“We will work for you” – Social influence may suppress individual food preferences in a communicative situation in dogs

The level of motivation (i.e. incentive power) is thought to be one of the most important factors affecting performance and learning in various tasks. We investigated whether reward quality has an effect on the performance of family dogs in a two-way object choice test in which they can find the hidden food by relying on distal momentary human pointing cues. In three experiments we varied (1) the type of food reward according to the subjects’ own preference; (2) the quality of the reward offered at the same time in the indicated and not-indicated locations; and (3) the order of the high or low quality rewards in consecutive sessions. In Experiment 1, we first tested whether dogs prefer one kind of reward over another. Then one group was tested with the ‘preferred’ food as reward in the indicated bowl, while dogs in the other group received the ‘non-preferred’ food as reward. We did not find any difference between the performance and choice latencies of the two groups. In Experiment 2 for the first group, the indicated bowl contained a piece of carrot and the not-indicated bowl was empty. In the second group the indicated bowl contained carrot, but the not-indicated bowl contained sausage. According to a preliminary preference test, most dogs prefer sausage over carrot invariably. After 20 trials, the two groups performed surprisingly similarly. There was no difference found between groups in the number of correct choices, incorrect choices and non-choices. However, the comparison between the first and last five trials revealed that subjects who found sausage when they chose the not-indicated bowl (did not follow the pointing) chose the non-indicated bowl significantly more often toward the end of their test session. In Experiment 3, each dog received two sessions with 12 pointing trials in each. For the first session, one group was rewarded with sausage and the other with carrot upon choosing the indicated bowl. In the second session, the indicated bowl contained dry dog food for both groups. We found that correct choices and response latencies did not change over two sessions in the ‘sausage’ group. In the ‘carrot’ group, the dogs chose faster in the second session, but their performance did not improve; in fact, they chose the not-indicated bowl more often than the indicated bowl. As a conclusion, we can say that reward quality had some effect on dogs’ choice behavior in these experiments. The drop in their performance was not drastic, taking into account the general refusal to eat one of the ‘rewards’ (carrot) during the preference tests and also during the test trials. It seems that incentive contrast may play a relatively minor role in dog-human social interactions. Appropriate reward quality can be very important in asocial problem solving tasks, but, when interacting with humans, following human signals may override the effect of changed incentive power.     

Psychoanalysis and Human Values

Psychoanalysis can contribute quite a lot to the question of values and to a theory of ethics. While the first part of this presentation is focused on the impact psychoanalysis continues to exert on present day ethical theory, the second part discusses Erich Fromm's particular approach to psychoanalysis. Fromm was the first to reformulate in his psychoanalytic approach the idea of an ethic of the virtues. With his theory of character (and of social character) he made values an integral part of psychoanalytic theory. Hence, what matters most morally from a psychoanalytic stance is the quality of character orientation. Despite the fact that - in Fromm's own socio-psychoanalytic approach - man's character is the product of adaptation to the environment, morality for him is dictated by economic and social requirements - whatever common sense may tell us to the contrary. For Fromm there is an intrinsic primary tendency to growth in all human beings. Thus, morally good is whatever furthers the growth of our own powers by which we relate to the outside world and to ourselves in a loving, "sane" and creative way. The last section reflects some implications of Fromm's approach to understanding values as an integral part of psychoanalytic theory, and finally discusses whether the search for truth and human values is as obsolete as postmodern thinking claims.     

Reaction time measures in deception research: Comparing the effects of irrelevant and relevant stimulus–response compatibility

Evidence regarding the validity of reaction time (RT) measures in deception research is mixed. One possible reason for this inconsistency is that structurally different RT paradigms have been used. The aim of this study was to experimentally investigate whether structural differences between RT tasks are related to how effective those tasks are for capturing deception. We achieved this aim by comparing the effectiveness of relevant and irrelevant stimulus–response compatibility (SRC) tasks. We also investigated whether an intended but not yet completed mock crime could be assessed with both tasks. Results showed (1) a larger compatibility effect in the relevant SRC task compared to the irrelevant SRC task, (2) for both the completed and the intended crime. These results were replicated in a second experiment in which a semantic feature (instead of color) was used as critical response feature in the irrelevant SRC task. The findings support the idea that a structural analysis of deception tasks helps to identify RT measures that produce robust group effects, and that strong compatibility effects for both enacted crimes as well as merely intended crimes can be found with RT measures that are based on the manipulation of relevant SRC.     

