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Thomas Haarklau Kleppesto

Biographic Data

ID8866017
NAMEThomas Haarklau Kleppesto
GIVEN NAMESThomas Haarklau
FAMILY NAMEKleppesto
SIGNATUREKLEPPESTØ T H
AFFILIATIONSUniversity of Oslo
ORCID0000-0001-5342-3478
VERIFIEDYes
TOTAL WORKS10
TOTAL CITATIONS0
WORKS AS AUTHOR10
WORKS AS EDITOR0
FIRST PUBLICATION YEAR2018
LATEST PUBLICATION YEAR2026
H-INDEX0
  • Too picky to be picked? Minimum mate standards explain number of years spent single, in uncommitted and committed relationships

    Open Access•Marius Stavang, Mons Bendixen et al.•ARTICLE•Evolution and Human Behavior•2026

  • Coalitional Psychology and the Evolution of Intelligence

    Open Access•Jonathan Egeland, Leif Edward Ottesen Kennair et al.•ARTICLE•Evolution and Human Behavior•2026

    As evolutionary and behavioral scholars have long noted, humans are “uniquely unique,” partly due to our remarkable cognitive sophistication. Since Darwin, scientists have sought both proximate and ultimate explanations for how human thinking and information processing differ from those of other species, and why humans evolved such advanced cognitive skills. Research over the past few decades suggests that various aspects of human socioecology—su…

  • The Relationship Between Educational Attainment and Right-Wing Authoritarianism

    Open Access•Nikolai Haahjem Eftedal, Thomas Haarklau Kleppesto et al.•ARTICLE•Personality and Social Psychology…•2026

    While it is well-established that educational attainment and Right-Wing Authoritarianism (RWA) are negatively correlated, it remains unclear why, as causal effects are hard to distinguish from the effects of confounders. Here, we use an adaptation of the discordant twin design in a structural equation framework (ACE-β models) with 1264 Norwegian monozygotic and dizygotic twins, to investigate whether education and RWA remain associated after cont…

  • Parental income and psychiatric disorders from age 10 to 40

    Open Access•Hans Fredrik Sunde, Espen M Eilertsen et al.•ARTICLE•Journal of Child Psychology and…•2026

    BACKGROUND: Lower parental income is associated with more psychiatric disorders among offspring, but it is unclear if this association reflects effects of parental income (social causation) or shared risk factors (social selection). Prior research finds contradictory results, which may be due to age differences between the studied offspring. METHODS: Here, we studied psychiatric disorders in the entire Norwegian population aged 10 to 40 years bet…

  • The genetic underpinnings of right‐wing authoritarianism and social dominance orientation explain political attitudes beyond Big Five personality

    Open Access•Thomas Haarklau Kleppesto, Nikolai Olavi Czajkowski et al.•ARTICLE•Journal of Personality•2024

    OBJECTIVE: Political attitudes are predicted by the key ideological variables of right-wing authoritarianism (RWA) and social dominance orientation (SDO), as well as some of the Big Five personality traits. Past research indicates that personality and ideological traits are correlated for genetic reasons. A question that has yet to be tested concerns whether the genetic variation underlying the ideological traits of RWA and SDO has distinct contr…

  • Social Dominance Orientation (SDO)

    Open Access•Thomas Haarklau Kleppesto, Nikolai Haahjem Eftedal et al.•CHAPTER•Encyclopedia of Evolutionary…•2020

  • Intelligence

    Open Access•Thomas Haarklau Kleppesto•CHAPTER•Encyclopedia of Evolutionary…•2019

  • Social Anxiety

    Open Access•Leif Edward Ottesen Kennair, Thomas Haarklau Kleppesto•CHAPTER•Encyclopedia of Evolutionary…•2018

  • Depression

    Open Access•Thomas Haarklau Kleppesto, Leif Edward Ottesen Kennair et al.•CHAPTER•Encyclopedia of Evolutionary…•2018

  • Evolutionary Clinical Psychology

    Open Access•Leif Edward Ottesen Kennair, Thomas Haarklau Kleppesto et al.•CHAPTER•Encyclopedia of Evolutionary…•2018

No prominent works on this page.

