Social and Behavioral Sciences Commons^™

From Mind To Matter: Patterns Of Innovation In The Archaeological Record And The Ecology Of Social Learning, Kathryn Demps, Nicole M. Herzog, Matt Clark

Anthropology Faculty Publications and Presentations

Archaeology and cultural evolution theory both predict that environmental variation and population size drive the likelihood of inventions (via individual learning) and their conversion to population-wide innovations (via social uptake). We use the case study of the adoption of the bow and arrow in the Great Basin to infer how patterns of cultural variation, invention, and innovation affect investment in new technologies over time and the conditions under which we could predict cultural innovation to occur. Using an agent-based simulation to investigate the conditions that manifest in the innovation of technology, we find the following: (1) increasing ecological variation results …

Inheritance And Inequality Among Nomads Of South Siberia, Paul L. Hooper, Adam Z. Reynolds, Bayarsaikhan Jamsranjav, Julia K. Clark, John P. Ziker, Stefani A. Crabtree

Anthropology Faculty Publications and Presentations

At the headwaters of the Yenisei River in Tuva and northern Mongolia, nomadic pastoralists move between camps in a seasonal rotation that facilitates their animals' access to high-quality grasses and shelter. The use and informal ownership of these camps depending on season helps illustrate evolutionary and ecological principles underlying variation in property relations. Given relatively stable patterns of precipitation and returns to capital improvement, families generally benefit from reusing the same camps year after year. We show that locations with higher economic defensibility and capital investment—winter camps and camps located in mountain/river valleys—are claimed and inherited more frequently than summer …

Social Networks And Instructional Reform In Stem: The Teaching-Research Nexus, Katherine Kappelman, John P. Ziker, Karl Mertens, Brittnee Earl, Susan E. Shadle

Anthropology Faculty Publications and Presentations

Instructional reform in STEM aims for the widespread adoption of evidence based instructional practices (EBIPS), practices that implement active learning. Research recognizes that faculty social networks regarding discussion or advice about teaching may matter to such efforts. But teaching is not the only priority for university faculty – meeting research expectations is at least as important and, often, more consequential for tenure and promotion decisions. We see value in understanding how research networks, based on discussion and advice about research matters, relate to teaching networks to see if and how such networks could advance instructional reform efforts. Our research examines …

The Association Of Sex Ratio On Suicide Rates In United States Counties: An Exploration Of Mechanisms, Kristin Snopkowski, Hallie Turner

Anthropology Faculty Publications and Presentations

Researchers have long puzzled over suicidal behavior. In this paper, we posit that when people are unable to attract mates given unfavorable sex ratios, suicide rates increase. Sex ratio, the proportion of males in a population, is linked to a variety of behaviors, including marriage stability, violence, depression, and infidelity. We test whether suicide rates are associated with county-level sex ratios utilizing data from 1999 to 2018, controlling for a variety of factors known to be associated with suicide risk. We find that sex ratio is associated with suicide rates, where a greater proportion of males in a county (age …

Reproductive Inequality In Humans And Other Mammals, John Ziker, Karl J. Mertens

Anthropology Faculty Publications and Presentations

To address claims of human exceptionalism, we determine where humans fit within the greater mammalian distribution of reproductive inequality. We show that humans exhibit lower reproductive skew (i.e., inequality in the number of surviving offspring) among males and smaller sex differences in reproductive skew than most other mammals, while nevertheless falling within the mammalian range. Additionally, female reproductive skew is higher in polygynous human populations than in polygynous nonhumans mammals on average. This patterning of skew can be attributed in part to the prevalence of monogamy in humans compared to the predominance of polygyny in nonhuman mammals, to the limited …

Centring Individual Animals To Improve Research And Citation Practices, Shelly Volsche, Holly Root-Gutteridge, Anna T. Korzeniowska, Alexandra Horowitz

Anthropology Faculty Publications and Presentations

Modern behavioural scientists have come to acknowledge that individual animals may respond differently to the same stimuli and that the quality of welfare and lived experience can affect behavioural responses. However, much of the foundational research in behavioural science lacked awareness of the effect of both welfare and individuality on data, bringing their results into question. This oversight is rarely addressed when citing seminal works as their findings are considered crucial to our understanding of animal behaviour. Furthermore, more recent research may reflect this lack of awareness by replication of earlier methods – exacerbating the problem. The purpose of this …

