A theoretical explanation specifies what a construct means, describing its attributes and relating it to other constructs. For instance, “intelligence” might be described as the general cognitive ability involving reasoning, problem-solving, and learning. Conversely, a concrete specification outlines how a construct will be measured in a particular study. For example, intelligence could be measured by scores on a standardized IQ test like the Wechsler Adult Intelligence Scale (WAIS).
Distinguishing between the theoretical understanding and its practical measurement is critical for research validity and replicability. A well-defined theoretical explanation provides a foundation for developing measurable indicators. Clearly specifying how constructs are measured ensures that other researchers can understand and replicate the study, contributing to the cumulative nature of scientific knowledge. Historically, confusion between theoretical and measured aspects has led to inconsistent findings and difficulties in comparing research outcomes.