Online Dating in New Zealand: Why and how do people use Tinder?

<p>Online dating is becoming increasingly popular all over the world. However there is a dearth of research investigating online dating in New Zealand. The research presented here explores the prevalence of online dating in New Zealand, examining motivations, attitudes and outcomes associated with online dating (Study 1). It also investigates mate selection in an online dating context using a simulation of the popular mobile dating app, Tinder (Study 2). In Study 1, students from Victoria University of Wellington completed a survey developed by the author along with scales measuring individual differences on ideal standards and sociosexual orientation. As predicted, Study 1 found that online dating is prevalent in this sample (especially using Tinder), attitudes towards it were generally positive, and those using it more were more likely to be single, more sociosexually unrestricted, and rate physical attractiveness as more important in potential partners. Study 2 investigated the use of Tinder more specifically through an experimental simulation of this mobile dating app. Participants were presented with series of attractive and unattractive faces and asked to indicate whether they would hypothetically seek further contact (click heart icon to the right of the face) or uninterested (click cross icon to the left of the face). Response times and selections were recorded. As expected, men selected more faces than women, and responded equally rapidly regardless of the attractiveness of the face. In contrast, women responded significantly faster to the unattractive faces than the attractive faces. Results were predicted and interpreted in light of parental investment theory and in the context of prior research on both online dating and speed dating.</p>

Online Dating in New Zealand: Why and how do people use Tinder?

<p>Online dating is becoming increasingly popular all over the world. However there is a dearth of research investigating online dating in New Zealand. The research presented here explores the prevalence of online dating in New Zealand, examining motivations, attitudes and outcomes associated with online dating (Study 1). It also investigates mate selection in an online dating context using a simulation of the popular mobile dating app, Tinder (Study 2). In Study 1, students from Victoria University of Wellington completed a survey developed by the author along with scales measuring individual differences on ideal standards and sociosexual orientation. As predicted, Study 1 found that online dating is prevalent in this sample (especially using Tinder), attitudes towards it were generally positive, and those using it more were more likely to be single, more sociosexually unrestricted, and rate physical attractiveness as more important in potential partners. Study 2 investigated the use of Tinder more specifically through an experimental simulation of this mobile dating app. Participants were presented with series of attractive and unattractive faces and asked to indicate whether they would hypothetically seek further contact (click heart icon to the right of the face) or uninterested (click cross icon to the left of the face). Response times and selections were recorded. As expected, men selected more faces than women, and responded equally rapidly regardless of the attractiveness of the face. In contrast, women responded significantly faster to the unattractive faces than the attractive faces. Results were predicted and interpreted in light of parental investment theory and in the context of prior research on both online dating and speed dating.</p>

Reed Warbler Hosts Do Not Fine-Tune Mobbing Defenses During the Breeding Season, Even When Cuckoos Are Rare

Hosts of brood parasitic cuckoos often employ mobbing attacks to defend their nests and, when mobbing is costly, hosts are predicted to adjust their mobbing to match parasitism risk. While evidence exists for fine-tuned plasticity, it remains unclear why mobbing does not track larger seasonal changes in parasitism risk. Here we test a possible explanation from parental investment theory: parents should defend their current brood more intensively as the opportunity to replace it declines (re-nesting potential), and therefore “counteract” any apparent seasonal decline to match parasitism risk. We take advantage of mobbing experiments conducted at two sites where reed warblers (Acrocephalus scirpaceus) experience (in Italy), or do not experience (in Finland), brood parasitism. We predicted that mobbing of cuckoos should be higher overall in Italy, but remain constant over the season as in other parasitised sites, whereas in Finland where cuckoos do not pose a local threat, we predicted that mobbing should be low at the beginning of the season but increase as re-nesting potential declined. However, while cuckoos were more likely to be mobbed in Italy, we found little evidence that mobbing changed over the season at either the parasitized or non-parasitized sites. This suggests that re-nesting potential has either little influence on mobbing behavior, or that its effects are obscured by other seasonal differences in ecology or experience of hosts.

