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. Author manuscript; available in PMC: 2014 Mar 13.
Published in final edited form as: J Nurs Meas. 2013;21(1):96–109. doi: 10.1891/1061-3749.21.1.96

Table 1.

Eigenvalues and Sums of Squared Loadings from Factor Analysis of all 28 Items (Principal Axis Factoring, Oblique Rotation, Delta = 0)

Initial Eigenvalues
 Extraction Sum of
Squared Loadings
 Rotation Sums
of Squared
Loadingsa
Factor Total % of
Variance		 Cumulative
%		 Total % of
Variance		 Cumulative
%		 Total
1 13.56 48.44 48.44 13.25 47.31 47.31 12.20
2 2.38 8.49 56.93 2.06 7.36 54.67 3.10
3 1.86 6.63 63.56 1.43 5.10 59.77 4.61
4 1.14 4.06 67.62 0.74 2.63 62.40 7.84

Note. Eigenvalues for all remaining factors were less than 1. Extraction Method: Principal Axis Factoring, n = 149. Kaiser-Meyer-Olkin Measure of Sampling Adequacy, 0.926. Bartlett’s Test of Sphericity; approximate chi-square 3624.534, df = 378, p < 0.001. Velicer’s MAP test indicated the number of components was 3. Parallel analysis indicated the number of components to be 4.

a

When factors are correlated, sums of squared loadings cannot be added to obtain a total variance.