LECTURE 7: RELATIONSHIP STATS

Question 1

what stat is used in methodological research?

Answer 1

PEARSON CORRELATION: r
“is there a relationship between 2 variables?”
quantitative/IR data
measures how close values are to best fit line! r=1 (perfect positive)

Question 2

what is the cohen’s d equivalent for relationships?

Answer 2

r 0.1= small
r 0.3 = medium
r 0.5= large

Question 3

what is the coefficient of determination?

Answer 3

r^2 = how much variability in one variable can be predicted by other variable
r=0.2, then r squared= 0.04. 4% of variability in deviceA can be predicted by deviceB

Question 4

pearsons correlation measures ____btwn two variables but not _____

Answer 4

measures association, NOT AGREEMENT

Question 5

what is the non parametric equivalent of Pearson’s correlation?

Answer 5

spearman! rank ordered (ordinal) data
*association btwn ordinal variables

Question 6

how closely related the items in an outcome measure are as a group.

Answer 6

internal consistency

Question 7

calculated from averaging all of the possible pairwise correlations between items…and also it takes into account the number of items and variance too
*measure of internal consistency

Answer 7

Cronbach’s alpha!

Question 8

cronbach’s alpha ranges from __ to ___

Answer 8

0-1
0.7=okay
0.8= good
0.9 = EXCELLENT

Question 9

ICC model 1

Answer 9

each participant assessed by a different set of randomly selected raters (rare)

Question 10

each participant assessed by each rater
raters are random, represent all similar raters (COMMON)

Answer 10

ICC model 2

Question 11

each participant assessed by each rater, but raters are the only raters of interest

Answer 11

ICC model 3

Question 12

form 3 tells you

Answer 12

average of 3 measurements (3 ratings from each rater)

Question 13

ICC model 2 is also called

Answer 13

two way random

Question 13

ICC model 1 is also called

Answer 13

one-way random

Question 14

ICC model 3 is also called

Answer 14

two way mixed