The influence of response-effect compatibility in a serial reaction time task

Participants performed a serial reaction time task, responding to either asterisks presented at varying screen locations or centrally presented letters. Stimulus presentation followed a fixed second-order conditional sequence. Each keypress in the experimental groups produced a contingent, key-specific tone effect. The critical variation concerned the mapping of tones to keys. In Experiment 1, keypresses in one control condition produced noncontingent tone effects, while in another control condition there were no tone effects. In Experiment 2, three different key-tone mappings were compared to a control condition without tone effects. The results show that tone effects improve serial learning when they are mapped to the response keys contingently and in a highly compatible manner. The results are discussed with reference to an ideomotor mechanism of motor sequence acquisition.     

IN DEFENCE OF METAPHYSICAL ANALYTICITY

According to the so‐called metaphysical conception of analyticity, analytic truths are true in virtue of meaning (or content) alone and independently of (extralinguistic) facts. Quine and Boghossian have tried to present a conclusive argument against the metaphysical conception of analyticity. In effect, they tried to show that the metaphysical conception inevitably leads into a highly implausible view about the truthmakers of analytic truths. We would like to show that their argument fails, since it relies on an ambiguity of the notion of ‘independence of (extralinguistic) facts’. If one distinguishes between variation independence and existence independence, the unwelcome view about the truthmakers of analytic truths no longer follows. Thus, there is at best a challenge, but no conclusive argument. The door to the metaphysical conception of analyticity is still open. 1     

Cultural diversity in nanotechnology ethics

Along with the rapid worldwide advance of nanotechnology, debates on associated ethical issues have spread from local to international levels. However unlike science and engineering issues, international perceptions of ethical issues are very diverse. This paper provides an analysis of how sociocultural factors such as language, cultural heritage, economics and politics can affect how people perceive ethical issues of nanotechnology. By attempting to clarify the significance of sociocultural issues in ethical considerations my aim is to support the ongoing international dialogue on nanotechnology. At the same time I pose the general question of ethical relativism in engineering ethics, that is to say whether or not different ethical views are irreconcilable on a fundamental level.     

Elements of trust: Risk and perspective-taking

Trust is essential to personal well-being and economic success, but it cannot occur without accepting the possibility of betrayal. In the experimental trust game, game-theoretic rationality prescribes that trust decisions should depend on the potential risk (egocentric costs and benefits) and the probability of reciprocity (derived from the trustee's temptation to defect). The current work tests the relative weights of these elements. Experiment 1 shows that trust increases when costs decrease and benefits increase. The latter finding is critical because increasing the trustor's benefit also means increasing the trustee's temptation to defect. Hence, this finding suggests that egocentrism prevails over perspective-taking. Experiment 2 shows that the trustee's temptation to defect (negatively) affects trust, but only when the trustor's cost and benefit are favorable. Results are interpreted as reflecting a boundedly rational decision process.     

Social perception as induction and inference: an integrative model of intergroup differentiation, ingroup favoritism, and differential accuracy

Three general properties of social stereotypes are the perception of differences between ingroups and outgroups (intergroup differentiation), the perception of ingroups as having more desirable attributes than outgroups (ingroup favoritism), and the greater accuracy of ingroup perceptions (differential accuracy). We present and test an inductive-reasoning model that accounts for all 3 phenomena, and we explicate the relations among them. Based on empirical evidence, the model assumes that most people have a positive self-image, that they project these self-images more strongly to ingroups than to outgroups, and that their self-images are valid cues for judgments about social groups. Two minimal-group experiments using a crossed-categorization paradigm support the model and provide new evidence for underlying psychological processes.     

Perspective taking as a means to overcome motivational barriers in negotiations: when putting oneself into the opponent's shoes helps to walk toward agreements

Previous negotiation research predominantly focused on psychological factors that lead to suboptimal compromises as opposed to integrative agreements. Few studies systematically analyzed factors that impact the emergence of hurtful partial impasses (i.e., nonagreements on part of the issues). The present research investigates negotiators' egoistic motivation as a determinant for the emergence of partial impasses. In addition, the authors seek to demonstrate that perspective taking serves as a powerful tool to avoid impasses and to overcome egoistic impediments. Specifically, it was predicted that within an integrative context perspective-takers succeed to exchange concessions on low- versus high-preference issues (i.e., logroll), thereby increasing their individual profits without inflicting hurtful losses upon their counterparts. Three studies were conducted to test these predictions. Study 1 reveals that whereas negotiators' egoistic motivation increases the risk of partial impasses, perspective taking alleviates this risk. Study 2 demonstrates that this beneficial effect of a perspective-taking mindset is limited to integrative negotiations and does not emerge in a distributive context, in which negotiators are constrained to achieve selfish goals by inflicting hurtful losses on their counterparts. Study 3 confirms the assumption that in an integrative context egoistic perspective-takers overcome the risk of impasses by means of logrolling. The findings of the present studies are discussed with respect to their contribution to research on negotiations, social motivation, and perspective taking.