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The Crowded Life Is a Slow Life: Population Density and Life History Strategy
Oliver Sng et al.
Journal of Personality and Social Psychology, forthcoming
Abstract:
The world population has doubled over the last half century. Yet, research on the psychological effects of human population density, once a popular topic, has decreased over the past few decades. Applying a fresh perspective to an old topic, we draw upon life history theory to examine the effects of population density. Across nations and across the U.S. states (Studies 1 and 2), we find that dense populations exhibit behaviors corresponding to a slower life history strategy, including greater future-orientation, greater investment in education, more long-term mating orientation, later marriage age, lower fertility, and greater parental investment. In Studies 3 and 4, experimentally manipulating perceptions of high density led individuals to become more future-oriented. Finally, in Studies 5 and 6, experimentally manipulating perceptions of high density seemed to lead to life-stage-specific slower strategies, with college students preferring to invest in fewer rather than more relationship partners, and an older MTurk sample preferring to invest in fewer rather than more children. This research sheds new insight on the effects of density and its implications for human cultural variation and society at large.
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Association of Facebook Use With Compromised Well-Being: A Longitudinal Study
Holly Shakya & Nicholas Christakis
American Journal of Epidemiology, forthcoming
Abstract:
Face-to-face social interactions enhance well-being. With the ubiquity of social media, important questions have arisen about the impact of online social interactions. In the present study, we assessed the associations of both online and offline social networks with several subjective measures of well-being. We used 3 waves (2013, 2014, and 2015) of data from 5,208 subjects in the nationally representative Gallup Panel Social Network Study survey, including social network measures, in combination with objective measures of Facebook use. We investigated the associations of Facebook activity and real-world social network activity with self-reported physical health, self-reported mental health, self-reported life satisfaction, and body mass index. Our results showed that overall, the use of Facebook was negatively associated with well-being. For example, a 1-standard-deviation increase in "likes clicked" (clicking "like" on someone else's content), "links clicked" (clicking a link to another site or article), or "status updates" (updating one's own Facebook status) was associated with a decrease of 5%-8% of a standard deviation in self-reported mental health. These associations were robust to multivariate cross-sectional analyses, as well as to 2-wave prospective analyses. The negative associations of Facebook use were comparable to or greater in magnitude than the positive impact of offline interactions, which suggests a possible tradeoff between offline and online relationships.
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Emotional support during times of stress: Can text messaging compete with in-person interactions?
Susan Holtzman et al.
Computers in Human Behavior, forthcoming
Abstract:
There has been a recent and dramatic surge in the popularity of text messaging as a means of connecting with our social networks. The current research represents the first randomized controlled studies to directly compare both the social and emotional impact of social support provided in-person versus through text messaging. In two lab-based experiments, emerging adults completed a stressful task and were randomly assigned to receive emotional support either in-person, via text messaging, or no support at all. Support was provided by a close friend in experiment 1 (n = 64), and by a similar-aged confederate in experiment 2 (n = 188). In both experiments, in-person support was associated with significantly higher positive affect compared to text messaging. In-person support also led to greater satisfaction with support, but only in experiment 2. Overall, this research suggests that there may be emotional costs to a reliance on digital forms of social communication during times of stress.
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The Novelty Penalty: Why Do People Like Talking About New Experiences but Hearing About Old Ones?
Gus Cooney, Daniel Gilbert & Timothy Wilson
Psychological Science, forthcoming
Abstract:
People often tell each other stories about their past experiences. But do they tell the right ones? Speakers and listeners predicted that listeners would enjoy hearing novel stories (i.e., stories about experiences the listeners had never had) more than familiar stories (i.e., stories about experiences the listeners had already had). In fact, listeners enjoyed hearing familiar stories much more than novel ones (Studies 1 and 2). This did not happen because the familiar and novel stories differed in their content or delivery (Study 3). Rather, it happened because human speech is riddled with informational gaps, and familiar stories allow listeners to use their own knowledge to fill in those gaps (Study 4). We discuss reasons why novel stories are more difficult to tell, and why familiar stories are more enjoyable to hear, than either speakers or listeners expect.
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Michael Zoorob & Jason Salemi
Drug and Alcohol Dependence, forthcoming
Methods: We conducted an ecologic temporal trends study from 1999-2014 to investigate the association between mortality due to drug overdose and social capital. Data from multiple sources were compiled at the county-level to produce an analytic dataset comprising overdose mortality, social capital, and a host of potentially confounding variables indicated by the literature (N = 49,664 county-years). Multinomial logistic regression was used to estimate the likelihood that a county falls in low (<4 deaths per 100,000), moderate, or high (>16 deaths per 100,000) categories of annual overdose morality.
Results: We observed a strong and statistically significant inverse association between county-level social capital and age-adjusted mortality due to drug overdose (p < 0.01). Compared to the lowest quintile of social capital, counties at the highest quintile were 83% less likely to fall in the "high-overdose" category and 75% less likely to fall in the "moderate-overdose" category.
Conclusion: This study finds large-sample evidence that social capital protects communities against drug overdose. This finding could help guide policymakers in identifying where overdose epidemics are likely to occur and how to ameliorate them.
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Wu Youyou et al.
Psychological Science, forthcoming
Abstract:
Friends and spouses tend to be similar in a broad range of characteristics, such as age, educational level, race, religion, attitudes, and general intelligence. Surprisingly, little evidence has been found for similarity in personality - one of the most fundamental psychological constructs. We argue that the lack of evidence for personality similarity stems from the tendency of individuals to make personality judgments relative to a salient comparison group, rather than in absolute terms (i.e., the reference-group effect), when responding to the self-report and peer-report questionnaires commonly used in personality research. We employed two behavior-based personality measures to circumvent the reference-group effect. The results based on large samples provide evidence for personality similarity between romantic partners (n = 1,101; rs = .20-.47) and between friends (n = 46,483; rs = .12-.31). We discuss the practical and methodological implications of the findings.