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The Glass is Half Full and Half Empty: A population-representative twin study testing if Optimism and Pessimism are distinct systems.
J Posit Psychol 2015; 10(6):533-542JP

Abstract

Optimism and pessimism are associated with important outcomes including health and depression. Yet it is unclear if these apparent polar opposites form a single dimension or reflect two distinct systems. The extent to which personality accounts for differences in optimism/pessimism is also controversial. Here, we addressed these questions in a genetically informative sample of 852 pairs of twins. Distinct genetic influences on optimism and pessimism were found. Significant family-level environment effects also emerged, accounting for much of the negative relationship between optimism and pessimism, as well as a link to neuroticism. A general positive genetics factor exerted significant links among both personality and life-orientation traits. Both optimism bias and pessimism also showed genetic variance distinct from all effects of personality, and from each other.

Authors+Show Affiliations

University of Edinburgh, 7 George Square, EH8 9JZ, Edinburgh, UK, +44 131 651 1945.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

26561494

Citation

Bates, Timothy C.. "The Glass Is Half Full and Half Empty: a Population-representative Twin Study Testing if Optimism and Pessimism Are Distinct Systems." The Journal of Positive Psychology, vol. 10, no. 6, 2015, pp. 533-542.
Bates TC. The Glass is Half Full and Half Empty: A population-representative twin study testing if Optimism and Pessimism are distinct systems. J Posit Psychol. 2015;10(6):533-542.
Bates, T. C. (2015). The Glass is Half Full and Half Empty: A population-representative twin study testing if Optimism and Pessimism are distinct systems. The Journal of Positive Psychology, 10(6), pp. 533-542.
Bates TC. The Glass Is Half Full and Half Empty: a Population-representative Twin Study Testing if Optimism and Pessimism Are Distinct Systems. J Posit Psychol. 2015 Nov 1;10(6):533-542. PubMed PMID: 26561494.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The Glass is Half Full and Half Empty: A population-representative twin study testing if Optimism and Pessimism are distinct systems. A1 - Bates,Timothy C, Y1 - 2015/02/25/ PY - 2015/11/13/entrez PY - 2015/11/13/pubmed PY - 2015/11/13/medline KW - Big Five KW - Optimism KW - Pessimism KW - behavior genetics KW - personality KW - twins SP - 533 EP - 542 JF - The journal of positive psychology JO - J Posit Psychol VL - 10 IS - 6 N2 - Optimism and pessimism are associated with important outcomes including health and depression. Yet it is unclear if these apparent polar opposites form a single dimension or reflect two distinct systems. The extent to which personality accounts for differences in optimism/pessimism is also controversial. Here, we addressed these questions in a genetically informative sample of 852 pairs of twins. Distinct genetic influences on optimism and pessimism were found. Significant family-level environment effects also emerged, accounting for much of the negative relationship between optimism and pessimism, as well as a link to neuroticism. A general positive genetics factor exerted significant links among both personality and life-orientation traits. Both optimism bias and pessimism also showed genetic variance distinct from all effects of personality, and from each other. SN - 1743-9760 UR - https://www.unboundmedicine.com/medline/citation/26561494/The_Glass_is_Half_Full_and_Half_Empty:_A_population_representative_twin_study_testing_if_Optimism_and_Pessimism_are_distinct_systems_ L2 - https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/26561494/ DB - PRIME DP - Unbound Medicine ER -