scholarly journals Bolder guppies do not have more mating partners, yet sire more offspring

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Magdalena Herdegen-Radwan
Keyword(s):  
Reproductive Success ◽  
Personality Traits ◽  
Personality Trait ◽  
Poecilia Reticulata ◽  
Direct Evidence ◽  
Animal Groups ◽  
Fitness Consequences

Abstract Background Intra-individual stable but inter-individually variable behaviours, i.e. personalities, are commonly reported across diverse animal groups, yet the reasons for their maintenance remain controversial. Therefore, studying fitness consequences of personality traits is necessary to discriminate between alternative explanations. Results Here, I measured boldness, a highly repeatable personality trait, and reproductive success in male guppies, Poecilia reticulata. I found that bolder males had higher reproductive success than their shyer conspecifics and they sired offspring with females who had larger clutches. Conclusions This result provides direct evidence for fitness consequences of boldness in the guppy. It suggests that the effect may be driven by bolder males mating with more fecund females.

scholarly journals The bold and the sperm: positive association between boldness and sperm number in the guppy

2019 ◽  
Vol 6 (7) ◽  
pp. 190474 ◽  
Author(s):  
Clelia Gasparini ◽  
Elizabeth M. Speechley ◽  
Giovanni Polverino
Keyword(s):  
Reproductive Success ◽  
Personality Traits ◽  
Sperm Competition ◽  
Poecilia Reticulata ◽  
Positive Association ◽  
Sperm Number ◽  
Sperm Velocity ◽  
Fitness Consequences ◽  
Competitive Success ◽  
Sperm Traits

Assessing the consequences of personality traits on reproductive success is one of the most important challenges in personality studies and critical to understand the evolutionary implications of behavioural variability among animals. Personality traits are typically associated with mating acquisition in males, and, hence, linked to variation in their reproductive success. However, in most species, sexual selection continues after mating, and sperm traits (such as sperm number and quality) become very important in determining post-mating competitive success. Here, we investigate whether variation in personality traits is associated with variation in sperm traits using the guppy ( Poecilia reticulata ), a species with high levels of sperm competition. We found a positive association between boldness and sperm number but not sperm velocity, suggesting that bolder males have increased post-copulatory success than shyer individuals. No association was found between exploration and sperm traits. Our work highlights the importance of considering post-copulatory traits when investigating fitness consequences of personality traits, especially in species with high levels of female multiple matings and hence sperm competition.

scholarly journals An fMRI investigation of the relations between Extraversion, internalizing psychopathology, and neural activation following reward receipt in the Human Connectome Project sample

2020 ◽  
Vol 3 ◽  
Author(s):  
Courtland S. Hyatt ◽  
Emily S. Hallowell ◽  
Max M. Owens ◽  
Brandon M. Weiss ◽  
Lawrence H. Sweet ◽  
...  
Keyword(s):  
Personality Traits ◽  
Personality Trait ◽  
Factor Model ◽  
Five Factor Model ◽  
Effect Sizes ◽  
Levels Of Analysis ◽  
Future Research ◽  
Neural Activation ◽  
Internalizing Psychopathology ◽  
Human Connectome Project

Abstract Quantitative models of psychopathology (i.e., HiTOP) propose that personality and psychopathology are intertwined, such that the various processes that characterize personality traits may be useful in describing and predicting manifestations of psychopathology. In the current study, we used data from the Human Connectome Project (N = 1050) to investigate neural activation following receipt of a reward during an fMRI task as one shared mechanism that may be related to the personality trait Extraversion (specifically its sub-component Agentic Extraversion) and internalizing psychopathology. We also conducted exploratory analyses on the links between neural activation following reward receipt and the other Five-Factor Model personality traits, as well as separate analyses by gender. No significant relations (p < .005) were observed between any personality trait or index of psychopathology and neural activation following reward receipt, and most effect sizes were null to very small in nature (i.e., r < |.05|). We conclude by discussing the appropriate interpretation of these null findings, and provide suggestions for future research that spans psychological and neurobiological levels of analysis.

