------------------------------------------------------------------------------- log: D:\COURSES\PS552\Stata Do Files\measurement.log log type: text opened on: 3 May 2004, 15:18:20 . . ***************************************************************** . * . * measurement and factor analysis example . * . * Bert Kritzer . * May 3, 2004 . * . ***************************************************************** . # delimit ; delimiter now ; . drop _all ; . use "D:\COURSES\PS551\anes2000\kritzerville2000.dta", clear ; . rename v001306 ft_military ; . rename v001307 ft_fedgov ; . rename v001308 ft_blacks ; . rename v001309 ft_whites ; . rename v001310 ft_conservatives ; . rename v001311 ft_liberals ; . rename v001312 ft_labunion ; . rename v001313 ft_bigbus ; . rename v001314 ft_poorpeople ; . rename v001315 ft_welfarerecipients ; . rename v001316 ft_hispanics ; . rename v001317 ft_christfund ; . rename v001318 ft_womensmovement ; . rename v001319 ft_oldfolks ; . rename v001320 ft_environ ; . rename v001321 ft_homosexuals ; . rename v001322 ft_christcoal ; . rename v001323 ft_catholics ; . rename v001324 ft_jews ; . rename v001325 ft_protestants ; . rename v001326 ft_feminists ; . rename v001327 ft_asianamer ; . alpha ft_conservatives ft_liberals ft_labunion ft_bigbus > ft_feminists ft_christcoal ft_christfund ft_womensmovement, > reverse(ft_liberals ft_labunion ft_feminists ft_womensmovement) > detail item casewise std ; Test scale = mean(standardized items) average item-test item-rest inter-item Item | Obs Sign correlation correlation correlation alpha -------------+----------------------------------------------------------------- ft_conserv~s | 1070 + 0.6123 0.4363 0.1844 0.6128 ft_liberals | 1070 - 0.6441 0.4771 0.1778 0.6021 ft_labunion | 1070 - 0.4636 0.2561 0.2153 0.6576 ft_bigbus | 1070 + 0.4256 0.2125 0.2232 0.6679 ft_feminists | 1070 - 0.5926 0.4116 0.1885 0.6191 ft_christc~l | 1070 + 0.5463 0.3545 0.1981 0.6336 ft_christf~d | 1070 + 0.5405 0.3474 0.1993 0.6354 ft_womensm~t | 1070 - 0.5447 0.3525 0.1984 0.6341 -------------+----------------------------------------------------------------- Test scale | 0.1981 0.6640 ------------------------------------------------------------------------------- Interitem correlations (reverse applied) (obs=1070 in all pairs) ft_conservatives ft_liberals ft_labunion ft_conservatives 1.0000 ft_liberals 0.1680 1.0000 ft_labunion 0.0216 0.4537 1.0000 ft_bigbus 0.4048 -0.0055 -0.0182 ft_feminists 0.0701 0.5796 0.3906 ft_christcoal 0.4915 0.0289 -0.1211 ft_christfund 0.4974 0.0150 -0.0969 ft_womensmovement 0.0219 0.5748 0.3962 ft_bigbus ft_feminists ft_christcoal ft_bigbus 1.0000 ft_feminists -0.0729 1.0000 ft_christcoal 0.3679 -0.0243 1.0000 ft_christfund 0.3320 -0.0234 0.7082 ft_womensmovement -0.1482 0.6698 -0.0638 ft_christfund ft_womensmovement ft_christfund 1.0000 ft_womensmovement -0.0704 1.0000 . alpha ft_conservatives ft_bigbus ft_christcoal ft_christfund, > detail item casewise std ; Test scale = mean(standardized items) average item-test item-rest inter-item Item | Obs Sign correlation correlation correlation alpha -------------+----------------------------------------------------------------- ft_conserv~s | 1126 + 0.7709 0.5752 0.4684 0.7255 ft_bigbus | 1126 + 0.6790 0.4363 0.5632 0.7946 ft_christc~l | 1126 + 0.8276 0.6686 0.4098 0.6757 ft_christf~d | 1126 + 0.8182 0.6525 0.4196 0.6844 -------------+----------------------------------------------------------------- Test