The role of sex and femininity in preferences for unfamiliar infants among Chinese adults

Guided by parental investment theory and social role theory, this study aimed to understand current contradictory results regarding sex differences in response to infant faces by considering the effect of gender role orientation. We recruited 300 adults in China and asked them to complete an Interest in Infants questionnaire and a Bem Sex Role Inventory and then administered a behavioral assessment that used unfamiliar infant faces with varying expressions (laughing, neutral, and crying) as stimuli to gauge three components of motivation towards infants (i.e., liking, representational responding, and evoked responding). The results demonstrated that sex differences emerged only in self-reported interest in infants, but no difference was found between the sexes in terms of their hedonic reactions to infant faces. Furthermore, femininity was found to correlate with preferences for infants in both verbal and visual tests, but significant interactive effects of feminine traits and sex were found only in the behavioral test. The findings indicated that men’s responses to infants were influenced more by their feminine traits than were women’s responses, potentially explaining the greater extent to which paternal (vs. maternal) investment is facultative.

Birth order and gender : differential parental investment in Medieval England and France in the eleventh, twelfth, and thirteenth centuries

This dissertation addresses the question: will parents invest differently in their children based on gender and birth order? Using parental investment theory and four major sets of outcome variables--child survival, parental investment (through wealth, land, and titles), marriage, and reproductive success--this question will be examined in an historic population, medieval England and France in the eleventh, twelfth, and thirteenth centuries. The results presented in this dissertation shows that parents were willing to invest in their offspring differentially with a preference for sons over daughters and older children over younger children. Historic populations provide a microcosm in which to study human behavior. The findings in this dissertation have implications for both evolutionary ecology and evolutionary demography.

Predator defense is shaped by risk, brood value and social group benefits in a cooperative breeder

Predation is a major cause of mortality and nest failure in birds. Cooperative predator defense can enhance nest success and adult survival but, because it is inherently risky, dynamic risk assessment theory predicts that individuals modify defense behavior according to the risk posed by the predator. Parental investment theory, on the other hand, predicts that reproductive payoffs (brood value) determine investment in nest defense. We propose that, in cooperative breeders, fitness benefits deriving from the survival of other group members may additionally influence defense behavior (social group benefits theory). We tested predictions of these theories in the cooperatively breeding purple-crowned fairy-wren, Malurus coronatus, where brood value is higher for breeders, but social group benefits more important for helpers. We recorded experimentally induced individual defense behaviors in response to predator models presented near nests, representing differing levels of threat to nests and adults. As predicted, 1) individuals engaged in less risky defenses when encountering a more dangerous predator (dynamic risk assessment theory); 2) individuals defended older broods more often, and breeders defended more than helpers (parental investment theory); and 3) helpers were more likely to respond to a predator of adults (social group benefits theory). Our findings highlight that predator defense in cooperative breeders is complex, shaped by the combination of immediate risk and multiple benefits.

Mother's social status is associated with child health in a horticulturalist population

High social status is often associated with greater mating opportunities and fertility for men, but do women also obtain fitness benefits of high status? Greater resource access and child survivorship may be principal pathways through which social status increases women's fitness. Here, we examine whether peer-rankings of women's social status (indicated by political influence, project leadership, and respect) positively covaries with child nutritional status and health in a community of Amazonian horticulturalists. We find that maternal political influence is associated with improved child health outcomes in models adjusting for maternal age, parental height and weight, level of schooling, household income, family size, and number of kin in the community. Children of politically influential women have higher weight-for-age ( B = 0.33; 95% CI = 0.12–0.54), height-for-age ( B = 0.32; 95% CI = 0.10–0.54), and weight-for-height ( B = 0.24; 95% CI = 0.04–0.44), and they are less likely to be diagnosed with common illnesses (OR = 0.48; 95% CI = 0.31–0.76). These results are consistent with women leveraging their social status to enhance reproductive success through improvements in child health. We discuss these results in light of parental investment theory and the implications for the evolution of female social status in humans.