Effects of Teachers' Marital Status and Child's Family's Marital Status on Teachers' Ratings of a Child

1986 ◽  
Vol 58 (3) ◽  
pp. 959-964 ◽  
Author(s):  
Susan Goldstein-Hendley ◽  
Virginia Green ◽  
James R. Evans
Keyword(s):  
Marital Status ◽  
Personality Traits ◽  
Personality Trait ◽  
Rating Scale ◽  
Family Background ◽  
Family Status ◽  
Trait Rating

The purposes of this study were to assess whether knowledge of a child's family's marital status (divorced home/intact home/family status unknown) and/or teachers' marital status (single/divorced) would affect teachers' ratings of that child's personality traits and predicted behaviors. The study also sought to determine whether raters' marital status and knowledge of family background interacted with these teachers' ratings. The subjects were 27 married and 27 divorced teachers of preschool through Grade five. To test the hypotheses, two instruments were employed. The Personality Trait Rating Scale and the Predicted Behavior in School Scale were used by the teachers to rate behaviors of a 5-yr.-old child observed on a videotape. Knowledge of the child's family's marital status had no significant effect on teachers' ratings on either test. Teachers' own marital status had no significant effect on ratings, and no interaction was noted. Contrary to some earlier research, teachers were not biased in their ratings by knowledge of a child's family's marital status. Similarly, married teachers who had not experienced the divorce process themselves were no more positively or negatively biased in their ratings than were the divorced teachers.

scholarly journals Educational Attainment and Personality Are Genetically Intertwined

2017 ◽  
Vol 28 (11) ◽  
pp. 1631-1639 ◽  
Author(s):  
René Mõttus ◽  
Anu Realo ◽  
Uku Vainik ◽  
Jüri Allik ◽  
Tõnu Esko
Keyword(s):  
Educational Attainment ◽  
Personality Traits ◽  
Personality Trait ◽  
Factor Model ◽  
Five Factor Model ◽  
Molecular Genetic ◽  
Maximum Amount ◽  
Biological Processes ◽  
Psychological Traits ◽  
Polygenic Scores

Heritable variance in psychological traits may reflect genetic and biological processes that are not necessarily specific to these particular traits but pertain to a broader range of phenotypes. We tested the possibility that the personality domains of the five-factor model and their 30 facets, as rated by people themselves and their knowledgeable informants, reflect polygenic influences that have been previously associated with educational attainment. In a sample of more than 3,000 adult Estonians, education polygenic scores (EPSs), which are interpretable as estimates of molecular-genetic propensity for education, were correlated with various personality traits, particularly from the neuroticism and openness domains. The correlations of personality traits with phenotypic educational attainment closely mirrored their correlations with EPS. Moreover, EPS predicted an aggregate personality trait tailored to capture the maximum amount of variance in educational attainment almost as strongly as it predicted the attainment itself. We discuss possible interpretations and implications of these findings.

Personality traits, adjectives and gender

2020 ◽  
Vol 4 (1) ◽  
pp. 16-50
Author(s):  
Heiko Motschenbacher ◽  
Eka Roivainen
Keyword(s):  
Personality Traits ◽  
Personality Trait ◽  
Corpus Linguistics ◽  
American English ◽  
Psychological Analysis ◽  
Usage Patterns ◽  
Google Books ◽  
And Gender ◽  
Interdisciplinary Study ◽  
The Relationship

There have been linguistic studies on the gendering mechanisms of adjectives and psychological studies on the relationship between personality traits and gender, but the two fields have never entered into a dialogue on these issues. This article seeks to address this gap by presenting an interdisciplinary study that explores the gendering mechanisms associated with personality traits and personality trait-denoting adjectives. The findings of earlier work in this area and basic gendering mechanisms relevant to adjectives and personality traits are outlined. This is followed by a linguistic and a psychological analysis of the usage patterns of a set of personality trait adjectives. The linguistic section draws on corpus linguistics to explore the distribution of these adjectives with female, male and gender-neutral personal nouns in the Corpus of Contemporary American English. The psychological analysis relates the usage frequencies of personality trait adjectives with the nouns man, woman and person in the Google Books corpus to desirability ratings of the adjectives.

