Fast Life History Strategy Research Articles

Too Many Males or Too Many Females? Classroom Sex Ratio, Life History Strategies and Risk-Taking Behaviors

Prior research finds that sex ratio, defined as the proportion of males and females in a given context, is related to engagement in risk-taking behaviors. However, most research operationalizes sex ratio at a local context (e.g., regional or county), which fails to reflect with precision the sex ratios contexts of individuals at a closer level. Furthermore, the relationship between sex ratio and risk-taking behaviors may be affected by individuals’ life history strategy, with previous studies showing fast life history strategies linked to risk-taking behaviors, compared to slow life history strategies. The present study analyzes the relationship between classroom sex ratio and risk-taking behaviors and the interaction between classroom sex ratio and life history strategy in adolescents. The sample comprised 1214 participants nested in 57 classrooms, 49.75% females, 91.5% Spanish and a mean age of 16.15 years (SD = 1.23, range 14–21). Results from multilevel modeling showed a negative relation between classroom sex ratio and risk-taking behaviors in female adolescents with faster life history strategy. By contrast, classroom sex ratio in male adolescents related positively to risk-taking behaviors but did not interact with life history strategy. These findings underscore the importance of studying proximate sex ratio on risk-taking behaviors in adolescents and underline its potential influence in the development and expression of life history strategies.

Fast, but not so furious. On the distinctiveness of a fast life history strategy and the common core of aversive traits

Evolutionary Psychology has considered a Fast Life History Strategy (FLHS), denoting an individual’s tendency to invest more resources in proliferation than in child-rearing, to be responsible for the emergence of aversive traits. Empirical evidence for this notion has been inconsistent, however. Herein, we tested whether FLHS is an adequate representation of the underlying disposition of aversive traits (N = 869). To this end, we considered twelve specific aversive traits, and additionally measured and modeled the common core of these traits. We found only weak correlations of FLHS with individual aversive traits as well as with their common core. In sum, the results suggest that the common core of aversive traits is only marginally reflected in FLHS.

Early pubertal development and deviant behavior: A three-year longitudinal study among early adolescents

According to a life history perspective, deviant behaviors are predicted by fast life history strategies and early sexual maturation is considered a marker of the underlying fast life history strategy. The aim of the present three-year longitudinal study was to investigate the influence of early pubertal maturation on deviant behaviors among early adolescents. A sample of Italian early adolescents (n = 614; 51% were male participants) completed a survey questionnaire three times, in the second term of their first (Mage = 11.31, SD = 0.49), second, and third middle school grades. Using a parallel process latent growth curve model, the results revealed that baseline levels of early pubertal development did not predict change over time in deviant behavior. In addition, the rate of change of pubertal maturation did not predict change over time in deviant behavior. Finally, we found that the relationship between the rate of change of pubertal maturation and change over time in deviant behavior is moderated by baseline levels of deviant behavior. Overall, findings suggest that the notion of a direct relationship between early pubertal maturation and deviant behavior among early adolescents, in general, is not supported.

Life History Strategies, Prestige, and Dominance: An Evolutionary Developmental View of Social Hierarchy.

Although evidence documents the use of prestige and dominance for navigating group hierarchies, little is known about factors that explain people's orientation toward prestige versus dominance. The current research applied a life history perspective to assess the role life history strategies play in prestige and dominance. Four studies document associations between adopting a slow life history strategy and having an orientation toward prestige. We also saw some (less consistent) evidence that people's orientation toward prestige is rooted in exposure to predictable childhood environments, a known antecedent of slow life history strategies. Although we observed some evidence that exposure to unpredictable childhood environments was associated with dominance, there was little direct evidence that this relationship was explained by a fast life history strategy. Findings suggest that an orientation toward prestige is likely to be observed in people with a slow life history, who adopt a long-term time horizon for planning and decision-making.

