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Statistica Textbook Examples
Computer-Aided Multivariate Analysis by Afifi, Clark and May
Chapter 15: Factor analysis

Page 410 Table 15.7  Varimax rotation, principal component factors for standardized CESD: Scale items

File
  Open - open the depression data set
Statistics
  Multivariate exploratory techniques
    Factor analysis
      Variables - select c1 through c20
        OK
          OK
            "Advanced" tab
              Change the "Max. no. factors" to 4
                OK
                  "Loadings" tab - select varimax normalized from the "Factor loadings" pull-down menu
                    Summary
Factor Loadings (Varimax normalized) (depress.sta)
Extraction: Principal components
(Marked loadings are > .700000)
  Factor 1 Factor 2 Factor 3 Factor 4
C1 0.638 0.145 0.269 0.280
C2 0.773 0.296 0.273 -0.003
C3 0.726 0.054 0.275 0.052
C4 0.630 -0.062 0.168 0.431
C5 0.797 0.172 0.161 0.016
C6 0.624 0.233 -0.018 0.031
C7 0.592 0.157 0.360 0.337
C8 0.092 -0.051 0.109 0.737
C9 0.237 0.033 0.621 0.105
C10 0.557 0.253 0.379 0.184
C11 0.498 0.146 0.408 0.146
C12 0.450 0.389 -0.049 -0.065
C13 0.070 0.505 -0.173 0.535
C14 0.118 0.695 0.180 0.126
C15 0.491 0.418 -0.123 0.089
C16 0.196 0.672 0.263 -0.070
C17 0.270 0.664 0.192 0.000
C18 0.409 0.211 -0.026 0.223
C19 -0.015 0.237 0.746 -0.088
C20 0.358 0.091 0.507 0.429
Expl.Var 4.795 2.379 2.112 1.551
Prp.Totl 0.240 0.119 0.106 0.078 
RESULTS
  "Explained variance" tab
    Communalities

NOTE:  The communalities listed in the last column in the text are shown in the Statistica output in the column entitled "From 4 Factors".

Communalities (depress.sta) Extraction: Principal components Rotation: Varimax normalized
  From 1 Factor From 2 Factors From 3 Factors From 4 Factors Multiple R-Square
C1 0.4070 0.4281 0.5002 0.5784 0.5648
C2 0.5979 0.6854 0.7598 0.7598 0.7267
C3 0.5269 0.5298 0.6055 0.6082 0.5674
C4 0.3966 0.4004 0.4286 0.6141 0.5159
C5 0.6350 0.6646 0.6904 0.6907 0.6383
C6 0.3890 0.4435 0.4439 0.4448 0.3818
C7 0.3499 0.3744 0.5038 0.6173 0.5687
C8 0.0085 0.0111 0.0229 0.5655 0.1490
C9 0.0563 0.0574 0.4429 0.4540 0.3309
C10 0.3104 0.3743 0.5178 0.5516 0.5592
C11 0.2479 0.2694 0.4355 0.4569 0.4158
C12 0.2022 0.3534 0.3558 0.3600 0.2935
C13 0.0049 0.2594 0.2895 0.5760 0.1858
C14 0.0139 0.4975 0.5299 0.5459 0.3270
C15 0.2415 0.4166 0.4317 0.4396 0.3870
C16 0.0385 0.4902 0.5596 0.5646 0.3373
C17 0.0731 0.5141 0.5508 0.5508 0.4397
C18 0.1675 0.2122 0.2129 0.2628 0.2505
C19 0.0002 0.0565 0.6124 0.6202 0.2733
C20 0.1281 0.1363 0.3929 0.5770 0.4741

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