Question

A study was conducted to evaluate the effects of weights on postural hand tremor related to self-feeding in individuals with Parkinson’s disease. Each of the 16 subjects in the study had tremor amplitude measured (in mm) under three conditions: holding a built-up spoon (108g), holding a weighted spoon (248 g), and holding the built- up spoon while wearing a wrist cuff (470g). Can one conclude on the basis of these data that the three experimental conditions, on average, have different effects on tremor amplitude?

a. How many within subject factors are included in this study?

b. What is the dependent variable in this study?

c. Based on the description, what null hypothesis would we be interested in testing in this study?

Answer 1