1. As the work rate of stair climbing increase linearly (with a faster step cadence), the ratings of percieved exertions tended to

a. increase curvelinearly

b. decrease curvelinearly

c. increase linearly

d. remain constant

2. In the study by Williamson about hypnosis, they were able to demonstrate that

a. perception of effort cannot be manipulated by hypnosis because not all people are hynotizable

b. perception of effect can be manipulated by hynosis for a uphill grade (percieved as more effortfull)

c. perception of effect can be manipulated by hynosis only for a downhill grade (percieved as less effortfull)

d. perception of effect can be manipulated by hynosis both uphill grade and a downhill grade