Supplemental Material for Lower Emotional Awareness Is Associated With Greater Early Adversity and Faster Life History Strategy

Supplemental Material for Lower Emotional Awareness Is Associated With Greater Early Adversity and Faster Life History Strategy

Testing links between unfavorable living conditions, fast life-history strategy adoption, and overeating: a four-wave longitudinal study.

Although overeating increases risk for chronic illness and premature mortality, evolutionary life-history theorists posit that such behaviors arise as a potential outcome of using fast life-history strategies to function in environments that are harsh or unpredictable. To test this premise, we examined links between harsh, unpredictable living conditions (HULC), the adoption of fast life-history (LH) strategies, and overeating among early adolescents using a four-wave longitudinal design. Participants were 2547 Chinese adolescents (1202 girls, 1345 boys) who completed baseline questionnaires assessing experiences of HULC, preferences for use of fast LH strategies, and overeating. Measures were re-administered in follow-ups 7, 13, and 20 months later. Analyses indicated HULC predicted increased use of fast LH strategies within each gender. However, fast LH strategy adoption contributed to increases in overeating only among girls. Findings supported specific tenets of life-history theory and underscored gender as an important consideration in understanding links between living conditions, the adoption of fast LH strategies, and risk for overeating. Interventions focused on reducing poverty and increasing stable, nurturing family, and community environments may aid in reducing overeating and obesity for adolescents.

Child attachment in adjusting the species-general contingency between environmental adversities and fast life history strategies.

Extrinsic mortality risks calibrating fast life history (LH) represent a species-general principle that applies to almost all animals including humans. However, empirical research also finds exceptions to the LH principle. The present study proposes a maternal socialization hypothesis, whereby we argue that the more human-relevant attachment system adds to the LH principle by up- and down-regulating environmental harshness and unpredictability and their calibration of LH strategies. Based on a longitudinal sample of 259 rural Chinese adolescents and their primary caregivers, the results support the statistical moderating effect of caregiver-child attachment on the relation between childhood environmental adversities (harshness and unpredictability) and LH strategies. Our theorizing and findings point to an additional mechanism likely involved in the organization and possibly the slowdown of human LH.

Can impulsivity evolve in response to childhood environmental harshness?

Previous studies have suggested that human impulsivity is an adaptive response to childhood environmental harshness: individuals from families of low socioeconomic status (SES) tend to be more impulsive. However, no studies have tested the evolvability of this reaction norm. This study examined whether (a) impulsivity is associated with higher fitness among individuals from low SES families, while (b) it is associated with lower fitness among individuals from high SES families. We assessed three indices of impulsivity (temporal discounting, risk taking and fast/slow life history strategy), childhood SES and five proxy indices of fitness (number of children, lifelong singlehood, annual household income, subjective SES and life satisfaction) of 692 middle-aged participants (40-45 years old). None of the results supported the evolvability of the impulsivity reaction norm, although low childhood SES was associated with lower fitness on every proxy measure. Impulsivity (operationalised as the fast life history strategy) was associated with lower fitness regardless of childhood SES.

Towards positive organization. The evolution of gratitude

Purpose: Establishing the way the life history (LH) strategies and gratitude are related to each other. Design/methodology/approach: Life History Theory provides an evolutionary framework for understanding specific developmental paths of species and individuals. There are certain trade- offs during a lifespan of an individual, they must face (for instance, somatic or reproductive effort, quality or quantity of offspring, mating or parenting). Depending on the choices a person makes, they exhibit a slow or a fast life history (LH) strategy. A latent variable underlying a set of solutions (strategy) is called K-Factor and is used to measure individual differences with regard to the pace of one’s LH. People with a slow LH exhibit greater prosociality, tend to form long-term sexual relationships and their sexual maturation is slowed down. On the other hand, gratitude facilitates prosociality and altruism, builds social resources and acts as a moral barometer. In recent years we observe an increasing attention to the issue of gratitude both in academic publications and popular press in various fields including economics, management and organizational sciences. All these disciplines draw from relatively new and contemporarily flourishing field of psychology – positive psychology. We deployed the Gratitude Questionnaire (GQ-6) for the measurement of gratitude and the Mini-K Short Form for the measurement of LH strategies. 197 students took part in the study (138 females, 59 males). Findings: A positive correlation between slow LH strategy and gratitude was found in women. Originality/value: Investigations on the relationship between gratitude and LH strategies show a fragment of the landscape of human personality. Slow LH people seem to be more grateful and thus display more prosocial traits while restraining selfishness which can lead to achieving the delayed social benefits. On the other hand, low-K individuals in organizational context have smaller willingness/ability to reciprocate to their benefactors and to build social bonds. Such individuals presenting exploitative interpersonal style should be detected at the beginning of a selection process by HR specialists. Keywords: life history theory, life history strategies, gratitude, positive psychology, positive psychology interventions in organizations. Category of the paper: research paper.

