... brain to the muscles and limbs. Aim The aim of the experiment is to see if there is a difference in reaction rates between the two variables when they are asked to catch a falling ruler, which is dropped from the same starting point by the experimenter. Alternative hypothesis There will be a significant difference in reaction rates between young and old. Null hypothesis There will be no significant difference in reaction rates between young and old, and difference will be due to chance. Planning Safety precautions that need to be considered before the investigation can take place are making sure that the ruler doesn't fall to the ground and land on any of the participant's feet. It would also be better to use a plastic ruler instead of a wooden one, as the wooden one can cause a scalp and injury your hand. The measurements that I am going to consider are that every ...

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