The experimental method is defined as a systematic, empirical approach to research in which the researcher manipulates one or more independent variables (e.g., training load, dietary supplements, psychological intervention) and measures their effect on one or more dependent variables (e.g., maximal oxygen uptake, shooting accuracy, reaction time), while controlling all extraneous variables.
- Core Definition: According to classic research authorities in physical education like Barrow and McGee, experimentation is the ultimate method for testing hypotheses of cause and effect.
- Key Characteristics: Manipulation of the independent variable, random assignment of participants to groups, and rigorous control of extraneous threats to validity.
- Historical Context: Pioneered in biological and psychological laboratories, the experimental approach transitioned into physical education to validate training methodologies, physiological adaptations, and biomechanical principles using precise measurement instruments (e.g., force plates, gas analyzers, goniometers).