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  1. Robert Boyd, Gerd Gigerenzer, Peter J. Richerson, Arthur Robson, Jeffrey R. Stevens & Peter Hammerstein, Individual Decision Making and the Evolutionary Roots of Institutions.
    Humans hunt and kill many different species of animals, but whales are our biggest prey. In the North Atlantic, a male long-fi nned pilot whale (Globiceph- ala melaena), a large relative of the dolphins, can grow as large as 6.5 meters and weigh as much as 2.5 tons. As whales go, these are not particularly large, but there are more than 750,000 pilot whales in the North Atlantic, traveling in groups, “pods,” that range from just a few individuals to a (...)
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  2. Jeffrey R. Stevens & Marc D. Hauser, Evolving the Psychological Mechanisms for Cooperation.
    ■ Abstract Cooperation is common across nonhuman animal taxa, from the hunting of large game in lions to the harvesting of building materials in ants. Theorists have proposed a number of models to explain the evolution of cooperative behavior. These ultimate explanations, however, rarely consider the proximate constraints on the implementation of cooperative behavior. Here we review several types of cooperation and propose a suite of cognitive abilities required for each type to evolve. We propose that several types of cooperation, (...)
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  3. Nelly Mühlhoff, Jeffrey R. Stevens & Simon Matthew Reader (2011). Spatial Discounting of Food and Social Rewards in Guppies (Poecilia Reticulata). Frontiers in Psychology 2.
    In temporal discounting, animals trade off the time to obtain a reward against the quality of a reward, choosing between a smaller reward available sooner versus a larger reward available later. Similar discounting can apply over space, when animals choose between smaller and closer versus larger and more distant rewards. Most studies of temporal and spatial discounting in nonhuman animals use food as the reward, and it is not established whether animals trade off other preferred stimuli in similar ways. Here, (...)
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  4. Jeffrey R. Stevens (2010). The Challenges of Understanding Animal Minds. Frontiers in Psychology 1.
    The Challenges of Understanding Animal Minds.
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  5. Jeffrey R. Stevens, Jenny Volstorf, Lael J. Schooler & Jörg Rieskamp (2010). Forgetting Constrains the Emergence of Cooperative Decision Strategies. Frontiers in Psychology 1:235-235.
    Theoretical studies of cooperative behavior have focused on decision strategies that depend on a partner's last choices. The findings from this work assume that players accurately remember past actions. The kind of memory that these strategies employ, however, does not reflect what we know about memory. Here, we show that human memory may not meet the requirements needed to use these strategies. When asked to recall the previous behavior of simulated partners in a cooperative memory task, participants performed poorly, making (...)
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  6. Nils Straubinger, Edward T. Cokely & Jeffrey R. Stevens (2009). The Dynamics of Development: Challenges for Bayesian Rationality. Behavioral and Brain Sciences 32 (1):103-104.
    Oaksford & Chater (O&C) focus on patterns of typical adult reasoning from a probabilistic perspective. We discuss implications of extending the probabilistic approach to lifespan development, considering the role of working memory, strategy use, and expertise. Explaining variations in human reasoning poses a challenge to Bayesian rational analysis, as it requires integrating knowledge about cognitive processes.
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  7. Adrien Barton, Shabnam Mousavi & Jeffrey R. Stevens (2007). A Statistical Taxonomy and Another “Chance” for Natural Frequencies. Behavioral and Brain Sciences 30 (3):255-256.
    The conclusions of Barbey & Sloman (B&S) crucially depend on evidence for different representations of statistical information. Unfortunately, a muddled distinction made among these representations calls into question the authors' conclusions. We clarify some notions of statistical representations which are often confused in the literature. These clarifications, combined with new empirical evidence, do not support a dual-process model of judgment.
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  8. Jeffrey R. Stevens & Fiery A. Cushman (2004). Cognitive Constraints on Reciprocity and Tolerated Scrounging. Behavioral and Brain Sciences 27 (4):569-570.
    Each of the food-sharing models that Gurven considers demands unique cognitive capacities. Reciprocal altruism, in particular, requires a suite of complex abilities not required by alternatives such as tolerated scrounging. Integrating cognitive constraints with comparative data from other species can illuminate the adaptive benefits of food sharing in humans.
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  9. Jeffrey R. Stevens & Marc D. Hauser (2004). Why Be Nice? Psychological Constraints on the Evolution of Cooperation. Trends in Cognitive Sciences 8 (2):60-65.
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