When a test developer uses the sequential system approach, groups of correlated items are identified as scales?

The answer is true. In a sequential system approach, if the preliminary test items are selected, testers systematically may inspect results statistically to conclude which items are connected with one another; groups of correlated items are then recognized as scales which are supposed to be comparatively pure measures of definite sizes of mental ability, personality, and etc. The test's value as a valuation instrument that rest on empirical research signifying its consistency and legitimacy.