Personality and Ideology

2021 ◽  
Author(s):  
Danny Osborne ◽  
Nicole Satherley ◽  
Chris G. Sibley
Keyword(s):  
Personality Traits ◽  
Big Five ◽  
Personality Trait ◽  
Negative Relationship ◽  
Big Five Personality Traits ◽  
Openness To Experience ◽  
Big Five Personality ◽  
Vast Literature ◽  
Political Conservatism ◽  
The Relationship

Research since the 1990s reveals that openness to experience—a personality trait that captures interest in novelty, creativity, unconventionalism, and open-mindedness—correlates negatively with political conservatism. This chapter summarizes this vast literature by meta-analyzing 232 unique samples (N = 575,691) that examine the relationship between the Big Five personality traits and conservatism. The results reveal that the negative relationship between openness to experience and conservatism (r = −.145) is nearly twice as big as the next strongest correlation between personality and ideology (namely, conscientiousness and conservatism; r = .076). The associations between personality traits and conservatism were, however, substantively larger in Western, educated, industrialized, rich, and democratic (WEIRD) countries than in non-WEIRD countries. The chapter concludes by reviewing recent longitudinal work demonstrating that openness to experience and conservatism are non-causally related. Collectively, the chapter shows that openness to experience is by far the strongest (negative) correlate of conservatism but that there is little evidence that this association is causal.

scholarly journals Aggressive, Tense or Shy? Identifying Personality Traits from Crowd Videos

2017 ◽  
Author(s):  
Aniket Bera ◽  
Tanmay Randhavane ◽  
Dinesh Manocha
Keyword(s):  
Personality Traits ◽  
Real Time ◽  
Personality Trait ◽  
User Study ◽  
Movement Patterns ◽  
Time Algorithm ◽  
High Density ◽  
Motion Model ◽  
Classification Criterion ◽  
Trait Theory

We present a real-time algorithm to automatically classify the behavior or personality of a pedestrian based on his or her movements in a crowd video. Our classification criterion is based on Personality Trait theory. We present a statistical scheme that dynamically learns the behavior of every pedestrian and computes its motion model. This model is combined with global crowd characteristics to compute the movement patterns and motion dynamics and use them for crowd prediction. Our learning scheme is general and we highlight its performance in identifying the personality of different pedestrians in low and high density crowd videos. We also evaluate the accuracy by comparing the results with a user study.

scholarly journals Big Five Personality Stability, Change, and Codevelopment across Adolescence and Early Adulthood

2017 ◽  
Author(s):  
Jeroen Borghuis ◽  
Jaap J. A. Denissen ◽  
Daniel Leonard Oberski ◽  
Klaas Sijtsma ◽  
Wim H. J. Meeus ◽  
...  
Keyword(s):  
Personality Traits ◽  
Big Five ◽  
Personality Trait ◽  
Rank Order ◽  
Early Adulthood ◽  
Emotional Stability ◽  
Big Five Personality ◽  
Level Change ◽  
Stability Change ◽  
Time Lagged

Using data from two large and overlapping cohorts of Dutch adolescents, containing up to seven waves of longitudinal data each (N = 2,230), the present study examined Big Five personality trait stability, change, and codevelopment in friendship and sibling dyads from age 12 to 22. Four findings stand out. First, the one-year rank-order stability of personality traits was already substantial at age 12, increased strongly from early through middle adolescence, and remained rather stable during late adolescence and early adulthood. Second, we found linear mean-level increases in girls’ conscientiousness, in both genders’ agreeableness, and in boys’ openness. We also found temporal dips (i.e., U-shaped mean-level change) in boys’ conscientiousness and in girls’ emotional stability and extraversion. We did not find a mean-level change in boys’ emotional stability and extraversion, and we found an increase followed by a decrease in girls’ openness. Third, adolescents showed substantial individual differences in the degree and direction of personality trait changes, especially with respect to conscientiousness, extraversion, and emotional stability. Fourth, we found no evidence for personality trait convergence, for correlated change, or for time-lagged partner effects in dyadic friendship and sibling relationships. This lack of evidence for dyadic codevelopment suggests that adolescent friends and siblings tend to change independently from each other and that their shared experiences do not have uniform influences on their personality traits.