scale | 0.4653 0.7768 ------------------------------------------------------------------------------- Interitem correlations (obs=1126 in all pairs) ft_conservatives ft_bigbus ft_christcoal ft_conservatives 1.0000 ft_bigbus 0.4038 1.0000 ft_christcoal 0.4859 0.3691 1.0000 ft_christfund 0.4967 0.3290 0.7071 ft_christfund ft_christfund 1.0000 . alpha ft_conservatives ft_christcoal ft_christfund, > detail item casewise std ; Test scale = mean(standardized items) average item-test item-rest inter-item Item | Obs Sign correlation correlation correlation alpha -------------+----------------------------------------------------------------- ft_conserv~s | 1133 + 0.7866 0.5349 0.7069 0.8283 ft_christc~l | 1133 + 0.8689 0.6911 0.4988 0.6656 ft_christf~d | 1133 + 0.8725 0.6986 0.4896 0.6573 -------------+----------------------------------------------------------------- Test scale | 0.5651 0.7958 ------------------------------------------------------------------------------- Interitem correlations (obs=1133 in all pairs) ft_conservatives ft_christcoal ft_christfund ft_conservatives 1.0000 ft_christcoal 0.4896 1.0000 ft_christfund 0.4988 0.7069 1.0000 . alpha ft_liberals ft_labunion ft_feminists ft_womensmovement, > detail item casewise std ; Test scale = mean(standardized items) average item-test item-rest inter-item Item | Obs Sign correlation correlation correlation alpha -------------+----------------------------------------------------------------- ft_liberals | 1308 + 0.8083 0.6415 0.4834 0.7373 ft_labunion | 1308 + 0.7039 0.4794 0.5935 0.8141 ft_feminists | 1308 + 0.8230 0.6660 0.4679 0.7251 ft_womensm~t | 1308 + 0.8297 0.6771 0.4609 0.7195 -------------+----------------------------------------------------------------- Test scale | 0.5014 0.8009 ------------------------------------------------------------------------------- Interitem correlations (obs=1308 in all pairs) ft_liberals ft_labunion ft_feminists ft_liberals 1.0000 ft_labunion 0.4496 1.0000 ft_feminists 0.5523 0.3807 1.0000 ft_womensmovement 0.5564 0.3976 0.6718 ft_womensmovement ft_womensmovement 1.0000 . alpha ft_liberals ft_feminists ft_womensmovement, > detail item casewise std ; Test scale = mean(standardized items) average item-test item-rest inter-item Item | Obs Sign correlation correlation correlation alpha -------------+----------------------------------------------------------------- ft_liberals | 1338 + 0.8235 0.6067 0.6703 0.8026 ft_feminists | 1338 + 0.8676 0.6924 0.5573 0.7157 ft_womensm~t | 1338 + 0.8698 0.6969 0.5517 0.7111 -------------+----------------------------------------------------------------- Test scale | 0.5931 0.8139 ------------------------------------------------------------------------------- Interitem correlations (obs=1338 in all pairs) ft_liberals ft_feminists ft_womensmovement ft_liberals 1.0000 ft_feminists 0.5517 1.0000 ft_womensmovement 0.5573 0.6703 1.0000 . factor ft_military-ft_asianamer, pcf ; (obs=963) (principal component factors; 4 factors retained) Factor Eigenvalue Difference Proportion Cumulative ------------------------------------------------------------------ 1 7.61767 4.53272 0.3463 0.3463 2 3.08495 1.48946 0.1402 0.4865 3 1.59549 0.51432 0.0725 0.5590 4 1.08116 0.12791 0.0491 0.6081 5 0.95325 0.11583 0.0433 0.6515 6 0.83742 0.11928 0.0381 0.6895 7 0.71814 0.10853 0.0326 0.7222 8 0.60961 0.03753 0.0277 0.7499 9 0.57208 0.00650 0.0260 0.7759 10 0.56558 0.03450 0.0257 0.8016 11 0.53108 0.04377 0.0241 0.8257 12 0.48731 0.01834 0.0222 0.8479 13 0.46898 0.04123 0.0213 0.8692 14 0.42775 0.04343 0.0194 0.8887 15 0.38432 0.00870 0.0175 0.9061 16 0.37562 0.05161 0.0171 0.9232 17 0.32401 0.02481 0.0147 0.9379 18 0.29919 0.01165 0.0136 0.9515 19 0.28754 0.01065 0.0131 0.9646 20 0.27690 0.02196 0.0126 0.9772 21 0.25494 0.00793 0.0116 0.9888 22 0.24701 . 