The measurement variables describe how it will be measured by the researcher. The variables can be of two types depending on what actions or behaviors they express or imply. The variables, resulting from the process of operationalization from the theoretical to the empirical plane, are the manifestations of the constructs, and to which they can be assigned values or words that the researcher will relate or contrast. The measurement consists, in the assignment of numbers or words to such empirical indicators, directly or indirectly observed of the objects or facts according to some rules, norms or criteria. This identification of the empirical indicators of the objects and phenomena is what makes the researcher go from the theoretical to the empirical level. This transformation is done through the identification of the properties of the constructs. These concepts are abstract entities that need to be transformed into observable elements for their measurement. This measure suggests that the researcher starts from a model that includes a series of concepts and constructs that are somehow related and that are the expression of the conceptualization that he has of the reality he wishes to study. Let’s explain more carefully what we just said.įor the researcher to carry out his experiment, one of the tasks he must perform is to measure the study variables with appropriate instruments. The measurement puts in relation these three planes: the theoretical, the empirical and the mathematical. So you can understand what we are saying let’s start from the beginning.Ī model like this must have a series of characteristics, such as hypothetical-deductive, that can be materialized, that represent the reality that you want to study and that is done for the purpose of study and research. To make his experiment operative the student must move from the abstract to the concrete. In either case it moves in the world of concepts, constructs and variables. The researcher moves between the world of theory and the world of observation. In contrast, the new drug is the independent variable, which is tested to determine if it has caused a change in the dependent variable.
In this case, the decrease of the symptom is measured and this measurement is a response variable (also called dependent variable). For example, in a trial you can test whether a new drug is effective in reducing a certain symptom of a heart disease. A response variable is a result measured within an assay that can be influenced by other factors.
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