We present empirical measures of wealth inequality and its intergenerational transmission among four horticulturalist populations. Wealth is construed broadly as embodied somatic and neural capital, including body size, fertility and cultural knowledge, material capital such as land and...

We investigated whether 20 emotional states, reported by 170 participants after participating in a Trust game, were experienced in a patterned way predicted by the “Recalibrational Model” or Valence Models. According to the Recalibrational Model, new information about trust-based interaction...

Though individuals differ in the degree to which they are predisposed to trust or act trustworthy, this paper theorizes that trust-based behaviors are universally determined by the calibration of conflicting short and long-sighted behavior regulation programs, and that these programs are...

While age-based discrimination is considered undesirable, we know little about the accuracy of age stereotypes and their effects on cooperation. To investigate the effects of age stereotypes on cooperation, we presented older adults (over age 50) and younger adults (under age 25) with...

Objectives We investigate whether age profiles of Tsimane forager-horticulturalists' reported skill development are consistent with predictions derived from life history theory about the timing of productivity and reproduction. Previous studies of forager skill development have often focused on...

This photo-essay shows and discusses snapshots of Tsimane older adults' contributions to the Tsimane Forager-Farmer Economy - especially via complimentary services such as caretaking, teaching, and chores

Within the context of auditor and issuer interaction, we examine the relationship between sexist stereotypes and sexual discrimination using laboratory experiments. Examining archival data, researchers have hypothesized gender differences in financial misstatement and auditing based on...

Objectives: To present an explanatory framework for depression in older adulthood in a small-scale society. We propose that depression is a consequence of functional disability, which can reduce subsistence productivity, and resource transfers within and across generations. Social conflict can...

Age-based discrimination is considered undesirable, yet we know little about age stereotypes and their effects on honesty and trust. To investigate this aspect of ageism, we presented older adults (over age 50) and younger adults (under age 25) with incentivized belief elicitation tasks about...

Human-robot and human-cyborg interactions requiring trust are increasingly common in the marketplace, workplace, on the road, and in the home, yet little is known about human willingness to make trust-based investments with non-human agents acting alone (i.e., “robots”), or bound to welfare...