0.0112 1.0000 Factor Loadings Variable | 1 2 3 4 Uniqueness -------------+------------------------------------------------------ ft_military | 0.42063 0.53293 0.06899 -0.18630 0.49958 ft_fedgov | 0.42921 0.00088 0.49394 -0.21247 0.52666 ft_blacks | 0.79800 -0.04845 -0.24755 0.02983 0.29868 ft_whites | 0.70370 0.20556 -0.20125 -0.12313 0.40689 ft_conserv~s | 0.32706 0.65122 0.12445 0.32509 0.34777 ft_liberals | 0.52392 -0.56740 0.26773 0.05246 0.32913 ft_labunion | 0.44507 -0.29369 0.46661 -0.26441 0.42801 ft_bigbus | 0.37757 0.42385 0.19685 0.33052 0.52980 ft_poorpeo~e | 0.71235 0.06476 -0.15609 -0.41409 0.29253 ft_welfare~s | 0.58846 -0.15978 0.09836 -0.09245 0.60997 ft_hispanics | 0.77021 -0.06765 -0.27498 0.12041 0.31209 ft_christf~d | 0.37552 0.58379 0.38265 0.10236 0.36127 ft_womensm~t | 0.61854 -0.41532 0.25288 0.07662 0.37509 ft_oldfolks | 0.64388 0.13490 -0.20110 -0.49688 0.27989 ft_environ | 0.55824 -0.38417 0.18776 -0.05076 0.50296 ft_homosex~s | 0.41439 -0.53734 -0.10980 0.37906 0.38381 ft_christc~l | 0.35282 0.63156 0.39729 0.05167 0.31614 ft_catholics | 0.66019 0.21260 -0.10084 0.05684 0.50555 ft_jews | 0.77577 -0.04639 -0.29234 0.14044 0.29084 ft_protest~s | 0.71880 0.22049 -0.15521 0.12092 0.39600 ft_feminists | 0.50709 -0.49664 0.34568 0.18311 0.34318 ft_asianamer | 0.77329 -0.02777 -0.31063 0.14097 0.28489 . rotate ; (varimax rotation) Rotated Factor Loadings Variable | 1 2 3 4 Uniqueness -------------+------------------------------------------------------ ft_military | 0.25215 0.52703 -0.10428 -0.38497 0.49958 ft_fedgov | -0.00607 0.33192 0.49411 -0.34494 0.52666 ft_blacks | 0.77229 0.09797 0.25432 -0.17497 0.29868 ft_whites | 0.64317 0.24651 0.07026 -0.33726 0.40689 ft_conserv~s | 0.24983 0.74497 -0.15630 0.10200 0.34777 ft_liberals | 0.25077 -0.11858 0.77049 -0.01635 0.32913 ft_labunion | 0.00952 0.08541 0.66571 -0.34847 0.42801 ft_bigbus | 0.24457 0.62549 0.05487 0.12701 0.52980 ft_poorpeo~e | 0.56328 0.09108 0.17236 -0.59345 0.29253 ft_welfare~s | 0.37705 0.09048 0.43201 -0.23032 0.60997 ft_hispanics | 0.78515 0.08361 0.24188 -0.07713 0.31209 ft_christf~d | 0.08739 0.78286 0.05479 -0.12339 0.36127 ft_womensm~t | 0.33922 0.02591 0.71218 -0.04438 0.37509 ft_oldfolks | 0.52127 0.07926 0.06327 -0.66189 0.27989 ft_environ | 0.30632 -0.03449 0.61610 -0.14980 0.50296 ft_homosex~s | 0.45788 -0.23822 0.48658 0.33620 0.38381 ft_christc~l | 0.05132 0.80667 0.02015 -0.17351 0.31614 ft_catholics | 0.58534 0.33431 0.11870 -0.16116 0.50555 ft_jews | 0.80407 0.09788 0.22169 -0.06243 0.29084 ft_protest~s | 0.67625 0.34763 0.11164 -0.11568 0.39600 ft_feminists | 0.21780 0.00244 0.77467 0.09628 0.34318 ft_asianamer | 0.81339 0.10220 0.19758 -0.06342 0.28489 . rotate,factors(3) ; (varimax rotation) Rotated Factor Loadings Variable | 1 2 3 Uniqueness -------------+------------------------------------------- ft_military | 0.33683 0.58710 -0.08700 0.49958 ft_fedgov | 0.06695 0.40362 0.51069 0.52666 ft_blacks | 0.79065 0.08376 0.26131 0.29868 ft_whites | 0.70281 0.27669 0.08632 