Establishing Construct Validity using a Correlation Matrix with Survey Data

Correlation Matrix –Construct-Related Evidence of Validity

•

•

1


2


3


4


5

These items target

“Reading Efficacy or

Confidence”


6

These items target “Math

Efficacy or Confidence”


7


8


9

Here we have High Inter-Item Correlation for these three items targeting“Reading Efficacy” (.70 or above is considered high)


10

Here we have High Inter-item Correlation for these three items targeting “Math Efficacy”


11

This is evidence of “Convergent Validity” for each of these constructs because the items within each scale are highly correlated


12

Low INTER-Scale Correlation between Scale 1 items and Scale 2 items.


13

This is an example of “Divergent Validity” because the scales diverge from one

another.


14

Meaning, items targeting “Reading Confidence” do not correlate well with

items targeting “Math Confidence”


15

Meaning, items targeting “Reading Confidence” do not correlate well with

items targeting “Math Confidence”

This is what you would expect, since

the items target different traits or

constructs.

Education

Establishing Construct Validity using a Correlation Matrix with Survey Data