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Studies

Loehlin & Nichols (1976): study US 1963

Publication

Author(s):
Loehlin, J.C.; Nichols, R.C.
Title:
Heredity, Environment and Personality. A Study of 850 Sets of Twins.
Source:
University of Texas Press, 1976, Austin, USA

Investigation

Public:
Adolescent same-sex twins, USA, 1963
Sample:
Probability stratified sample
Respondents:
N = 850
Non Response:
29 %
Assessment:
Questionnaire: paper
Supplementary information from parents on mailed questionnaire

Happiness Measure(s) and Distributional Findings

Full text:
Selfreport 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)
Classification:
O-HP-g-sq-v-7-a
Author's label:
Happiness
Page in publication:
15
Observed distribution
Frequencies
1: 0%,   2: 0%,   3: 0%,   4: 0%,   5: 0%,   6: 0%,   7: 0%
Summary Statistics
On original range 1 - 7 On range 0-10
Mean:
6.16
Full text:
Selfreport 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
Classification:
O-HP-g-sq-v-2-b
Author's label:
Cheerful
Remarks:
mean is % yes
Page in publication:
18
Observed distribution
Frequencies
1: 0%,   2: 0%
Summary Statistics
On original range 1 - 2 On range 0-10
Mean:
72.00
Full text:
Selfreport 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
Classification:
O-HP-g-sq-v-2-c
Author's label:
Dissatisfied
Remarks:
Coding reversed in original question. mean is % yes
Page in publication:
18
Observed distribution
Frequencies
1: 0%,   2: 0%
Summary Statistics
On original range 1 - 2 On range 0-10
Mean:
79.00

Correlational Findings

Author's label Subject Description Finding Happiness of twin sibling Happiness of siblings
Happiness of sibblings
Sex Sex (male vs female) Being an identical or fraternal twins Twin or triplet child