Variables

Variable Name **

Definition
CASENO    Participant identification number
Demographic Variables
SEX Participant gender
AGEGRPxx Participant age group based on year of birth in 7-year increments; agegrp value increases over time as participant ages.
COHORT    Participant cohort based on year of birth in 7-year increments; lower cohort values tend to drop from succeeding datasets as oldest cohorts leave SLS. Cohort value remains consistent across time for participants.
HTxx      Participant height in inches
WTxx     Participant weight in pounds
MSxx      Marital Status
CHILxx Number of children
OCCxx   Occupation
EDUCxx Years of education (1 – 20)
CHHxx    Change in homes in past five years (number of times 0 – 20)
CHJxx     Change in jobs/employment in past five year (number of times 0 – 20)
CHPxx     Number of trades/professions in past five years (0 – 10)
LFSxx     Life Satisfaction
JADJxx    Job Success

Cognitive/Personality Variables:

Vxx PMA Verbal: number correct

VOC ETS Vocabulary II: number correct

ADVOC ETS Vocabulary IV; number correct

Sxx PMA Space: number correct minus number wrong

ORxx Object Rotation: number correct minus number wrong

ARxx Alphanumeric Rotation: number correct minus number wrong

CCxx Cube comparison: number correct

Rxx PMA Reason: number correct

LTRSxx ADEPT Letter series: number correct

WSxx Word series: number correct

NSxx ETS Number series: number correct

Nxx PMA Number: number correct minus number wrong

ADDxx ETS Additions: number correct

SMULTxx ETS Subtracction and Multiplication: number cxorrect

Wxx PMA Word Fluency: total number correct words

IMRECxx Immediate recall: number correct from list of 20 words

DELRECxx Delayed recall: number correct from list of 20 words

FAxx ETS Finding A’s: number correct

IDPICxx ETS Identical Pictures: number correct

NCOMPxx ETS Number comparisons: numbr correct

IQxx      PMA Intelligence Quotient: (Vxx + Sxx + (2 * Rxx) + (2 * Nxx) +Wxx)
QExx     PMA Education Quotient: ((2 * Vxx) + Rxx)

RESRxx    TBR Social Responsibility (number of items answered in responsible direction
MCRxx     TBR Motor Cognitive Flexibility
(mcr=capitals reversed weighted score + opposites r1 weighted score +
opposites r2 weighted score).

CAPxx TBR Capitals test: number of words copied correctly

CAPRxx Ratio of number of words in reversed condition divided by number of words copied correctly in original list

OPPxx TBR Opposites test: number of correct synonyms and correct antonyms

OPPR1xx 100 – (Series 3 errors / Series 3 total) * 100

OPPR2xx ((Series 3 correct / (0.5 *(Series 1 correct + series 2 corect)) * 100
PPRxx     TBR Attitudinal Flexibility or Personality-Rigidity
(ppr=rigidity weighted score + perseveration weighted score)

RIGIDxx TBR rigidity questionnaire: number of items answered in rigid direction

PERxx TBR Perseveration scale: number of items answered in perseverative direction

PPSxx     TBR Psychomotor Speed
(pps=capitals weighted score + opposites weighted score)

** where xx = year of data collection

SLS Demographic Variable Code

Variable
Codes
SEX (Gender) 1= male 2 = female

Cohort
By year of birth:
1 = pre 1893
2 = 1893 – 1899
3 = 1900 – 1906
4 = 1907 – 1913
5 = 1914 – 1920
6 = 1921 – 1927
7 = 1928 – 1934
8 = 1935 – 1941
9 = 1942 – 1948
10 = 1949 – 1955
11 = 1956 – 1962
12 = 1963 – 1969
13 = 1970 – 1976

Marital Status     1 = single 2 = divorced 3 = separated 4 = widowed 5 = married

Occupation    0 = unskilled labor
1 = domestic service
2 = operative/factory worker
3 = service occupation
4 = protective services
5 = skilled crafts
6 = clerical/sales
7 = proprietor/managerial
8 = semi-professional (BA/BS)
9 = professional (graduate degree)

55 = unemployed 66 = student 77 = homemaker 88 = retired

Life Satisfaction
1 = very happy
2 = moderately happy
3 = average
4 = somewhat unhappy
5 = very unhappy

Job Satisfaction
1 = very successful
2 = moderately successful
3 = average
4 = somewhat successful
5 = very unsuccessful

SLS Wave

1956

1963

1970

1977

1984

1991

1998

2005

Age Group codes based on year of birth 1, 2

1956
1963
1970
1977
1984
1991
1998
2005
1970-1976
25
32
1963–1969
25
32
39
1956-1962
25
32
39
46
1949–1955
25
32
39
46
53
1942–1948
25
32
39
46
53
60
1935–1941
25
32
39
46
53
60
67
1928–1934
25
32
39
45
53
60
67
74
1921–1927
32
39
46
53
60
67
74
81
1914–1920
39
46
53
60
67
74
81
88
1907–1913
46
53
60
67
74
81
88
95
1900–1906
53
60
67
74
81
88
95
102
1893–1899
60
67
74
81
88
95
102
Pre – 1893
67
74
81
88
95

Notes:
1 Age group code = midpoint of 7-year age group range; therefore, range of ages in each age group = code +/- 3 years.
2 Participants less than 22 years of age were assigned to the youngest age group and cohort for that data collection year. In subsequent waves, these participants retained their original cohort and agegroup assignments although their actual year of birth would have placed them in younger groups.​