StimulusVariablenkontrolle

Stimulus variables are factors that are manipulated or observed in a scientific experiment to understand their effect on a dependent variable. In experimental design, the independent variable is the stimulus that the researcher changes, while the dependent variable is what is measured to see if it is affected by the stimulus. For example, in a study on plant growth, the amount of sunlight (the stimulus variable or independent variable) might be changed, and the height of the plant (the dependent variable) would be measured to see if sunlight affects growth.

Stimulus variables can be qualitative or quantitative. Qualitative stimulus variables represent categories or distinct types, such as different types of fertilizer or different teaching methods. Quantitative stimulus variables represent numerical values that can be measured on a scale, such as temperature, dosage of a drug, or intensity of a light. Researchers carefully control or vary stimulus variables to isolate their impact and draw conclusions about cause-and-effect relationships. Understanding and appropriately manipulating stimulus variables is crucial for the validity and reliability of experimental findings across various scientific disciplines, including psychology, biology, and medicine.