed at the same time and give a correlation between events that occur in the same time frame (present).
Reliability vs Validity
Reliability
Consistency of the test results.
Measures whether the test gives consistent results at its outcome.
There are two types as internal reliability and external reliability.
Consistency of the test results.
Measures whether the test gives consistent results at its outcome.
There are two types as internal reliability and external reliability.
Validity
Extent to which a test measures and what it claims to measure.
Measures whether the extent to which the test claims to measure is achieved.
There are two types as internal validity and external validity.
Extent to which a test measures and what it claims to measure.
Measures whether the extent to which the test claims to measure is achieved.
There are two types as internal validity and external validity.