Psychosocial and energetic factors on human female pubertal timing: a systematized review.

Childhood psychosocial stressors have been proposed to favour fast life history strategies promoting earlier puberty in females. However, studies demonstrating this association often do not elucidate causal mechanisms, nor account for greater childhood energetic availability - also known to promote rapid growth and earlier puberty. To assess the extent to which such confounding has been considered, we conducted a systematized review to identify studies examining measures of both prepubertal growth (e.g. weight, height) and psychosocial stressors (e.g. adversity, father absence) in relation to female pubertal timing. A total of 1069 non-duplicated studies were identified across five databases. Twenty studies met selection criteria for critical review following independent screening of titles, abstracts and manuscripts. Within these studies, measures indicative of rapid childhood growth were more consistently associated with earlier pubertal timing than were measures of psychosocial stress. We discuss future research directions to investigate the impact of psychosocial stress on pubertal timing more robustly, including methodological and mechanistic considerations, and contextualization of findings by socioecological environments.

Time Wasters?

Abstract. The Dark Triad personality traits have previously been linked with dysfunctional types of procrastination (i.e., delaying certain tasks). From an evolutionary perspective, procrastination is recognized for facilitating a fast life history strategy. The present study investigated links between active and passive procrastination and the extended Dark Tetrad personality traits (psychopathy, Machiavellianism, narcissism, sadism). Participants ( N = 357) were invited via Prolific data collection platform and Survey Circle research sites to participate in an online survey exploring personality and procrastination. Path analyses revealed that all Dark Tetrad traits positively predicted several aspects of active procrastination only. Narcissism emerged as the only negative predictor of passive procrastination. Rather than linking these traits with dysfunctional procrastination types only, our results highlight the importance of considering the Dark Tetrad about functional forms of procrastination, which may be more beneficial for facilitating a fast life history strategy.

Trade-Offs Between Growth Rate and Other Fungal Traits

If we better understand how fungal responses to global change are governed by their traits, we can improve predictions of fungal community composition and ecosystem function. Specifically, we can examine trade-offs among traits, in which the allocation of finite resources toward one trait reduces the investment in others. We hypothesized that trade-offs among fungal traits relating to rapid growth, resource capture, and stress tolerance sort fungal species into discrete life history strategies. We used the Biolog Filamentous Fungi database to calculate maximum growth rates of 37 fungal species and then compared them to their functional traits from the funfun database. In partial support of our hypothesis, maximum growth rate displayed a negative relationship with traits related to resource capture. Moreover, maximum growth rate displayed a positive relationship with amino acid permease, forming a putative Fast Growth life history strategy. A second putative life history strategy is characterized by a positive relationship between extracellular enzymes, including cellobiohydrolase 6, cellobiohydrolase 7, crystalline cellulase AA9, and lignin peroxidase. These extracellular enzymes were negatively related to chitosanase 8, an enzyme that can break down a derivative of chitin. Chitosanase 8 displayed a positive relationship with many traits that were hypothesized to cluster separately, forming a putative Blended life history strategy characterized by certain resource capture, fast growth, and stress tolerance traits. These trait relationships complement previously explored microbial trait frameworks, such as the Competitor-Stress Tolerator-Ruderal and the Yield-Resource Acquisition-Stress Tolerance schemes.