scholarly journals Guppies prefer to follow large (robot) leaders irrespective of own size

2018 ◽  
Author(s):  
David Bierbach ◽  
Hauke J. Mönck ◽  
Juliane Lukas ◽  
Marie Habedank ◽  
Pawel Romanczuk ◽  
...  
Keyword(s):  
Body Size ◽  
Risk Taking ◽  
Poecilia Reticulata ◽  
Direct Evidence ◽  
Behavioral Patterns ◽  
Behavioral Differences ◽  
Leaders And Followers ◽  
Biomimetic Robotic Fish ◽  
Risk Taking Behavior ◽  
Swimming Capacity

AbstractBody size is often assumed to determine how successful an individual can lead others with larger individuals being more likely to lead than smaller ones. However, direct evidence for such a relation is scarce. Furthermore, even if larger individuals are more likely to lead, body size correlates often with specific behavioral patterns (e.g., swimming capacity) and it is thus unclear whether larger individuals are more often followed than smaller ones because they are larger or because they behave in a certain way. To control for behavioral differences among differentially-sized leaders, we used biomimetic robotic fish – Robofish – of different sizes. Robofish is accepted as a conspecific by live guppies (Poecilia reticulata) and provides standardized behaviors irrespective of its size. We specifically asked whether larger leaders are preferentially followed when behavior is controlled for and whether the preferences of followers depend on their own body size or their risk taking behavior (‘boldness’). We found that live guppies followed larger Robofish leaders closer than smaller ones and this pattern was independent of the followers’ own body size as well as risk-taking behavior. This is the first study that shows a ‘bigger is better’ pattern in leadership in shoaling fish that is fully independent of behavioral differences between differentially-sized leaders and followers’ own size and personality.

scholarly journals Alcohol use and personality trait change: pooled analysis of six cohort studies

2018 ◽  
Vol 49 (2) ◽  
pp. 224-231 ◽  
Author(s):  
Christian Hakulinen ◽  
Markus Jokela
Keyword(s):  
Alcohol Use ◽  
Cohort Studies ◽  
Personality Traits ◽  
Personality Trait ◽  
Meta Analysis ◽  
Pooled Analysis ◽  
Emotional Stability ◽  
Risky Alcohol ◽  
Average Alcohol

AbstractBackgroundPersonality has been associated with alcohol use, but less is known about how alcohol use may influence long-term personality trait change.MethodsThe present study examines associations between alcohol use and change in the five major personality traits across two measurement occasions (mean follow-up of 5.6 years). A total of 39 722 participants (54% women) were pooled from six cohort studies for an individual-participant meta-analysis. Alcohol use was measured as (1) average alcohol consumption, (2) frequency of binge drinking, (3) symptoms of alcohol use disorder, and (4) a global indicator of risky alcohol use. Changes in the five major personality traits (extraversion, emotional stability, agreeableness, conscientiousness, and openness to experience) were used as outcomes.ResultsRisky alcohol use was associated with increasing extraversion [0.25 T-scores over the mean follow-up of 5.6 years; 95% confidence interval (CI) 0.07–0.44] and decreasing emotional stability (−0.28; 95% CI −0.48 to −0.08), agreeableness (−0.67; 95% CI −0.87 to −0.36), and conscientiousness (−0.58; 95% CI −0.79 to −0.38). Except the association between alcohol use and extraversion, these associations were consistent across cohort studies and across different measures of alcohol use.ConclusionsThese findings suggest that alcohol use is associated with personality trait changes in adulthood.

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