Findings on happiness in Loehlin & Nichols (1976): study US 1963

Publication
Author(s)Loehlin, J.C.; Nichols, R.C.
TitleHeredity, Environment and Personality. A Study of 850 Sets of Twins.
SourceUniversity of Texas Press, 1976, Austin, USA
Investigation
PublicAdolescent same-sex twins, USA, 1963
Collect period5
Survey nameNot available
SampleProbability stratified sample
 From a group of 596241 high school juniors who did National Merit Scholarship Qualifying test (NMSQT), 1507 same -sex twin pairs received an initial questionaire, which was returned by 1188 pairs.Those were send a series of additional tests and questionnaires. Eventually from 850 pairs complete data were received from both members and their parents.
Respondents N =850
Non Response29 %
 29 % NR of 1188
AssesmentQuestionnaire: paper
 Supplementary information from parents on mailed questionnaire
Happiness measure(s) used
Full textSelfreport on single question: Below are a number of dimensions on which people can vary. Please rate yourself on each dimension as honestly as you can. Many of the traits depend on the situation of course, but try to rate yourself as you usually are. Happy-unhappy 7 very happy 6 fairly happy 5 slightly happy 4 neither or both 3 slightly unhappy 2 fairly unhappy 1 very unhappy Item in longer personality inventory Numbers reversed original presentation (happy 1, unhappy 7)
ClassificationO-HP-g-sq-v-7-a
Author's labelHappiness
Page in publication15
Finding used in
nation ranks
Yes
 On original range 1 - 7On range 0 - 10
Mean6.16
Standard deviation


Full textSelfreport on single question: Which of the following adjectives do you consider to be descriptive of yourself? Circle the number besides any adjective that you might use in describing yourself to someone else. Your behavior will vary with situation of course, so circle the numbers besides adjectives that apply to you frequently, even though they may not apply all the time. Work rapidly putting down your first thoughts. Cheerful 1 no (not circled) 2 yes (circled) Item in longer personality inventory
ClassificationO-HP-g-sq-v-2-b
Author's labelCheerful
Page in publication18
Remarksmean is % yes
Finding used in
nation ranks
Yes
 On original range 1 - 2On range 0 - 10
Mean72.00
Standard deviation


Full textSelfreport on single question: Which of the following adjectives do you consider to be descriptive of yourself? Circle the number besides any adjective that you might use in describing yourself to someone else. Your behavior will vary with situation of course, so circle the numbers besides adjectives that apply to you frequently, even though they may not apply all the time. Work rapidly putting down your first thoughts. Satisfied 1 no (not circled) 2 yes (circled) Item in longer personality inventory
ClassificationO-HP-g-sq-v-2-c
Author's labelDissatisfied
Page in publication18
RemarksCoding reversed in original question. mean is % yes
Finding used in
nation ranks
Yes
 On original range 1 - 2On range 0 - 10
Mean79.00
Standard deviation


Correlational findings

Author's labelSubject Code
Finding
Subject description
Being an identical or fraternal twinsF01ac04Twin or triplet child
Happiness of twin siblingH08ac04Happiness of sibblings
Happiness of twin siblingF01af02dHappiness of siblings, also classified as above ↑
SexG01aaSex (male vs female)