WLS Codebooks
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.
Sibling IQ
The recommended IQ measures are gwiiq_bm for graduates and swiiq_t for siblings. These measures include imputed junior year Henmon-Nelson scores. The imputations were based on scores from other grades, the Wisconsin Centile Rank, and the IOWA test. There were a variety of errors in IQ variables used prior to February 1998. These variables - XIQ XIQGD XIQRAW XIQSCOR XIQYR - have been moved to the archives and are not recommended to be used unless replicating previous studies. swiiq_t Preferred measure of sibling IQ score shnrs_t Raw Henmon-Nelson score, transformed to junior year metric shncr_t,swicr_t Centile rank for transformed Junior year Henmon-Nelson score sflag Source of IQ data shnrs Raw Henmon-Nelson test score swicr_hn,swicr_ot Centile rank for Henmon-Nelson score sagecm-stseaflg Details when mental ability test given sbkcd Book code for IQ score
swiiq_t: Preferred measure of sibling IQ score, mapped from raw Henmon-Nelson test score based on transformed raw score.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: SHNRS_T, IQ
Revisions: Added 2/98
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR | 1455 | 1497 | 2952 |
-2 | 358 | 388 | 746 | |
61 - 88 | 635 | 758 | 1393 | |
89 - 98 | 694 | 740 | 1434 | |
99 - 107 | 751 | 722 | 1473 | |
109 - 120 | 660 | 788 | 1448 | |
121 - 145 | 438 | 433 | 871 |
to be used for WLS Siblings.
See Appendix G - COR652 for Construction of "new" IQ variables.
COR652 has details on formulas/methods used to transform scores
into the metric of Henmon-Nelson Junior year raw scores.
shnrs_t: Raw Henmon-Nelson test score, transformed to junior year metric.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: IQ
Revisions: Added 2/98
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR | 1455 | 1497 | 2952 |
-2 | 358 | 388 | 746 | |
7 - 47 | 635 | 758 | 1393 | |
47.94 - 55 | 694 | 740 | 1434 | |
55.57 - 62 | 723 | 700 | 1423 | |
62.24 - 70 | 608 | 723 | 1331 | |
70.08 - 90 | 518 | 520 | 1038 |
COR652 has details on formulas/methods used to transform scores
into the metric of Henmon-Nelson Junior year raw scores.
shncr_t: Centile rank based on National test takers for Henmon-Nelson test score from junior year, based on transformed raw score.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: SHNRS_T, IQ
Revisions: Added 2/98
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR | 1455 | 1497 | 2952 |
-2 | 358 | 388 | 746 | |
0 - 33 | 635 | 758 | 1393 | |
36 - 56 | 694 | 740 | 1434 | |
59 - 75 | 751 | 722 | 1473 | |
78 - 92 | 660 | 788 | 1448 | |
93 - 100 | 438 | 433 | 871 |
COR652 has details on formulas/methods used to transform scores
into the metric of Henmon-Nelson Junior year raw scores.
swicr_t: Centile rank based on Wisconsin test takers for Henmon-Nelson test score from junior year, based on transformed raw score.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: SHNRS_T, IQ
Revisions: Added 2/98
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR | 1455 | 1497 | 2952 |
-2 | 358 | 388 | 746 | |
0 - 21 | 635 | 758 | 1393 | |
23 - 45 | 694 | 740 | 1434 | |
48 - 68 | 751 | 722 | 1473 | |
71 - 90 | 660 | 788 | 1448 | |
91 - 100 | 438 | 433 | 871 |
COR652 has details on formulas/methods used to transform scores
into the metric of Henmon-Nelson Junior year raw scores.
sflag: Source of IQ data.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: IQ
Revisions: Added 2/98
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR | 1455 | 1497 | 2952 |
-2 | 358 | 388 | 746 | |
1 | Wave 1 data set | 861 | 893 | 1754 |
2 | 1997 search/ Henmon Nelson found | 2231 | 2462 | 4693 |
3 | 1997 search/ Other tests combined | 86 | 86 | 172 |
See Appendix G - COR652 for Construction of "new" IQ variables.
