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Initial selection of examiners according to certain criteria. For example: level of intellectual development. mental or physical health status. etc.

A way to attract respondents. allowing to ensure the representativeness of the population studied. and thus a high external validity of the experiment between groups..

Two words that sound the same but have different meanings. Terms that have different meanings for different theories. as well as scientific terms and ordinary.

The experimental design of the independent variable.

The property of knowledge that ensures its availability for verification in the scientific method. It is achieved by developing a coordinated approach among specialists regarding.