Reliability means consistency
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Internal Reliability
Outside of the test, what can we replicate? Would we get the same results again?
External Reliability
Within the test itself, what has been kept consistent? The same for all participants?
Split-half
Where a test is split into two and each half is compared to each other to check for consistency.
Inter-rater
Where two or more researchers gain consistent results and agree on the findings.
Test-retest
Where a test can be replicated and the same result can be found.
Outside of the test, what can we replicate? Would we get the same results again?
External Reliability
Within the test itself, what has been kept consistent? The same for all participants?
Split-half
Where a test is split into two and each half is compared to each other to check for consistency.
Inter-rater
Where two or more researchers gain consistent results and agree on the findings.
Test-retest
Where a test can be replicated and the same result can be found.
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Validity means true / truth
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Internal Validity
Within the test itself, does everything appear to be measuring what it intends to measure?
External Validity
Outside of the test, do the results hold true? Can they be applied in alternative settings? Or with alternative people?
Face Validity
On the surface does the test appear to be measuring what it intends to measure?
Construct Validity
The degree to which everything in the test is measuring what it claims to measure.
Concurrent Validity
Where the test is measured against a pre-existing standardised and established test.
Criterion Validity
How well one variable predicts another variable of future performance?
Population Validity
Do the results from the sample hold true if compared to the target population?
Ecological Validity
Do the results from the original setting of the study hold true in alterative settings, e.g. real-life?
Temporal Validity
Can the results be applied to different times and places?
Within the test itself, does everything appear to be measuring what it intends to measure?
External Validity
Outside of the test, do the results hold true? Can they be applied in alternative settings? Or with alternative people?
Face Validity
On the surface does the test appear to be measuring what it intends to measure?
Construct Validity
The degree to which everything in the test is measuring what it claims to measure.
Concurrent Validity
Where the test is measured against a pre-existing standardised and established test.
Criterion Validity
How well one variable predicts another variable of future performance?
Population Validity
Do the results from the sample hold true if compared to the target population?
Ecological Validity
Do the results from the original setting of the study hold true in alterative settings, e.g. real-life?
Temporal Validity
Can the results be applied to different times and places?