  • Social Anxiety

    Open Access•Leif Edward Ottesen Kennair, Thomas Haarklau Kleppesto•CHAPTER•Encyclopedia of Evolutionary…•2018

  • Depression

    Open Access•Thomas Haarklau Kleppesto, Leif Edward Ottesen Kennair et al.•CHAPTER•Encyclopedia of Evolutionary…•2018

  • Evolutionary Clinical Psychology

    Open Access•Leif Edward Ottesen Kennair, Thomas Haarklau Kleppesto et al.•CHAPTER•Encyclopedia of Evolutionary…•2018

  • Intelligence

    Open Access•Thomas Haarklau Kleppesto•CHAPTER•Encyclopedia of Evolutionary…•2019

  • Social Dominance Orientation (SDO)

    Open Access•Thomas Haarklau Kleppesto, Nikolai Haahjem Eftedal et al.•CHAPTER•Encyclopedia of Evolutionary…•2020

  • The genetic underpinnings of right‐wing authoritarianism and social dominance orientation explain political attitudes beyond Big Five personality

    Open Access•Thomas Haarklau Kleppesto, Nikolai Olavi Czajkowski et al.•ARTICLE•Journal of Personality•2024

    OBJECTIVE: Political attitudes are predicted by the key ideological variables of right-wing authoritarianism (RWA) and social dominance orientation (SDO), as well as some of the Big Five personality traits. Past research indicates that personality and ideological traits are correlated for genetic reasons. A question that has yet to be tested concerns whether the genetic variation underlying the ideological traits of RWA and SDO has distinct contr…

  • Too picky to be picked? Minimum mate standards explain number of years spent single, in uncommitted and committed relationships

    Open Access•Marius Stavang, Mons Bendixen et al.•ARTICLE•Evolution and Human Behavior•2026

  • Coalitional Psychology and the Evolution of Intelligence

    Open Access•Jonathan Egeland, Leif Edward Ottesen Kennair et al.•ARTICLE•Evolution and Human Behavior•2026

    As evolutionary and behavioral scholars have long noted, humans are “uniquely unique,” partly due to our remarkable cognitive sophistication. Since Darwin, scientists have sought both proximate and ultimate explanations for how human thinking and information processing differ from those of other species, and why humans evolved such advanced cognitive skills. Research over the past few decades suggests that various aspects of human socioecology—su…

  • The Relationship Between Educational Attainment and Right-Wing Authoritarianism

    Open Access•Nikolai Haahjem Eftedal, Thomas Haarklau Kleppesto et al.•ARTICLE•Personality and Social Psychology…•2026

    While it is well-established that educational attainment and Right-Wing Authoritarianism (RWA) are negatively correlated, it remains unclear why, as causal effects are hard to distinguish from the effects of confounders. Here, we use an adaptation of the discordant twin design in a structural equation framework (ACE-β models) with 1264 Norwegian monozygotic and dizygotic twins, to investigate whether education and RWA remain associated after cont…

  • Parental income and psychiatric disorders from age 10 to 40

    Open Access•Hans Fredrik Sunde, Espen M Eilertsen et al.•ARTICLE•Journal of Child Psychology and…•2026

    BACKGROUND: Lower parental income is associated with more psychiatric disorders among offspring, but it is unclear if this association reflects effects of parental income (social causation) or shared risk factors (social selection). Prior research finds contradictory results, which may be due to age differences between the studied offspring. METHODS: Here, we studied psychiatric disorders in the entire Norwegian population aged 10 to 40 years bet…

Psychology (7 works) · Cognitive Abilities and Testing (5 works) · Evolutionary Psychology and Human Behavior (5 works) · Evolutionary psychology (3 works) · Political science (3 works) · Attachment and Relationship Dynamics (2 works) · Biology (2 works) · Cultural Differences and Values (2 works) · Dominance (genetics) (2 works) · Evolutionary Game Theory and Cooperation (2 works)

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