Critically Reviewing Measurements

Question 1

Clinically if our measurements are unreliable, do we run the risk of making poor decisions?

Answer 1

Yes

Question 2

What is a ratio scale?

Answer 2

Equal intervals
True zero present
Examples: height, weight

Question 3

What is the interval scale?

Answer 3

Equal intervals
Examples: calendar years, temperature in farenheit

Question 4

What is an ordinal scale?

Answer 4

Rank order, has an inherent order
Examples: sensation (normal, impaired, absent), likert type scale (strongly agree, agree, disagree, strongly disagree)

Question 5

What is a nominal scale?

Answer 5

Ordered but not ranked
Examples: Blood type, handedness, sex, diagnosis code

Question 6

What is a binary scale?

Answer 6

Nominal subscale
Only has 2 choices