Consistent results with intuitive tasks mean there has to be something natural in the method.
Multiple choice or forced alternative tasks are part the classic grammar practice. Results depend on how effective the method is. Methods are effective when they appeal to human minds, and linguistic skills begin to advance at ages as early as in the picture above.
Human grammar has evolved with people speaking and moving about.
Try a mild brainteaser. Compare your answers with family, friends, or other people. The results are likely to be highly consistent, that is, natural.