Which statement about cross-group comparisons is true when measurement invariance is established?

• A. Comparisons are valid across groups.
• B. Comparisons remain invalid.
• C. Invariance has no effect on comparisons.
• D. It only applies to language translation.

Answer: (A)

Establishing measurement invariance means the measurement model works the same across groups. When this holds, items have the same meaning and scale for everyone, so differences in observed scores reflect real differences in the underlying construct rather than artifacts of the measurement process. Because of that, cross-group comparisons are meaningful and interpretable—the latent means, variances, and relationships can be compared with confidence. If invariance isn’t established, any observed differences might be due to how groups respond to items, not true differences in the construct. Invariance isn’t limited to language translation; it applies to any grouping variable and is tested in stages (configural, metric, scalar) to ensure comparability.