shnrs: Raw Henmon-Nelson test score.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: IQ
Revisions: Added 2/98
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR/Non-Henmon-Nelson score | 1543 | 1587 | 3130 |
-2 | 358 | 388 | 746 | |
7 - 45 | 624 | 715 | 1339 | |
46 - 53 | 626 | 692 | 1318 | |
54 - 60 | 674 | 683 | 1357 | |
61 - 68 | 630 | 714 | 1344 | |
69 - 87 | 536 | 547 | 1083 |
swicr_hn: Centile rank based on Wisconsin test takers for Henmon-Nelson test.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: IQ
Revisions: Added 2/98
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR/Non-Henmon-Nelson score (SFLAG=3) | 1541 | 1583 | 3124 |
-2 | 358 | 388 | 746 | |
0 - 23 | 597 | 731 | 1328 | |
24 - 45 | 662 | 676 | 1338 | |
46 - 65 | 676 | 634 | 1310 | |
66 - 84 | 590 | 749 | 1339 | |
85 - 100 | 567 | 565 | 1132 |
swicr_ot: Centile rank based on Wisconsin test takers for tests other than the Henmon-Nelson test.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: IQ
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR/Has Henmon-Nelson score (SFLAG<3) | 4547 | 4852 | 9399 |
-2 | 358 | 388 | 746 | |
5 - 31 | 11 | 23 | 34 | |
32 - 46 | 13 | 23 | 36 | |
47 - 65 | 23 | 14 | 37 | |
66 - 80 | 23 | 11 | 34 | |
82 - 98 | 16 | 15 | 31 |
sagecm: Age in months of sibling respondent when ability test was taken.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: IQ
Revisions: Added 2/98
*NOT AVAILABLE ON PUBLIC RELEASE*
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR/Missing STYEAR/STSEASN/XCMBRDX | 2523 | 2622 | 5145 |
-2 | 358 | 388 | 746 | |
140 - 194 | 431 | 516 | 947 | |
195 - 199 | 439 | 454 | 893 | |
200 - 203 | 512 | 523 | 1035 | |
204 - 208 | 465 | 520 | 985 | |
209 - 327 | 263 | 303 | 566 |
sdatet: Century month when ability test given.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: IQ
Revisions: Added 2/98
*NOT AVAILABLE ON PUBLIC RELEASE*
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR/Missing STYEAR or STSEASN | 1461 | 1503 | 2964 |
-2 | 358 | 388 | 746 | |
400 - 616 | 669 | 754 | 1423 | |
622 - 664 | 662 | 716 | 1378 | |
670 - 712 | 773 | 800 | 1573 | |
718 - 760 | 658 | 697 | 1355 | |
766 - 922 | 410 | 468 | 878 |
See Appendix G - COR652 for Construction of "new" IQ variables.
sgrade: Grade in which mental ability test given.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: IQ
Revisions: Added 2/98
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR/No grade found | 1455 | 1497 | 2952 |
-2 | 358 | 388 | 746 | |
7 | 3 | 2 | 5 | |
8 | 368 | 387 | 755 | |
9 | 121 | 143 | 264 | |
10 | 379 | 447 | 826 | |
11 | 2202 | 2352 | 4554 | |
12 | 105 | 110 | 215 |
styear: Year in which mental ability test given.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: IQ
Revisions: Added 2/98
*NOT AVAILABLE ON PUBLIC RELEASE*
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR/No year found | 1457 | 1500 | 2957 |
-2 | 358 | 388 | 746 | |
33 - 51 | 672 | 755 | 1427 | |
52 - 55 | 686 | 739 | 1425 | |
56 - 59 | 785 | 817 | 1602 | |
60 - 63 | 658 | 711 | 1369 | |
64 - 76 | 375 | 416 | 791 |
stgrade: Grade in which mental ability test given.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: IQ
Revisions: Added 2/98
*NOT AVAILABLE ON PUBLIC RELEASE*
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR/No grade found | 1455 | 1498 | 2953 |
-2 | 358 | 388 | 746 | |
7 | 2 | 1 | 3 | |
8 | 6 | 5 | 11 | |
9 | 409 | 432 | 841 | |
10 | 218 | 284 | 502 | |
11 | 2381 | 2533 | 4914 | |
12 | 162 | 185 | 347 |
stseasn: Season in which mental ability test given.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: IQ
Revisions: Added 2/98
*NOT AVAILABLE ON PUBLIC RELEASE*
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR/ No Season found | 1461 | 1501 | 2962 |
-2 | 358 | 388 | 746 | |
1 | Fall | 733 | 816 | 1549 |
2 | Spring | 2439 | 2621 | 5060 |
next variable. If season code is missing, then at least one of the
variables STYEAR, STGRADE, SWICR_HN or SHNRS are also missing.
See Appendix G - COR652 for Construction of "new" IQ variables.
stseaflg: Source of Season Code for mental ability test given.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: IQ
Revisions: Added 2/98
*NOT AVAILABLE ON PUBLIC RELEASE*
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
-3 | Ability scores not found/NR/ No Season found | 1459 | 1500 | 2959 |
-2 | 358 | 388 | 746 | |
1 | 1997 lookup | 2255 | 2479 | 4734 |
2 | Match on year, grade, sib high school | 91 | 104 | 195 |
3 | Fairly certain | 639 | 678 | 1317 |
4 | Best guess | 42 | 49 | 91 |
5 | Random guess | 1 | 1 | 2 |
6 | Lookup of Wave 1 in Oct. 1997 | 146 | 127 | 273 |
for a year/grade combination, then missing seasons for that
year/grade were set to the same as the valid ones.
Code 4 - if the majority of valid season codes were identical for
a year/grade combination, then missing seasons for that year/grade
were assigned the season code of the majority.
Code 5 - If no other year/ grade combination had a valid season code
then a season was assigned randomly.
See Appendix G - COR652 for Construction of "new" IQ variables.
sbkcd: Book code for IQ score. 8-character book code.
Data source: Sibling Respondent
Collected in: 1977
Mode: none
Source variables: IQ
Revisions: Added 2/98
*NOT AVAILABLE ON PUBLIC RELEASE*
Frequencies | ||||
---|---|---|---|---|
Value | Label | Male | Female | Total |
System missing - NR | 1880 | 1706 | 3586 | |
"404112" | 6 | 4 | 10 | |
"4312" | 11 | 17 | 28 | |
"4811" | 25 | 30 | 55 | |
"4911" | 42 | 32 | 74 | |
"50511012" | 2 | 2 | 4 | |
"5253Iowa" | 3 | 1 | 4 | |
"5511" | 89 | 82 | 171 | |
"60SpM-Z" | 0 | 1 | 1 | |
"62sp" | 9 | 9 | 18 | |
"70Sp" | 5 | 8 | 13 |