WLS Codebooks and Flowcharts

Note: Codebooks contain frequency data from the private data release. For some variables, these differ from the frequencies in the public release. Variables that differ between the public and private versions include "(not available on public release)" as part of the variable description, or a note indicating the difference between the public and private versions.

1957 - IQ

There were a variety of errors in iq variables used prior to February 1998.
These variables - IQ IQSCOR IQERR IQSOURCE IQHNQ IQHNSCRQ IQJCR IQJSCOR
IQFCR IQFSCOR IQJRS IQFRS - have been moved to the archives and are not
recommended to be used unless replicating previous studies.

The end of the variable name represents whether it is the preferred measures
(bm), from junior year (j) or from freshman year (f)

gwiiq_*     IQ score mapped from raw Henmon-Nelson test score
ghnrs_*     Raw Henmon-Nelson test score
ghncr_*     Centile rank based on National test takers for Henmon-Nelson score
gwicr_*     Centile rank based on Wisconsin test takers for Henmon-Nelson score
gflag_*     Source of Henmon-Nelson raw score

gagecm_j    Age in months when junior year Henmon-Nelson test was taken
gagecm_f    Age in months when freshman year Henmon-Nelson test was taken
gtdate_f    Date when graduate took freshman year Henmon-Nelson test. 


NOTE:   See Appendix G - COR652 for Construction of "new" IQ variables.

NOTE:   See Appendix A - Memo067 for a general selection of variables
        used for previous WLS publications.

gwiiq_bm: Preferred measure of IQ score mapped from raw Henmon-Nelson test score.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
61 - 88 1081 1147 2228
89 - 97 1016 1126 2142
98 - 104 1002 1134 2136
106 - 115 1070 1123 2193
117 - 145 822 796 1618
Note: This measure of IQ is the recommended one if only one measure is
to be used for WLS Graduates.

See Appendix G - COR652 for Construction of "new" IQ variables.

ghnrs_bm: Preferred measure of raw Henmon-Nelson test score.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
8 - 47 1081 1147 2228
47.94 - 54 1016 1126 2142
54.62 - 60 995 1128 2123
60.33 - 68 1077 1129 2206
68.91 - 90 822 796 1618
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

ghncr_bm: Preferred measure of centile rank based on National test takers for Henmon-Nelson test score.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
0 - 33 1081 1147 2228
36 - 53 1016 1126 2142
56 - 70 1002 1134 2136
73 - 88 1070 1123 2193
90 - 100 822 796 1618
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

gwicr_bm: Preferred measure of centile rank based on Wisconsin test takers for Henmon-Nelson test score.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
0 - 21 1081 1147 2228
23 - 41 1016 1126 2142
45 - 61 1002 1134 2136
65 - 84 1070 1123 2193
86 - 100 822 796 1618
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

gflag_bm: Source of preferred measure Henmon-Nelson raw score.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
1 Junior Year (GHNRS_J) 4561 4947 9508
2 Freshman Year (GHNRS_F) 299 295 594
3 Other source (IQHNQ) 131 84 215
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

gwiiq_j: IQ score mapped from raw junior year Henmon-Nelson test score.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
-3 NOT ASCERTAINED/REFUSED 430 379 809
61 - 88 996 1055 2051
89 - 97 925 1049 1974
98 - 104 916 1076 1992
106 - 115 985 1032 2017
117 - 145 739 735 1474
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

ghnrs_j: Raw Henmon-Nelson test score from junior year.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
-3 NOT ASCERTAINED/REFUSED 430 379 809
8 - 47 996 1055 2051
48 - 54 925 1049 1974
55 - 60 916 1076 1992
61 - 68 985 1032 2017
69 - 85 739 735 1474
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

ghncr_j: Centile rank based on National test takers for Henmon-Nelson test score from junior year.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
-3 NOT ASCERTAINED/REFUSED 430 379 809
0 - 33 996 1055 2051
36 - 53 925 1049 1974
56 - 70 916 1076 1992
73 - 88 985 1032 2017
90 - 98 739 735 1474
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

gwicr_j: Centile rank based on Wisconsin test takers for Henmon-Nelson test score from junior year.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
-3 NOT ASCERTAINED/REFUSED 430 379 809
0 - 21 996 1055 2051
23 - 41 925 1049 1974
45 - 61 916 1076 1992
65 - 84 985 1032 2017
86 - 100 739 735 1474
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

gflag_j: Source of junior Henmon-Nelson raw score.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
-3 Junior raw score missing 430 379 809
1 IQJRS (1983 lookup) 651 702 1353
2 1996 lookup 3907 4240 8147
3 Suspected error in WI books, centile rank changed to match raw score 3 5 8
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

gagecm_j: Age in months when junior year Henmon-Nelson test was taken.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     
*NOT AVAILABLE ON PUBLIC RELEASE*

Frequencies
Value Label Male Female Total
-3 NOT ASCERTAINED/REFUSED 430 379 809
177 - 306 Age in Months 4561 4947 9508
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

gwiiq_f: IQ score mapped from raw freshman year Henmon-Nelson test score.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
-3 NOT ASCERTAINED/REFUSED 1650 1666 3316
61 - 91 841 727 1568
92 - 99 722 762 1484
101 - 108 736 817 1553
109 - 118 651 818 1469
120 - 145 391 536 927
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

ghnrs_f: Raw Henmon-Nelson test score from freshman year.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
-3 NOT ASCERTAINED/REFUSED 1650 1666 3316
9 - 35 841 727 1568
36 - 42 722 762 1484
43 - 49 736 817 1553
50 - 58 651 818 1469
59 - 84 391 536 927
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

ghncr_f: Centile rank based on National test takers for Henmon-Nelson test score from freshman year.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
-3 NOT ASCERTAINED/REFUSED 1650 1666 3316
0 - 36 841 727 1568
39 - 57 722 762 1484
59 - 74 736 817 1553
77 - 89 651 818 1469
90 - 99 391 536 927
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

gwicr_f: Centile rank based on Wisconsin test takers for Henmon-Nelson test score from freshman year.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
-3 NOT ASCERTAINED/REFUSED 1650 1666 3316
0 - 27 841 727 1568
30 - 48 722 762 1484
52 - 70 736 817 1553
73 - 88 651 818 1469
90 - 100 391 536 927
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

gflag_f: Source of freshman year Henmon-Nelson raw score.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
-3 Freshman raw score missing 1650 1666 3316
1 IQFRS (1977 lookup) 648 704 1352
2 1997 lookup 2685 2950 5635
3 Suspected error in WI books, centile rank changed to match raw score 8 5 13
4 Suspected error in WI books, raw score changed to match centile rank 0 1 1
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

gagecm_f: Age in months when freshman year Henmon-Nelson test was taken.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     
*NOT AVAILABLE ON PUBLIC RELEASE*

Frequencies
Value Label Male Female Total
-3 NOT ASCERTAINED/REFUSED 1650 1666 3316
147 - 276 Age in Months 3341 3660 7001
Note: See Appendix G - COR652 for Construction of "new" IQ variables.

gtdate_f: Date in century months when graduate took freshman year Henmon-Nelson test.

Data source: Collected Information      Collected in: 1957      Mode: none
Source variables: IQ
Revisions: Replacement 2/98     

Frequencies
Value Label Male Female Total
-3 NOT ASCERTAINED/REFUSED 1650 1666 3316
634 - 658 Century Months 3341 3660 7001
Note: See Appendix G - COR652 for Construction of "new" IQ variables

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