1. A theoretical or practical representation of a system or process in which variables are deliberately regulated or constrained to test hypotheses or demonstrate specific outcomes
The scientist used a controlled model to isolate the effects of temperature on plant growth.
O cientista usou um modelo controlado para isolar os efeitos da temperatura no crescimento das plantas.
2. In research and experimentation, a framework where external factors are managed to ensure validity and reproducibility of results
The clinical trial employed a controlled model with a placebo group and a treatment group.
O ensaio clínico utilizou um modelo controlado com um grupo de placebo e um grupo de tratamento.