Pilfering Eurasian jays use visual and acoustic information to locate caches

Pilfering corvids use observational spatial memory to accurately locate caches that they have seen another individual make. Accordingly, many corvid cache-protection strategies limit the transfer of visual information to potential thieves. Eurasian jays (Garrulus glandarius) employ strategies that reduce the amount of visual and auditory information that is available to competitors. Here, we test whether or not the jays recall and use both visual and auditory information when pilfering other birds’ caches. When jays had no visual or acoustic information about cache locations, the proportion of available caches that they found did not differ from the proportion expected if jays were searching at random. By contrast, after observing and listening to a conspecific caching in gravel or sand, jays located a greater proportion of caches, searched more frequently in the correct substrate type and searched in fewer empty locations to find the first cache than expected. After only listening to caching in gravel and sand, jays also found a larger proportion of caches and searched in the substrate type where they had heard caching take place more frequently than expected. These experiments demonstrate that Eurasian jays possess observational spatial memory and indicate that pilfering jays may gain information about cache location merely by listening to caching. This is the first evidence that a corvid may use recalled acoustic information to locate and pilfer caches.     

Thinking about Others versus Another: Three Reasons Judgments about Collectives and Individuals Differ

In this article, we review evidence that people are more positive in assessments of specific individuals than they are about collectives of others, even when people have essentially no information about the individual or collective they are judging. We offer three explanations for this difference. First, evaluative “attacks” on individuals are more aversive than similar attacks on collectives. Second, to encourage or smooth interaction, people sometimes “assume the best” about individuals until proven wrong. Social interaction occurs between specific individuals, so such optimism does not extend to people in general. Third, in making judgments of individuals versus collectives, people naturally focus on different types of information. For an individual, people spontaneously consider influences that operate inside an individual (e.g., one's will, one's moral conscience). But for collectives, people instead contemplate influences that operate at a social level (e.g., social influence, social norms). We explore how these three proposals help predict when judgments of individuals and collectives do or do not differ.     

Self-Determination,Perception of Peer Pressure,and Drinking Among College Students1

Based on self-determination theory (Deci & Ryan, 1985b), the present research tested a model that incorporated motivational orientation, extrinsic reasons for drinking, and perceptions of peer pressure as predictors of drinking among college students. In a sample of undergraduates, support was found for a path model in which global motivation predicted extrinsic reasons for drinking, which predicted perceptions of peer pressure, which in turn predicted alcohol consumption. In addition, the relation between peer pressure and drinking was stronger for those who were oriented toward feeling controlled. Support was found for a similar model in a sample of fraternity students. Results support previous research on self-determination and health.     

Breast Cancer Risk Perceptions among Relatives of Women with Uninformative Negative <Emphasis Type="Italic">BRCA1/2</Emphasis> Test Results: The Moderating Effect of the Amount of Shared Information

The most common result of BRCA1/2 mutation testing when performed in a family without a previously identified mutation is an uninformative negative test result. Women in these families may have an increased risk for breast cancer because of mutations in non-BRCA breast cancer predisposition genes, including moderate- or low-risk genes, or shared environmental factors. Genetic counselors often encourage counselees to share information with family members, however it is unclear how much information counselees share and the impact that shared information may have on accuracy of risk perception in family members. We evaluated 85 sisters and daughters of women who received uninformative negative BRCA1/2 results. We measured accuracy of risk perception using a latent variable model where accuracy was represented as the correlation between perceived risk (indicators = verbal and quantitative measures) and calculated risk (indicators = Claus and BRCAPRO). Participants who reported more information was shared with them by their sister or mother about her genetic counseling session had greater accuracy of risk perception (0.707, p?=?0.000) than those who reported little information was shared (0.326, p?=?0.003). However, counselees shared very little information; nearly 20 % of family members reported their sister or mother shared nothing with them about her genetic counseling. Family members were generally not aware of the existence of a genetic counseling summary letter. Our findings underscore the need for effective strategies that facilitate counselees to share information about their genetic counseling sessions. Such communication may help their relatives better understand their cancer risks and enhance risk appropriate cancer prevention.     

