Self-medication behaviour is the use of natural materials or chemical substances to manipulate behaviour or alter the body’s response to parasites or pathogens. Self-medication can be preventive, performed before an individual becomes infected or diseased, and/or therapeutic, performed after an individual becomes infected or diseased. We summarized all available reports of self-medication in mammals and reconstructed its evolution. We found that reports of self-medication were restricted to eutherian mammals and evolved at least four times independently. Self-medication was most commonly reported (...) in primates. Detailed analyses of primates suggest that self-medication is a life-history trait associated with body size, absolute brain size and longevity, but we found no support for the hypothesis that self-medication evolved to reduce the costs of social living. Large, longer-lived species might thus benefit uniquely from self-medication. (shrink)

This chapter focuses on the archetypal image of the necromancer: the black‐robed creator and master of the undead. The necromancer is often depicted as a mere cackling villain, using her power over death to forward her evil agenda. In this way, necromancy has been philosophically maligned. Although necromancers were traditionally considered to be evil in Dungeons Dragons (DD), the game came to accommodate the idea that necromancers, in theory, could be neutral, or even good‐aligned, with their powers used for the (...) greater good. The distaste for necromancy and its mindless minions is instead a relic of “pre‐theoretical intuition” a common‐sense belief that may not hold up to philosophical scrutiny. Films and TV series depict the walking dead as ravenous, brain‐eating monstrosities. Next to such depictions, the relatively harmless nature of Dungeons Dragons’ mindless undead is easy to overlook. (shrink)

There are wide individual differences in the ability to detect a stimulus contingency embedded in a complex paradigm. The present study used a cognitive masking paradigm to better understand individual differences related to contingency learning. Participants were assessed on measures of electrodermal arousal and on working memory capacity before engaging in the contingency learning task. Contingency awareness was assessed both by trial-by-trial verbal reports obtained during the task and by a short post-task recognition questionnaire. Participants who became aware had fewer (...) non-specific skin conductance responses and tended to score higher on a digit span assessment. Skin conductance level was not significantly lower in the aware group than in the unaware group. These findings are consistent with studies showing that lower arousal and greater cognitive processing capacity facilitate conscious perception of a greater breadth of information within a scene or a task. (shrink)