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411.
In human social interactions, punishment is often directed at cheating individuals. Subjective reports and neuro-imaging studies indicate that the experience of interacting with a cheat produces negative emotions and that the act of punishing a cheat assuages these feelings. However, while negative emotions may elicit punishment, the precise source of these emotions remains obscure. Specifically, it is often very difficult to tease apart whether punishing individuals are inequity averse (upset because cheating partner receives more than they should) or, more simply, whether they might be loss averse (upset because their payoffs did not meet their expectations). We compare results on punishment and inequity aversion in humans with results from a non-human model system, the cleaning mutualism between bluestreak cleaner wrasse (Labroides dimidiatus) and its reef-fish ??clients??. Male cleaner fish are known to punish females that cheat during joint client inspections, but a recent study failed to demonstrate evidence for inequity aversion in this species. We suggest that punishment in cleaner fish may be motivated by loss aversion rather than inequity aversion. Punishment in humans might also often be motivated by loss aversion??and empirical studies that disentangle the two competing motives for punishment are a clear research priority. 相似文献
412.
This article presents the results of a pilot study on the effects of vulture modification to human remains. A donated body from the Willed Body Donation Program was placed at the Forensic Anthropology Research Facility (FARF), an outdoor human decomposition laboratory located at Texas State University-San Marcos. The effects of vulture scavenging on the timing and sequence, and the rate of skeletonization, disarticulation, and dispersal were observed via a motion sensing camera and direct observation. Using GIS (Geographic Information Systems) and GPS (Global Positioning System) technologies and spatial analytical methods, the transport of skeletal elements was mapped in order to analyze dispersal and terrain-influenced patterns of active vulture scavenging. Results showed that the initial scavenging took place 37 days after placement at FARF. This delay in scavenging differs from previous research. After the initial appearance of the vultures, the body was reduced from a fully-fleshed individual to a skeleton within only 5h. This underscores the potential for errors in postmortem interval estimations made at vulture scavenged scenes. Additionally, spatial analysis showed that skeletal elements were dispersed by vultures to lower elevations, and that the disarticulation and dispersal of the skeletal elements occurs early in the scavenging sequence. 相似文献
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Schoeneman-Morris KA Scalora MJ Chang GH Zimmerman WJ Garner Y 《Journal of forensic sciences》2007,52(5):1142-1147
To better understand inappropriate correspondence sent to public officials, 301 letter cases and 99 email cases were randomly selected from the United States Capitol Police investigative case files and compared. Results indicate that letter writers were significantly more likely than emailers to exhibit indicators of serious mental illness (SMI), engage in target dispersion, use multiple methods of contact, and make a problematic approach toward their target. Emailers were significantly more likely than letter writers to focus on government concerns, use obscene language, and display disorganization in their writing. Also, letter writers tended to be significantly older, have more criminal history, and write longer communications. A multivariate model found that disorganization, SMI symptoms, problematic physical approach, and target dispersion significantly differentiated between the correspondence groups. The group differences illuminated by this study reveal that letter writers are engaging in behavior that is higher risk for problematic approach than are emailers. 相似文献
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Using a simulated instrument strategy, we analyze how expansions to the federal and state Earned Income Tax Credits (EITC) affected household finances over the past two decades. Using data from the Survey of Income and Program Participation wealth topical modules, we also test whether responses differ over time, as well as whether there are different responses to the federal and state expansions, and how responses vary by educational attainment. A $1,000 policy‐induced increase in the average household EITC leads to a 3 percentage point increase in the likelihood of holding money in a savings or checking account, and approximately $700 more held in savings balances. These results are coupled with large increases in pre‐tax family earnings. We also find some evidence of decreases in unsecured debt holdings. We interpret these results as further evidence that the EITC increases the financial stability of low‐income single mothers. 相似文献
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