Eleven angry men

While many of us would not want to abandon the requirement that a defendant can only be found guilty of a serious criminal offence by a unanimous jury, we should not expect epistemology to give us the resources we need for justifying this requirement. The doubts that might prevent jurors from reaching unanimity do not show that, say, the BARD standard has not been met. Even if it were true, as some have suggested, that rationality requires that a jury composed of epistemic peers should coalesce around one view about the defendant's guilt, the failure to reach unanimity might be a good reason to worry about the epistemic failings of some small number of jurors but no reason to worry that we've failed to protect the defendant from an unjustified imposition of, say, the risk against wrongful conviction. The arguments for the unanimity requirement will need to come from outside of epistemology.     

Mirror-mediated string-pulling task in Eurasian jays (Garrulus glandarius)

Animal Cognition - Mirror tasks can be used to investigate whether animals can instrumentally use a mirror to solve problems and can understand the correspondence between reflections and the real...     

Do men find "bony" women attractive?: Consequences of misperceiving opposite sex perceptions of attractive body image

Due to its role in the development and maintenance of eating disorders, body image perceptions and dissatisfaction continue to be an important area of study. Perceptions of attractive body images held by members of the opposite sex are an important determinant of body image satisfaction among both men and women. This research shows that men are accurate in their perceptions of what women find attractive among men, but women believe men want women to be thinner than men actually report. Furthermore, this inaccurate perception is associated with eating disorder symptomatology. The role of contingent self-worth was also assessed. Results indicate that individuals whose self-worth is more contingent on appearance-related standards experience more negative consequences than those who misperceive what the opposite sex finds attractive, but whose self-worth is less contingent on appearance. Implications for intervention are discussed.     

Self-Determination Theory and Motivational Interviewing: Complementary Models to Elicit Voluntary Engagement by Partner-Abusive Men

Research examining intimate partner violence (IPV) has lacked a comprehensive theoretical framework for understanding and treating behavior. The authors propose two complementary models, a treatment approach (Motivational Interviewing, MI) informed by a theory (Self-Determination Theory; SDT), as a way of integrating existing knowledge and suggesting new directions in intervening early with IPV perpetrators. MI is a client-centered clinical intervention intended to assist in strengthening motivation to change and has been widely implemented in the substance abuse literature. SDT is a theory that focuses on internal versus external motivation and considers elements that impact optimal functioning and psychological well-being. These elements include psychological needs, integration of behavioral regulations, and contextual influences on motivation. Each of these aspects of SDT is described in detail and in the context of IPV etiology and intervention using motivational interviewing.     

Directions of fit and the humean theory of motivation 1

According to the Humean theory of motivation, a person can only be motivated to act by a desire together with a relevantly related belief. More specifically, a person can only be motivated to ? by a desire to ψ together with a belief that ?-ing is a means to or a way of ψ-ing. In recent writings, Michael Smith gives what has become a very influential argument in favour of the Humean claim that desire is a necessary part of motivation, and a great deal has been written about Smith's defence of this Humean claim. However, no one has yet identified the fundamental weakness of his defence. The fundamental weakness is that there is no single conception of directions of fit that does all the work Smith needs it to do throughout the various stages of his defence.     

Examining the Relationship of Substance Use and Sexual Orientation

In this article we examine the effects of self-reported sexual orientation on substance abuse. Using data on a random sample of 6,713 individuals in Washington State, this study examines causes and correlates of substance use by sexual minorities, an at-risk and treatment underserved population. Logistic regression results indicate homosexual orientation is a significant positive predictor of past year marijuana use, past year hard drug use, past year binge drinking, and lifetime alcohol addiction. Bisexual orientation is a significant predictor of past year marijuana use, past year hard drug use, and past year binge drinking. Potential causal mechanisms for these elevated patterns of substance use are discussed.