Categorization of Prototypical Stimulus Classes by Pigeons

Previous findings have demonstrated the pigeon's ability to categorize sets of schematic faces defined by a polymorphous feature rule. We present here an experiment that was conducted to evaluate the influence of the category structure determined by the distribution of features across stimulus classes. The task was a middle-value discrimination, involving a band of positive stimuli surrounded by a band of negative stimuli. Two large sets of Brunswik faces were conceptualized as variations of a standard stimulus (prototype) and occupied highly overlapping regions in the feature space. The classes could be separated in terms of a distance-from-prototype rule. Only three of five animals were successful in classification training. Analyses of both the transfer performance and of the effects of feature values on the variance of responding revealed the classical prototype effect-that is, performance determined by the overall similarity to the central tendency of the classes. A theoretical evaluation of the data examines the possibility that pigeons discriminated between the classes by virtue of a prototype-distance rule, although exemplar models offer more parsimonious accounts.     

Ethical, Legal and Social Aspects of Brain-Implants Using Nano-Scale Materials and Techniques

Nanotechnology is an important platform technology which will add new features like improved biocompatibility, smaller size, and more sophisticated electronics to neuro-implants improving their therapeutic potential. Especially in view of possible advantages for patients, research and development of nanotechnologically improved neuro implants is a moral obligation. However, the development of brain implants by itself touches many ethical, social and legal issues, which also apply in a specific way to devices enabled or improved by nanotechnology. For researchers developing nanotechnology such issues are rather distant from their daily work in the lab, but as soon as they use their materials or devices in medical applications such as therapy of brain diseases they have to be aware of and deal with them. This paper is intended to raise sensitivity for the ethical, legal and social aspects (ELSA) involved in applying nanotechnology in brain implants or other devices by highlighting the short term problems of testing and clinical trials within the existing regulatory frameworks (A), the short and medium-term questions of risks in the application of the devices (B) and the long-term perspectives related to problems of enhancement (C). To identify and address such issues properly nanotechnologists should involve ethical, legal and social experts and regulatory bodies in their research as early as possible. This will help to remove pressure from regulatory bodies, to settle public concern and to prevent non-acceptable developments for the benefit of the patients.

Do corporations have minds of their own?

Corporations have often been taken to be the paradigm of an organization whose agency is autonomous from that of the successive waves of people who occupy the pattern of roles that define its structure, which licenses saying that the corporation has attitudes, interests, goals, and beliefs which are not those of the role occupants. In this essay, I sketch a deflationary account of agency-discourse about corporations. I identify institutional roles with a special type of status function, a status role, in which the collectively accepted function is expressed in part through its occupier’s intentional expression of her agency in that role (where the occupier is part of the group whose collective acceptance underwrites her having the relevant function in social transactions). I identify institutions as systems of status roles and show how this is compatible with seeing the agency of institutions generally, even over time periods in which there is complete change in role occupiers, as a matter of the contributions only of individual agents. I explain how the reduction of the institution to its members is compatible with its potentially having had a completely different membership. I show in the case of the corporation in particular that, once we see its origins and function, the surface features of legal discourse about corporate agency are misleading and are compatible with a deflationary account of corporate agency. I show in connection with this that the corporation is to be identified with its shareholders, and that where a corporation separates ownership and control, its managers and employees are proxy agents of the shareholders doing business under the corporate form. Finally, I canvass the legitimate ways of construing ordinary talk about corporate intention, belief, and so on, in light of this, none of which support the attribution of genuine agency or intentionality to any group per se associated with the corporation.     

Truth and meaning redux

In this paper, we defend Davidson's program in truth-theoretical semantics against recent criticisms by Scott Soames. We argue that Soames has misunderstood Davidson's project, that in consequence his criticisms miss the mark, that appeal to meanings as entities in the alternative approach that Soames favors does no work, and that the approach is no advance over truth-theoretic semantics.     

Explicit Persuasive Intent and Its Impact on Success at Persuasion—The Determining Roles of Attractiveness and Likeableness

The effect on the impact of a message of explicitly stating a desire to persuade can depend on the communicator's physical attractiveness. Experiment 1 confirmed this possibility. Attractive male and female salespersons induced more positive attitudes and stronger intentions to purchase a product when they explicitly stated their desire to influence potential buyers. In contrast, unattractive salespersons were less likely to induce a favorable attitude toward the product under these conditions. Experiment 2 replicated these effects and provided evidence that they are mediated by the attribution of self‐serving motives to the salesperson. A 2‐step process of impression formation and attribution was used to describe the mechanisms underlying these effects.     