Parental Status Influences Human-To-Pet Caregiving Behaviors, Attachment, And Attitudes In A Finnish Sample, Shelly Volsche, Sydney Schultz, Sara Alsaifi, Marika Melamies, Jari Pulkkinen

Anthropology Faculty Publications and Presentations

A growing body of literature suggests people are choosing to forego parenthood, bringing companion animals into the home as a focus for people’s attachment and caretaking behavior instead. This emergent “pet parenting” can be defined as the parent-like investment in companion animals and has been linked to countries that are experiencing or have experienced the Second Demographic Transition (SDT) marked by subreplacement fertility, changing marriage norms, increased educational attainment, and a flexible life orientation no longer focused solely on reproduction. In this research, we sought to determine if Finland, a country where the SDT has already been evidenced, is also …

Development Of The Cooperative Adoption Factors Instrument To Measure Factors Associated With Instructional Practice In The Context Of Institutional Change, John P. Ziker, Brittnee Earl, Karl Mertens, Susan E. Shadle

Anthropology Faculty Publications and Presentations

Background: Many institutional and departmentally focused change efforts have sought to improve teaching in STEM through the promotion of evidence-based instructional practices (EBIPs). Even with these efforts, EBIPs have not become the predominant mode of teaching in many STEM departments. To better understand institutional change efforts and the barriers to EBIP implementation, we developed the Cooperative Adoption Factors Instrument (CAFI) to probe faculty member characteristics beyond demographic attributes at the individual level. The CAFI probes multiple constructs related to institutional change including perceptions of the degree of mutual advantage of taking an action (strategic complements), trust and interconnectedness among colleagues …

Direct Evidence For Geophyte Exploitation In The Wyoming Basin, Kaley Joyce, Lisbeth A. Louderback, Erick Robinson

Anthropology Faculty Publications and Presentations

In the Wyoming Basin, archaeological sites dating from the Early Archaic to Late Prehistoric are often found associated with or adjacent to dense populations of Cymopterus bulbosus (springparsley), a nutritious geophyte that would have been an important food source for prehistoric humans living in the region. Experimental data have shown that the caloric return rates of C. bulbosus were enough to support seasonal exploitation by foragers, yet there has been no direct evidence for the use of this geophyte from the archaeological record. In this study, we examine starch granules from 10 ground stone tools excavated from two stratified, multicomponent …

P3k14c, A Synthetic Global Database Of Archaeological Radiocarbon Dates, Erick Robinson

Anthropology Faculty Publications and Presentations

Archaeologists increasingly use large radiocarbon databases to model prehistoric human demography (also termed paleo-demography). Numerous independent projects, funded over the past decade, have assembled such databases from multiple regions of the world. These data provide unprecedented potential for comparative research on human population ecology and the evolution of social-ecological systems across the Earth. However, these databases have been developed using different sample selection criteria, which has resulted in interoperability issues for global-scale, comparative paleo-demographic research and integration with paleoclimate and paleoenvironmental data. We present a synthetic, global-scale archaeological radiocarbon database composed of 180,070 radiocarbon dates that have been cleaned according …

Dogs Produce Distinctive Play Pants: Confirming Simonet Et Al. (2001), Shelly Volsche, Hannah Gunnip, Cameron Brown, Makayla Kiperash, Holly Root-Gutteridge, Alexandra Horowitz

Anthropology Faculty Publications and Presentations

Identifying meaningful vocalizations in nonhuman animals can help explain the evolution of human communications. However, non-speech-like sounds, including laughter equivalents, are not well studied, although they may be meaningful. In this pilot study we investigate whether dogs perform a domain-specific pant during play by capturing vocalizations and behaviors during three interactions: training, play, and rest. Sixteen human and dog dyads participated in a session that included all three interactions in the same order: training, play, rest. During these sessions, each partner wore wireless microphones that transmitted to a receiver and digital recorder, while a standalone digital camera captured video of …

The Difference Is In The Details: Attachment And Cross-Species Parenting In The United States And India, Shelly Volsche, Rijita Mukherjee, Madhavi Rangaswamy

