a specific, clearly defined, and measurable component of a broader domain. It narrows the scope of a general concept into a focused area that can be reliably measured in clinical research. By defining target domains, researchers ensure that assessments and instruments capture precise aspects of a condition rather than broad, non-specific constructs.
Example
Within the broad domain “Pain,” the target domain “Pain Intensity” refers specifically to the severity of pain. This can be measured with instruments such as a Numerical Rating Scale (NRS) or a Visual Analogue Scale (VAS), allowing for consistent and quantifiable assessments across studies.