Invariance Testing in Psychology Invariance testing is a statistical technique to assist researchers in determining the degree of comparability of a measure, which has been used with different groups. When a measure has been modified, translated, or used with people in various cultures, invariance testing can help determine if the same construct is being measured by the changes to the original measure and how people in different groups may understand the items. Invariance testing is important to ensure a measure functions in the same way (measures the same concept) in different groups. Hypothetical Example : A 16-item measure of forgiveness may have been originally written in American English and tested with college samples. The items are translated into four different languages and administered in ten different locations. One thing a researcher can do is examine the psychometric properties in the different samples. They may also consider correlations with other measures. Anot
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