Anthropology Faculty Publications and Presentations

The purpose of the current research was to explore changes in Indian attitudes and practices with pet dogs and cats and compare them with responses from the United States. Pet parenting, defined as the investment of money, emotion, and time in companion animals, is a form of alloparental care (care given by someone other than the offspring’s biological parents). Pet parenting appears to emerge in cultures that (1) demonstrate high rates of urbanization, (2) have declining total fertility rates (average births per woman), and (3) support life orientations beyond reproduction (collectively called the second demographic transition). A total of 1,417 …

New Research Suggests Cat And Dog ‘Moms’ And ‘Dads’ Really Are Parenting Their Pets: Here’S The Evolutionary Explanation Why, Shelly Volsche

Anthropology Faculty Publications and Presentations

Have you noticed more cats riding in strollers lately? Or bumper stickers that read, “I love my granddogs”? You’re not imagining it. More people are investing serious time, money and attention in their pets.

It looks an awful lot like parenting, but of pets, not people.

Can this kind of caregiving toward animals really be considered parenting? Or is something else going on here?

Behavioral Ecology Of The Family: Harnessing Theory To Better Understand Variation In Human Families, Paula Sheppard, Kristin Snopkowski

Anthropology Faculty Publications and Presentations

Researchers across the social sciences have long been interested in families. How people make decisions such as who to marry, when to have a baby, how big or small a family to have, or whether to stay with a partner or stray are questions that continue to interest economists, sociologists, demographers, and anthropologists. Human families vary across the globe; different cultures have different marriage practices, different ideas about who raises children, and even different notions of what a family is. Human behavioral ecology is a branch of anthropology that is particularly interested in cultural variation of family systems and how …

Pet Parenting In The United States: Investigating An Evolutionary Puzzle, Shelly Volsche

Anthropology Faculty Publications and Presentations

Fertility rates continue to decline globally amidst the second demographic transition, marked by urbanization, increased educational attainment, and most importantly, a new flexibility in life-course organization. As a result, some individuals are choosing to bring companion animals in the home rather than raising children. Purpose The purpose of this study is to explore whether these transitions result in differential companion animal attachment and caregiving behavior in the homes of parents (or those who desire to become parents) and nonparents or childfree “pet parents.” Methods A total of 917 respondents completed an online survey via Qualtrics that included demographic questions, the …

Fertility Intentions And Outcomes In Indonesia: Evolutionary Perspectives On Sexual Conflict, Kristin Snopkowski, James Joseph Nelson

Anthropology Faculty Publications and Presentations

Differential fertility preferences for men and women may provide insights into human sexual conflict. We explore whether pairbonded couples have different preferences for future offspring, which socioecological factors are associated with these preferences, and who achieves their desired fertility over time. We utilise the Indonesia Family Life Survey (IFLS), a longitudinal survey which collected data from 1993 to 2015, to compare desired future fertility for 9655 couples and follow couples who had divergent preferences. The majority of couples (64.8%) want the same number of future offspring. In 20.7% of couples, husbands want more future offspring than their wives, while the …

Americans Adopted Fewer Pets From Shelters In 2020 As The Supply Of Rescue Animals Fell, Shelly Volsche

Anthropology Faculty Publications and Presentations

Demand for new pets certainly seemed to spike when the COVID-19 pandemic reached the United States in early 2020 and forced many Americans to spend more time isolated.

But adoptions from animal shelters and rescues actually fell 17% to approximately 1.6 million in 2020 from over 1.9 million in 2019, according to Shelter Animal Counts, a nonprofit that tracks data regarding animals that spend time in shelters.

How did Americans end up welcoming fewer rescued animals into their homes during the COVID-19 pandemic? The short answer is that there weren’t enough furry friends to go around.

Decreased Cortisol Among Hikers Who Preferentially Visit And Value Biodiverse Riparian Zones, Ellie Opdahl, Kathryn Demps, Julie A. Heath

Anthropology Faculty Publications and Presentations

While outdoor recreationists often report increases to their well-being for time spent in nature, the mechanisms through which local ecologies affect human health have been difficult to quantify, and thus to manage. We combine data from pre-post salivary cortisol measures, GPS tracks, visitor photos, and surveys from 88 hikers traversing several types of landscape within peri-urban public lands in southwest Idaho, USA. We find that time in biodiverse riparian areas and areas of perceived aesthetic value correlates with decreases in salivary cortisol and improved well-being for hikers. Wildlife sightings were not associated with changes in salivary cortisol, but were associated …

