person 1 places the forearm of their dominant hand across the table w their hand overhanging the edge
person 2 holds a ruler vertically
0 cm mark should be between person 1's thumb & finger
person 2 tells person 1 to prepare to catch the ruler
person 2 drops the ruler at a random time
person 1 has to catch the ruler as quickly as possible
person 2 records measurement on the ruler that is level w the top of person 1's thumb
repeat experiment several times & calc mean
use a conversion table to convert the results to a reaction time
switch people & repeat experiment