0.40689 ft_conserv~s | 0.23593 0.67933 -0.17146 0.34777 ft_liberals | 0.23894 -0.13113 0.77060 0.32913 ft_labunion | 0.07735 0.16423 0.68492 0.42801 ft_bigbus | 0.22153 0.55709 0.03912 0.52980 ft_poorpeo~e | 0.67524 0.19394 0.20603 0.29253 ft_welfare~s | 0.41410 0.11622 0.44328 0.60997 ft_hispanics | 0.78252 0.04514 0.24297 0.31209 ft_christf~d | 0.12310 0.78120 0.05317 0.36127 ft_womensm~t | 0.33414 0.00971 0.71225 0.37509 ft_oldfolks | 0.64951 0.20256 0.10164 0.27989 ft_environ | 0.32421 -0.02031 0.62365 0.50296 ft_homosex~s | 0.36809 -0.34588 0.46625 0.38381 ft_christc~l | 0.09912 0.81908 0.02152 0.31614 ft_catholics | 0.61008 0.32233 0.12296 0.50555 ft_jews | 0.79834 0.05415 0.22170 0.29084 ft_protest~s | 0.68964 0.31793 0.11269 0.39600 ft_feminists | 0.18484 -0.03936 0.76653 0.34318 ft_asianamer | 0.80797 0.05804 0.19762 0.28489 . rotate,promax ; (promax rotation) Rotated Factor Loadings Variable | 1 2 3 4 Uniqueness -------------+------------------------------------------------------ ft_military | 0.17222 0.43045 -0.16989 -0.35834 0.49958 ft_fedgov | -0.22184 0.30859 0.53261 -0.26391 0.52666 ft_blacks | 0.74688 -0.02469 0.09835 -0.17637 0.29868 ft_whites | 0.60999 0.09858 -0.07920 -0.34636 0.40689 ft_conserv~s | 0.19156 0.78785 -0.16926 0.20180 0.34777 ft_liberals | 0.10068 -0.10975 0.77819 0.04495 0.32913 ft_labunion | -0.20484 0.05116 0.70068 -0.28740 0.42801 ft_bigbus | 0.15634 0.68113 0.05738 0.23538 0.52980 ft_poorpeo~e | 0.49956 -0.11709 0.01750 -0.63533 0.29253 ft_welfare~s | 0.26612 0.01978 0.37465 -0.20060 0.60997 ft_hispanics | 0.77605 -0.01785 0.08962 -0.07393 0.31209 ft_christf~d | -0.06735 0.80879 0.08002 -0.00620 0.36127 ft_womensm~t | 0.18395 0.02331 0.70168 0.02694 0.37509 ft_oldfolks | 0.47637 -0.14980 -0.09933 -0.72322 0.27989 ft_environ | 0.17241 -0.07178 0.59069 -0.10789 0.50296 ft_homosex~s | 0.45330 -0.19812 0.44537 0.36807 0.38381 ft_christc~l | -0.10716 0.82408 0.04721 -0.05974 0.31614 ft_catholics | 0.53625 0.25027 0.00775 -0.13199 0.50555 ft_jews | 0.80071 -0.00267 0.06557 -0.05879 0.29084 ft_protest~s | 0.63950 0.26349 -0.01519 -0.08479 0.39600 ft_feminists | 0.05324 0.05502 0.80777 0.18908 0.34318 ft_asianamer | 0.81608 -0.00130 0.03733 -0.06243 0.28489 . rotate,promax factors(3) ; (promax rotation) Rotated Factor Loadings Variable | 1 2 3 Uniqueness -------------+------------------------------------------- ft_military | 0.27090 0.55192 -0.14236 0.49958 ft_fedgov | -0.17535 0.45031 0.57186 0.52666 ft_blacks | 0.80646 -0.04853 0.09308 0.29868 ft_whites | 0.71241 0.16191 -0.06462 0.40689 ft_conserv~s | 0.15868 0.66403 -0.20373 0.34777 ft_liberals | 0.07169 -0.13417 0.77924 0.32913 ft_labunion | -0.15861 0.20564 0.74527 0.42801 ft_bigbus | 0.10778 0.55119 0.02369 0.52980 ft_poorpeo~e | 0.66445 0.08748 0.06870 0.29253 ft_welfare~s | 0.31205 0.07218 0.39085 0.60997 ft_hispanics | 0.81201 -0.08921 0.07241 0.31209 ft_christf~d | -0.06322 0.80963 0.07882 0.36127 ft_womensm~t | 0.16454 -0.00714 0.70018 0.37509 ft_oldfolks | 0.66455 0.09463 -0.03915 0.27989 ft_environ | 0.18725 -0.04307 0.60318 0.50296 ft_homosex~s | 0.36366 -0.40831 0.39735 0.38381 ft_christc~l | -0.09022 0.85245 0.05255 0.31614 ft_catholics | 0.58407 0.23110 0.00218 0.50555 ft_jews | 0.83441 -0.08418 0.04558 0.29084 ft_protest~s | 0.67939 0.21011 -0.02954 0.39600 ft_feminists | -0.01117 -0.02630 0.79450 0.34318 ft_asianamer | 0.85181 -0.08357 0.01689 0.28489 . end of do-file . exit, clear