The Revival Of Reindeer Herding In The North Baikal Highlands, Republic Of Buryatia, John P. Ziker

Anthropology Faculty Publications and Presentations

This paper summarizes work with two Evenki reindeer herding collectives in the Severo-Baikal’skoe nagor’e in July, 2010. Ethnographic work with reindeer herder groups Oron and Uluki, both established in the early 1990s in the Kholodnoe community, highlighted two variations on the traditional Evenki approach to reindeer herding evincing numerous commonalities. Both groups relied on natural and human-made features of the landscape to habituate reindeer to areas where reindeer herding had been abandoned for close to 20 years. Reindeer herders and reindeer mutually determine seasonal and daily mobility patterns, and reindeer herding activities are leveraged to conduct big-game hunting and furbearer …

Tempo And Mode Of Neolithic Crop Adoption By Palaeolithic Hunter-Gatherers Of Taiwan: Ethno-Archaeological And Behavioural Ecology Perspectives, Pei-Lin Yu

Anthropology Faculty Publications and Presentations

Archaeological evidence from the Early Taiwan Neolithic facilitates the development and assessment of predictive statements about habitat-related variance in the initial adoption of agriculture. This paper summarises archaeological research about Taiwan’s terminal Palaeolithic and early Neolithic periods, and derives working expectations from human behavioural ecology models of diet breadth, opportunity cost, and future discounting, as well as ethno-archaeological research. Expectations are evaluated using Lewis Binford’s hunter-gatherer database. Results allow for the prediction that selective forces during the Neolithic transition of Taiwan favoured mixed economies that varied according to the properties of the local habitat, the social and subsistence organisation of …

Owner Sex And Human–Canine Interactions At The Park, Shelly Volsche, Elizabeth Johnson, Bianca Reyes, Cecelia Rumsey, Kayla Murai, Deisy Landeros

Anthropology Faculty Publications and Presentations

The purpose of this exploratory study was to investigate if and what types of differences exist between men and women when interacting with their dogs in a “natural” setting. In the case of this study, we defined “natural” as visiting a public park with their dog. To do this, we completed a series of 10-minute focal follows (n = 177) on human–canine dyads at local leashed and off-leash dog parks from December 2018 to March 2019. Data collection included counting incidences of 14 specific interactions (i.e., “baby talks to dog” or “scolds/speaks harshly to dog”), observable demographics (sex of …

Innovative Teaching Knowledge Stays With Users, Brittnee Earl, Karl Mertens, Susan E. Shadle, John P. Ziker

Anthropology Faculty Publications and Presentations

Programs seeking to transform undergraduate science, technology, engineering, and mathematics courses often strive for participating faculty to share their knowledge of innovative teaching practices with other faculty in their home departments. Here, we provide interview, survey, and social network analyses revealing that faculty who use innovative teaching practices preferentially talk to each other, suggesting that greater steps are needed for information about innovative practices to reach faculty more broadly.

We Studied What Happens When Guys Add Their Cats To Their Dating App Profiles, Lori Kogan, Shelly Volsche

Anthropology Faculty Publications and Presentations

If you’ve used a dating app, you’ll know the importance of choosing good profile pics.

These photos don’t just relay attractiveness; a recent study suggested that 43% of people think they can get a sense of someone’s personality by their picture. You might guess that someone who has included a photo of themselves hiking is an outdoorsy type of person.

But as scientists who study human-animal interactions, we wanted to know what this meant for pet owners – in particular, male cat owners.

If you’re a guy who owns a cat, what kind of effect does it have on suitors …

Modeling Incipient Use Of Neolithic Cultigens By Taiwanese Foragers: Perspectives From Niche Variation Theory, The Prey Choice Model, And The Ideal Free Distribution, Pei-Lin Yu

Anthropology Faculty Publications and Presentations

The earliest evidence for agriculture in Taiwan dates to about 6000 years BP and indicates that farmer-gardeners from Southeast China migrated across the Taiwan Strait. However, little is known about the adaptive interactions between Taiwanese foragers and Neolithic Chinese farmers during the transition. This paper considers theoretical expectations from human behavioral ecology based models and macroecological patterning from Binford’s hunter-gatherer database to scope the range of responses of native populations to invasive dispersal. Niche variation theory and invasion theory predict that the foraging niche breadths will narrow for native populations and morphologically similar dispersing populations. The encounter contingent prey choice …