An appreciative response to Niels Henrik Gregersen's JKR research conference lecture

Abstract

Using human embryos in research remains a controversial issue, especially in Christian bioethics. Although the official Catholic stance rejects human embryonic stem cell research, Christian thinkers T. Peters, K. Lebacqz and G. Bennett support it. They endorse the 14-day Rule and argue that ex vivo embryos lack moral worth. I examine and challenge the 14-day Rule and location argument (in vivo/ex vivo). I develop a theory of holistic anthropology and intrinsic moral value for human embryos. I conclude that intrinsic moral value is not equal to full moral value, and therefore use of embryos in biomedical research is morally permissible.     

The Role of Experience in the Assessment of Human Nature

Abstract

We need to distinguish between different types of experience and different experiential realms when we address the topic of human nature. Special emphasis is put on the hermeneutical dimension of human knowledge. The different experiential realms, which may give rise to natural, cultural and social, psychological and spiritual experiences, are then in turn assessed with regard to in what respect, for what purpose, and to what extent they can be used in order to establish a comprehensive and interdisciplinary justified view of human nature that takes all dimensions of human experience sufficiently into account.     

Divine Action,Resurrection, and the Transformation of the Universe

Abstract

The article examines the notion of self-organization and explores the reality of biological processes from an epistemological point of view. First, I briefly analyze what is currently regarded as one of the most important discoveries not only in physics, but also in biology—namely, complex systems and deterministic chaos; secondly, I offer some reflections on the new frontiers of contemporary biology— namely, functional genomics and systems biology. The central part of the article focuses on the epistemological transition from genetic determinism to the new conception of “meaning” as emergence.     

Debating the Theological Implications of New Technologies

In a recent report on focus group discussions of GMOs in Britain, Celia Deane Drummond et al. observed that public anxieties about emerging biotechnologies often reflect concerns that are ultimately theological in nature. Such concerns (whether in relation to biotechnology or other areas of technological development) may be easily dismissed as peripheral or irrelevant to the core secular issues of health, safety, environmental impacts, the politics of commercialization and research integrity. However, I shall argue that theological questions are actually integral to the ongoing development of technology and that there is a need for a public discourse that enables such questions to be articulated and debated.     

Evidence for an expectancy-based theory of avoidance behaviour

In most studies on avoidance learning, participants receive an aversive unconditioned stimulus after a warning signal is presented, unless the participant performs a particular response. Lovibond (2006) recently proposed a cognitive theory of avoidance learning, according to which avoidance behaviour is a function of both Pavlovian and instrumental conditioning. In line with this theory, we found that avoidance behaviour was based on an integration of acquired knowledge about, on the one hand, the relation between stimuli and, on the other hand, the relation between behaviour and stimuli.     

A positive patterning advantage with complex but not simple patterning: A cue constellation approach

Determinants of a positive patterning advantage (that is, an advantage for positive patterning over negative patterning) in human causal reasoning were examined in an experiment that compared simple patterning discriminations (A, B vs. AB) to complex patterning discriminations (AB, BC, AC vs. ABC). As predicted by a cue constellation analysis of complex discriminations, a positive patterning advantage was found with complex patterning but not with simple patterning discriminations. This result may explain why some recent studies have found a positive patterning advantage where earlier studies had failed to find one. The interaction of patterning complexity with the positive patterning advantage appears to pose problems for rule-based accounts of patterning. The results support the view that associative theories of human causal reasoning are more easily distinguished from rule-based approaches when applied to conditions that make simple rules difficult to identify or implement.     

International Human Rights and National Discretion

This paper argues that the EuropeanCourt of Human Rights couldserve as a model for an international court ofhuman rights to be builtupon the United Nations Committee on HumanRights. It argues that theconcerns states might have over the surrenderof a significant portion oftheir national sovereignity might be lessenedif such an internationalcourt were to incorporate the margin ofappreciation doctrine employed bythe European Court of Human Rights. Thisdoctrine is intended to respectthe customs and traditions of sovereign statesin dealing with humanrights issues, while maintaining that somerights such as the right not tobe tortured will be considered as basic andwill stand independently ofthe customs and traditions of sovereignstates.