Disease Prevalence and Fatality, Life History Strategies, and Behavioral Control of the COVID Pandemic

The COVID-19 pandemic caught the world by surprise and raised many questions. One of the questions is whether infectious diseases indeed drive fast life history (LH) as the extent research suggests. This paper challenges this assumption and raises a different perspective. We argue that infectious diseases enact either slower or faster LH strategies and the related disease control behavior depending on disease severity. We tested and supported the theorization based on a sample of 662 adult residents drawn from all 32 provinces and administrative regions of mainland China. The findings help to broaden LH perspectives and to better understand unusual social phenomena arising from the COVID-19 pandemic.

Leaving without a word: Ghosting and the Dark Triad traits

Researchers have extensively explored the early and middle stages of romantic and sexual relationships for those high on the Dark Triad traits (i.e., psychopathy, Machiavellianism, and narcissism) but they have generally missed the termination stage of relationships. In this study we examined (N = 341) the role these traits play in one termination strategy, ghosting. Ghosting is when a person discontinues a relationship through silence; it is considered an indirect form of relationship termination. We found that (1) those who reported ghosting someone in the past (vs. those who did not) found ghosting to be acceptable and were more Machiavellian and psychopathic, (2) ghosting was most acceptable in the short-term (vs. long-term) context especially for those who had previously ghosted someone, and (3) those high in the Dark Triad traits rated ghosting more acceptable to terminate short-term relationships, but not long-term ones. We also found that the correlations between acceptability and ghosting short-term partners and the Dark Triad traits was localized to narcissistic men with a similar-yet-weak effect for psychopathy. Results are discussed in relation to how ghosting may be primarily committed by people who are interested in casual sex where investment is low and may be part of the fast life history strategies linked to the Dark Triad traits.

Acute stress can boost and buffer hedonic consumption: The role of individual differences in consumer life history strategies

Mixed findings on the relationship between acute stress and the tendency to engage in hedonic food consumption suggest that stress may both boost and buffer hedonic eating. The present research aims to contribute to reconciling these mixed findings by focusing on the role of individual differences in consumer life history strategies (LHS) –short-term, impulsive, reward-sensitive (fast) vs. long-term, reflective, goal-oriented (slow) self-regulatory strategies– that might drive hedonic eating. We propose and show that stress may boost hedonic consumption among fast LHS consumers, while the relationship is buffered (non-significant) among their slow LHS counterparts. Moreover, we find that this stress-induced eating among fast LHS consumers is also cue-driven such that fast (but not slow) LHS consumers show a higher sensitivity to scarcity cues signaling the desirability of a palatable food under conditions of stress. Finally, we find that a cue indicating a high caloric content of the food may curb the tendency for fast LHS consumers to engage in (over) consumption of hedonic foods under stress.

Into the Unknown: Uncertainty and Procrastination in Students From a Life History Perspective

While existing findings have established an increase in procrastination among students in higher education during COVID-19, they do not elucidate how COVID-19 has effected an increase in procrastination. Drawing upon previous findings and employing a life history framework, this paper proposed that the increase in procrastination may be attributed to the heightened levels of uncertainty in the pandemic. Additionally, this paper examined life history strategy as the psychological mechanism underlying the relation between uncertainty and procrastination. By collecting data across two school semesters in a university (N = 253), we found that uncertainty and procrastination did not differ between the semester where changes were abruptly imposed to stem the spread of COVID-19 and the following semester. Our findings also revealed that uncertainty predicted procrastination, and that life history strategy mediated the relation between uncertainty and procrastination. Specifically, uncertainty was associated with a faster life history strategy, which was positively associated with procrastination. By shedding light on the psychology behind the effect of uncertainty on procrastination, the findings of this paper hold important implications for the design of procrastination interventions for the uncertain climate during the pandemic and “the new normal” post COVID-19.