Life-History Factors Influence Teenagers’ Suicidal Ideation: A Model Selection Analysis Of The Canadian National Longitudinal Survey Of Children And Youth, John P. Ziker, Kristin Snopkowski

Anthropology Faculty Publications and Presentations

Suicidality is an important contributor to disease burden worldwide. We examine the developmental and environmental correlates of reported suicidal ideation at age 15 and develop a new evolutionary model of suicidality based on life history trade-offs and hypothesized accompanying modulations of cognition. Data were derived from the National Longitudinal Survey of Children and Youth (Statistics Canada) which collected information on children’s social, emotional, and behavioral development in eight cycles between 1994 and 2009. We take a model selection approach to understand thoughts of suicide at age 15 (N ≈ 1,700). The most highly ranked models include social support, early …

The Life History Of Human Foraging: Cross-Cultural And Individual Variation, John Ziker

Anthropology Faculty Publications and Presentations

Human adaptation depends on the integration of slow life history, complex production skills, and extensive sociality. Refining and testing models of the evolution of human life history and cultural learning benefit from increasingly accurate measurement of knowledge, skills, and rates of production with age. We pursue this goal by inferring hunters’ increases and declines of skill from approximately 23,000 hunting records generated by more than 1800 individuals at 40 locations. The data reveal an average age of peak productivity between 30 and 35 years of age, although high skill is maintained throughout much of adulthood. In addition, there is substantial …

How Taiwanese Death Rituals Have Adapted For Families Living In The Us, Pei-Lin Yu

Anthropology Faculty Publications and Presentations

Taiwanese people living in the United States face a dilemma when loved ones die. Many families worry that they might not be able to carry out proper rituals in their new homeland.

As a biracial Taiwanese-American archaeologist living in Idaho and studying in Taiwan, I am discovering the many faces of Taiwan’s blended cultural heritage drawn from the mix of peoples that have inhabited the island over millennia.

Not The Cat’S Meow?: The Impact Of Posing With Cats On Female Perceptions Of Male Dateability, Lori Kogan, Shelly Volsche

Anthropology Faculty Publications and Presentations

The aim of this study was to investigate whether men were considered more attractive when posing for a photo alone or holding a cat. Prior research suggests that women view pet owners as more attractive and dateable than non-pet owners; however, this effect was strongest with dog owners. We hypothesized that men posing with cats would be more attractive than those posing alone. Using an online survey, women viewed images of a man posing alone or with a cat and rated the men on the Bem Sex Role Inventory (BSRI) and the Big Five Inventory. Women viewed men as less …

Idaho First: How Archaeological Discoveries On The Lower Salmon River Change Our Perspectives On The Peopling Of The Americas (Slides), Loren Davis

The Idea of Nature Public Lecture Series

Who were the First Idahoans? Archaeological research at the Cooper’s Ferry site on the Lower Salmon River indicates that Western Stemmed Tradition people were living in the Columbia River basin between 16,560 and 15,280 years ago until about 13,000 years ago. This exciting discovery is strong evidence for the deep antiquity of human entry into North America during the late Ice Age: a time that horses and other charismatic megafauna roamed Idaho. The First Idahoans arrived before the opening of an ice-free corridor, which favors the hypothesis of boat-supported migration from the Bering Strait down the Pacific coast.

Sexual Initiation Among Canadian Youth: A Model Comparison Approach Of Evolutionary Hypotheses Shows Greatest Support For Extrinsic Mortality Cues, Intergenerational Conflict, And Early Life Psychosocial Stressors, Kristin Snopkowski, John P. Ziker

Anthropology Faculty Publications and Presentations

Early life factors are associated with the timing of reproductive events in adolescence, but a variety of hypotheses (such as psychosocial acceleration theory, paternal investment theory, extrinsic mortality, internal prediction, and intergenerational conflict) propose different explanations for why this may occur. To compare between these theories, we use the National Longitudinal Survey of Children and Youth, an extensive, longitudinal survey of Canadian male and female youth (aged 14-15 in last wave) to identify variables that uniquely support these different models (n≈1200). We identify the best predictors of sexual initiation for each hypothesis and then use a model selection procedure to …