Validity Flashcards
broad concepts or ideas that may describe an observed
phenomenon.
factor
a construct operationally defined by its factor loadings
test construct
correlations of the variables with the factor
factor loadings
the construct defined by its factor loadings, that is by its
correlations with the test items
factors
- These are the factors that emerge from the first factor-analysis of the correlations between the variables.
- The factors account for or explain the variance of the variables
first-order/ primary factors
The square of each factor loading tells us the proportion of variance explained by the factor.
test variance
It is possible to factor-analyze the correlations between primary factors, and the end result is [ ]
second-order factors
there is no a priori method for determining the
position of the factors relative to each other. minimizes the number of factors needed to explain each variable.
rotation
- a factor solution where the factors each have a few high loadings while all the other loadings are as near zero as possible
- pattern of results such that each variable loads highly onto one and only one factor
simple structure
determinant of collinearity should be [ ]
<0.00001
correlations of >.80 should be [ ]
removed
KMO measure of sampling adequacy [ ] is acceptable
> 0.5
bartlett’s test of sphericity sig. value of [ ]
<0.05
items that closely correlate with each other; these items “load together”
pattern matrix
check how many components exceed eigenvalue of 1
screeplot
