Reliability and Validity

Question 1

ICC model 1

Answer 1

each subject tested by different raters.

*raters random
assess difference among subjects

Question 2

ICC model 2

Answer 2

each subject tested by same raters

*raters and subjects random
assess interrater reliability

Question 3

ICC model 3

Answer 3

each subject tested by same rater

*purposely chosen.
used to measure intrarater reliability.

Question 4

measuring change order

Answer 4

MPDD -> MDD (smallest change that can be interpreted as any inprov. or decline.) -> MCID (meaningful change)

Question 5

Sensitivity

Answer 5

probability of getting a true positive.

a/(a+c)

1-this = false negative rate

Question 6

specificity

Answer 6

probability of getting a true negative.

d/(b+d)

1-this = false positive rate

Question 7

SpPin

Answer 7

high specificity, positive test, rule in

Question 8

SnNout

Answer 8

high sensitivity, negative test, rule out

Question 9

positive likelihood ratio

Answer 9

odds of a disease are increased if a test is positive

true positive rate/false positive rate
sensitivity/ (1- specificity)

Question 10

negative likelihood ratio

Answer 10

odds of a disease are decreased if test is negative

false negative/ true negative
(1-sensitivity) / specificity