Associations between distinct dimensions of early life adversity and accelerated reproductive strategy among middle-aged women in China

Life history theory argues that unpredictable and harsh conditions such as early life adversity tends to produce a fast life history strategy, characterized by early sexual maturation and less parenting of offspring. It remains unclear whether all forms of early life adversity are associated with accelerated reproductive strategy, and most previous studies predominantly focused on single form of reproductive strategy indicators. To examine the associations between 2 distinct dimensions of early life adversity (ie, threat and deprivation) and reproductive strategies across global metrics. We used data from 9674 middle-aged women of the China Health and Retirement Longitudinal Study. The experiences of threat and deprivation were assessed using the Life History Survey Questionnaire in 2014. Reproductive strategy information was assessed via self-report from the follow-up of 2013, 2015 and 2018, including age at menarche, age at natural menopause, age at first birth, total number of children, and number of abortions. Multivariate linear regression analyses were performed to assess the associations between distinct dimensions of early life adversity and multiple reproductive strategy indicators, adjusting for age, Hukou location, family socioeconomic status in adulthood and body mass index. Of the 9674 women (mean [standard deviation] age at baseline, 55.89 [10.23] years), 4084 (42.20%) reported exposure to threat-related early life adversity and 7332 (75.79%) reported exposure to deprivation-related early life adversity. Early life adversity characterized by threat was associated with accelerated reproductive strategy. Compared with women who have no experiences of threat-related early life adversity, ≥3 threat-related early life adversity was associated with 3.7-month earlier age at menarche (β=-0.31, 95% confidence interval,-0.53 to-0.08; P=.007), 8.6-month earlier age at natural menopause (β=-0.72, 95% confidence interval,-1.29 to-0.15; P=.013), >1-year earlier age at first birth (β=-1.14, 95% confidence interval,-1.58 to-0.71; P<.0001), and an increased total number of children (β=0.25, 95% confidence interval, 0.10-0.41; P=.002). In contrast, experiences of deprivation were associated with delayed age at natural menopause (β=.50, 95% confidence interval, 0.06-0.94; P=.025) and increased number of abortions (β=.17, 95% confidence interval, 0.01-0.34, P=.037), in models adjusting for co-occurring threat exposures. This study suggests that early life adversity characterized by threat was associated with accelerated reproductive strategy, whereas deprivation was associated with slower reproduction strategy. Future research should clarify the biological pathways between different dimensions of early life adversity and reproductive strategies and further determine whether accelerated reproduction is an adaptive response to early life adversity in humans.

A bet-hedging strategy rather than just a classic fast life-history strategy exhibited by invasive fall armyworm

A bet-hedging strategy rather than just a classic fast life-history strategy exhibited by invasive fall armyworm

Associations between early life harshness, parents' parenting style, and relationship quality in China

AbstractPrevious studies revealed that early life stress is associated with romantic relationship quality in the life history perspective in Western nations. The current study examined the relationships between life history strategy, early life harshness/parents' parenting style, and romantic relationship quality, as well as life history strategy as a mediator in the association between early life harshness/parents' parenting style and relationship quality in China. A total of 263 individuals in romantic relationships participated in a questionnaire survey. Results revealed the direct effects of early life harshness/parents' parenting style and relationship quality. Both early life harshness and parents' parenting style have indirect effects on relationship quality through the life history strategy → communication/commitment paths. Thus, individuals with childhood adverse experiences and harsh parents' parenting style were more inclined to adopt a fast life history strategy, which was negatively associated with relationship quality.

A preregistered study of the relationship between childhood socioeconomic background, life history strategies and conformity

We conducted a high powered pre-registered study to investigate the relationship between childhood socioeconomic status, the adoption of different life history strategies and conformity. Contrary to our expectation we found no direct relationship between childhood socioeconomic background and conformity. However, we discovered a significant association between life history strategies and conformity. People who adopt fast (slow) life history strategies conform less (more) to social suggestions. Furthermore, we found a relationship between childhood socioeconomic background and life history strategies, with people from low (high) childhood socioeconomic backgrounds adopting fast (slow) life history strategies.