PSY/CS330 Human Factors
01/11/2001
Day 1-33
Fitt’s Law and Movement Time
uThe index of difficulty (ID)
u
u
u
uA =  amplitude or size of movement
uW = width of target or accuracy required
uFitt's Law
u
u
uMT = Movement time
uID   = Index of difficulty (above)
ua,b = constants