Planned Missing Data Design 2: Two-Method Measurement

Abstract

In the early stages of developing measures of any construct, the primary objective is to develop a reasonable measure of the construct. Thus, it is common for the early measures of a construct to be a measure that is readily available, often involving a simple self-report, or a relatively noninvasive physical, physiological, or biological approach to measurement. However, the early measures often have construct validity problems that become obvious only as the science of measurement matures for that construct. Overtime, researchers develop better measures of the construct, that is, measures with considerably improved construct validity.