Granting forgiveness or harboring grudges: implications for emotion, physiology, and health

Interpersonal offenses frequently mar relationships. Theorists have argued that the responses victims adopt toward their offenders have ramifications not only for their cognition, but also for their emotion, physiology, and health. This study examined the immediate emotional and physiological effects that occurred when participants (35 females, 36 males) rehearsed hurtful memories and nursed grudges (i.e., were unforgiving) compared with when they cultivated empathic perspective taking and imagined granting forgiveness (i.e., were forgiving) toward real-life offenders. Unforgiving thoughts prompted more aversive emotion, and significantly higher corrugator (brow) electromyogram (EMG), skin conductance, heart rate, and blood pressure changes from baseline. The EMG, skin conductance, and heart rate effects persisted after imagery into the recovery periods. Forgiving thoughts prompted greater perceived control and comparatively lower physiological stress responses. The results dovetail with the psychophysiology literature and suggest possible mechanisms through which chronic unforgiving responses may erode health whereas forgiving responses may enhance it.     

Reasoning by exclusion in the kea (<Emphasis Type="Italic">Nestor notabilis</Emphasis>)

Reasoning by exclusion, i.e. the ability to understand that if there are only two possibilities and if it is not A, it must be B, has been a topic of great interest in recent comparative cognition research. Many studies have investigated this ability, employing different methods, but rarely exploring concurrent decision processes underlying choice behaviour of non-human animals encountering inconsistent or incomplete information. Here, we employed a novel training and test method in order to perform an in-depth analysis of the underlying processes. Importantly, to discourage the explorative behaviour of the kea, a highly neophilic species, the training included a large amount of novel, unrewarded stimuli. The subsequent test consisted of 30 sessions with different sequences of four test trials. In these test trials, we confronted the kea with novel stimuli that were paired with either the rewarded or unrewarded training stimuli or with the novel stimuli of previous test trials. Once habituated to novelty, eight out of fourteen kea tested responded to novel stimuli by inferring their contingency via logical exclusion of the alternative. One individual inferred predominantly in this way, while other response strategies, such as one trial learning, stimulus preferences and avoiding the negative stimulus also guided the responses of the remaining individuals. Interestingly, the difficulty of the task had no influence on the test performance. We discuss the implications of these findings for the current hypotheses about the emergence of inferential reasoning in some avian species, considering causal links to brain size, feeding ecology and social complexity.     

Freud und die pränatale und perinatale Dimension des seelischen Erlebens

The tradition of psychoanalysis is burdened with fractures and splitting, the consequences of which have not yet, in my opinion, been adequately reflected. This concerns in particular the time-relatedness of some psychoanalytical concepts and the experiential importance of earliest experiences with the mother before and during birth. A fundamental reason for the incomplete apprehension of the reality of prenatal and perinatal experiences lies in the era-dependent and personally related limitations of Freud’s possibilities of insight, which were not adequately reflected in consideration of his great discoveries and from loyalty. The fractures mentioned were often compromise-like “solutions” relating to differing perceptions but also meant, more than had been realized, a loss of substantial insights. The consequence of this situation is that nowadays we have a variety of schools and groups with partial insights, which are, however, often arbitrarily generalized for the sake of group identity. This article is an attempt at a reflection of this situation and its background.     

Standardized Goals and Performance Feedback Aggregated Beyond the Work Unit: Optimizing the Use of Engineered Labor Standards and Electronic Performance Monitoring

Electronic performance monitoring can monitor employee performance, while providing proximal goals and immediate feedback. A warehouse management system was enhanced to depict goal and performance on handheld wireless computers to improve order selection in an auto-parts aftermarket distribution center. Upon the onset of the intervention of an engineered labor standard and electronic performance monitoring, performance immediately increased by 24 units picked per hour per person and was maintained for the duration of the study, an increase of 12.9%. Evidence from this study suggests that performance goals and feedback can be aggregated beyond the work-unit level without decreasing the effectiveness of the intervention.