Numbers, not value, motivate cooperation in humans and orangutans

Cooperation among competitors-whether sharing the burden of wind resistance in the Tour de France, forming price-fixing cartels in economic markets, or adhering to arms-control agreements in international treaties-seldom spreads in proportion to the potential benefits. To gain insight into the minds of uncooperative agents, economists and social psychologists have used the prisoner's dilemma task to examine factors leading to cooperation among competitors. Two types of factors have emerged in these studies: the relative rewards of defecting versus cooperating and breakdowns in trust, forgiveness and communication. The generalizability of economic and social psychological factors, however, relies on the assumption that agents' comparisons of gains and losses (whether for themselves, others, or both) preserves ratio information over arbitrary units, such as dollars and cents, and real rewards, such as food. This assumption is inconsistent with psychophysical studies on how the brain represents quantitative information, which suggests that mental magnitudes increase logarithmically with actual value. Thus, discrimination of two numerical magnitudes improves as the numerical distance between them increases and decreases as the magnitudes increase. Here we show an important consequence of this representational system for economic decision making: in the prisoner's dilemma game, purely nominal increases in the numerical magnitude of payoffs (such as, converting dollar values to cents or whole grapes into grape-parts) has a large effect on cooperative behaviour. Moreover, a logarithmic scaling of the ratio of rewards for cooperation versus defection predicted 97% of variability in observed cooperation, whereas the objective ratio predicted 0% of variability. By linking the brain's system of representing the magnitude of rewards to motivations for cooperative behaviour, these findings suggest that the nature of numerical representations may also account for the subjective value function described by Bernoulli, in which the apparent value of monetary incentives increases logarithmically with actual value

Anthropocentrism as cognitive dissonance in animal research?

Harmon-Jones et al. (2017) make a thought-provoking suggestion in their commentary on Zentall (2016): Overlooked biases among researchers on animal cognition might lead them to discount the traces of higher-order cognition in animals they study. We find the suggestion both philosophically important and worth further reflection for animal scientists. Harmon-Jones et al. point to two “cognitive dissonance” biases involving the clash between the common human resistance to viewing ourselves as animals/meat-eaters and how these biases might lead to discounting possible advanced cognitive performances in the animals studied. We show how these biases might appear in cognitive research generally and argue for further study on their effects

Come On Down: Investigating an Informational Strategy to Debias the Anchoring Heuristic

When individuals estimate the price of goods or services, irrelevant factors may affect the estimates. For example, irrelevant numbers in individuals’ environments can cause participants to “anchor” to them as starting point price estimates, such that estimates tend toward the anchor (Tversky & Kahneman, 1974; Chapman & Johnson, 1994). In fact, anchored individuals may pay up to three times as much for a product and buy 32% more products (Ariely, Loewenstein, & Prelec, 2003; Wansink, Kent, & Hoch, 1998). Because anchoring affects purchases large and small, this study investigates how to debias, or reduce the negative effects of, the anchoring heuristic. Debiasing strategies are not easily implemented outside the lab where anchoring has the largest real world effects (Strack & Mussweiler, 1997; Chapman & Johnson, 1994; George, Duffy, & Ahuja, 2000). We therefore investigated an easily implemented informational debiasing strategy offering little disruption to an individual’s daily routine. The debiasing had no effect on anchoring, but further investigation with a larger sample size and higher external validity is necessary before discounting the strategy completely

Self Control In Dogs

Poster presentation abstract

Moral Reasoning in Dogs

A sense of morality, values predisposing right (fair, just, kind) from wrong (unfair, cruel, dishonest) appears universally across all humankind (Kinnier, Kernes & Dautheribes, 2000). But where does morality come from? Is it uniquely human or do we share some moral values with nonhuman animals? To explore these questions domestic dogs—nonhumans with exceptional social cognitive skills—were tested for moral values through a replication of a study on moral reasoning in human infants (Hamlin & Wynn, 2011). Dogs watched a puppet show with a moral (helpful) and immoral (hinderer) actor. Dogs looked longer when the neutral puppet chose to associate with the moral helper than the immoral hinderer, demonstrating that dogs, like human infants, prefer agents associate with moral helpers. This preliminary study suggests morality may be an evolved trait shared by humans and nonhumans alike

Differences in Spatial Cognition in Captive Tiger and Bears

Poster presentation abstract

The Domestic Dogs’ (\u3cem\u3eCanis Familiaris\u3c/em\u3e) Understanding of Intentional and Goal Oriented Action

Domestic dogs possess unique sensitivity to human social cues, perhaps due to our shared evolutionary history. We explored whether dogs share social cognitive abilities - understanding intentions and goals - humans demonstrate from infancy. In Study 1, dogs watched a researcher either unable (i.e. she dropped a treat) or unwilling (i.e. she offered and then withdrew a treat) to provide food. Dogs demonstrated sensitivity to intentions by spending more time close to the researcher during unable than unwilling trials. In Study 2, dogs watched a researcher reach for a ball and ignore a duck. Next, the ball and the duck switched locations. Dogs looked longer when the researcher reached for the duck, violating the goal, suggesting they encoded the goal, not simply motor patterns. Combined these results suggest that sophisticated social cognitive abilities may have evolved in dogs due to our shared evolutionary history

Do Dogs Possess Self-Control?

Each year 6 to 8 million pet dogs enter shelters, and approximately 60% are euthanized. Unfortunately, many dogs are taken to shelters or euthanized due to behavioral problems. Identifying dogs who may have these behaviors allows owners to be informed and prepared for these dogs, reducing the number returned to shelters. One way to identify potential problems may be through measuring self-control in dogs. We have adapted our methods from a similar method used with capuchin monkeys (Bramlett et al., 2012). We constructed a wheel with food that rotated in front of dog subjects. The dog had the choice to eat less-preferred kibble or wait an additional few seconds for a preferred jerky treat. Dogs wait for food, and demonstrate variation in how long they wait. Future studies will explore how long dogs can wait and if variation in self-control predicts behavioral problems

Good Dog! Applications of Dog Science

Each year 6 to 8 million pet dogs enter shelters, and unfortunately, many are returned to shelters, or euthanized, due to behavioral problems. Many behavioral problems can be alleviated if dogs get exercise; however, some owners cannot provide dogs sufficient exercise. Further, some dogs may be physically unable to exercise. One possible solution is to provide dogs with mental exercise. We are currently developing a series of touchscreen computer tasks with the hope that they provide mental stimulation and can be made available to owners via a tablet application. As of now, a few dogs in our lab have learned to effectively use the touch screen. In the near future, we hope such touch screen tasks will transfer over into an application that will serve as an effective program to minimize the amount of behavioral problems, and hence, the number of dogs sent to, returned to, and euthanized in shelters