Rethinking neuroethics in the light of the extended mind thesis

The extended mind thesis is the claim that mental states extend beyond the skulls of the agents whose states they are. This seemingly obscure and bizarre claim has far-reaching implications for neuroethics, I argue. In the first half of this article, I sketch the extended mind thesis and defend it against criticisms. In the second half, I turn to its neuroethical implications. I argue that the extended mind thesis entails the falsity of the claim that interventions into the brain are especially problematic just because they are internal interventions, but that many objections to such interventions rely, at least in part, on this claim. Further, I argue that the thesis alters the focus of neuroethics, away from the question of whether we ought to allow interventions into the mind, and toward the question of which interventions we ought to allow and under what conditions. The extended mind thesis dramatically expands the scope of neuroethics: because interventions into the environment of agents can count as interventions into their minds, decisions concerning such interventions become questions for neuroethics.     

The role of the ‘other’ in national identity: exploring the context‐dependence of the national ingroup stereotype

Analysts from a range of disciplines (especially sociology and social anthropology) highlight the role of the ‘other’ in the construction and definition of national identity. Recently some social psychologists have come to emphasize the inherently relational nature of identity. Drawing upon these recent investigations, the present paper reports a field study investigating the context‐dependent nature of group identity. Using a modified version of the Katz–Braly task, British subjects (n=240) stereotyped two national groups: Americans and British. They did so in two conditions. In the ‘one‐group’ conditions, subjects rated either of the two groups. In the ‘two‐group’ conditions, they rated one whilst also considering the other. Following Oakes, Haslam and Turner (1994) we predicted that whereas subjects' stereotypes of the national outgroup (the Americans) would be unaffected by this manipulation, their stereotype of the national ingroup (the British) would be affected. This prediction was confirmed. We also predicted that the national ingroup stereotype obtained in the ‘two‐group’ condition would be one which was defined in contrast to the American ‘other’ which constituted the comparative context. Using a measure which takes into account the applicability of ingroup‐defining terms to both the ingroup and the outgroup (the diagnosticity measure of stereotyping proposed by McCauley and Stitt, 1978) we show that the ingroup identity definition produced in this condition did indeed differentiate the British from the Americans. The significance of these data for those concerned with the application of social psychological theory to real‐life social problems is discussed. Copyright © 1999 John Wiley & Sons, Ltd.     

Beliefs and data on the relationship between consistency and accuracy of eyewitness testimony

Two studies concerned with consistency and accuracy of eyewitness testimony were conducted. In Study 1 potential jurors indicated the degree to which they considered that various witness on‐stand behaviours indicated testimonial accuracy. Witness statements that were inconsistent with previous statements were considered to be the strongest indicators of inaccuracy. Study 2 examined the relationship between consistency and accuracy of testimony. Witnesses viewed a film of a robbery and were interviewed twice (2 weeks apart) about the crime in a 4 (interview format)×2 (interview occasion) design. Regardless of whether consistency was operationalised in terms of direct contradictions between interviews, or degree of agreement on detail across interviews, no more than 10% of the variance in overall accuracy rate was explained by any individual measure. Number of contradictions and overall agreement between interviews did, however, make additive contributions to prediction of overall accuracy. Also, higher correlations between contradiction‐based consistency measures and interview two accuracy rate were detected. Neither consistency nor accuracy for specific testimonial dimensions were predictive of accuracy on the other dimensions, or overall accuracy. Copyright © 1999 John Wiley & Sons, Ltd.     

Medical disorder,harm, and damage

Theoretical Medicine and Bioethics - Jerome Wakefield’s harmful dysfunction analysis (HDA) of medical disorder is an influential hybrid of naturalist and normative theories. In order to...     

Forcing and the Universe of Sets: Must We Lose Insight?

Journal of Philosophical Logic - A central area of current philosophical debate in the foundations of mathematics concerns whether or not there is a single, maximal, universe of set theory....     

The effects of explicit “Not Present” and “Don't Know” response options on identification decisions in computer-administered lineups

Eyewitness researchers recommend that “not present” and “don't know” response options should be presented with police lineups. Although it is important that witnesses—most of whom are unlikely to be familiar with the identification task—are fully cognizant of all response options available to them, an understanding of how explicit non-identification options affect performance is lacking. Across four experiments, including 3,633 participants and 8 different stimulus sets, we tested the effects of including non-identification options in computer-administered lineups. When explicit non-identification options were presented, target-present and -absent choosing decreased. This decrease in choosing was characterized by a shift from filler identifications to lineup rejections. ROC analyses revealed that there was no overall difference in discriminability between guilty and innocent suspects depending on response option condition. On balance, the findings suggest that, in addition to informing witnesses about acceptable responses, displaying non-identification response options does not undermine identification performance.     

Refining the blank line-up procedure: How should we instruct eyewitnesses?

Presenting a blank line-up—containing only fillers—to witnesses prior to showing a real line-up might be useful for screening out those who pick from the blank line-up as unreliable witnesses. We show that the effectiveness of this procedure varies depending on instructions given to witnesses. Participants (N = 462) viewed a simulated crime and attempted to identify the perpetrator from a line-up approximately 1 week later. Rejecting a blank line-up was associated with greater identification accuracy and greater diagnosticity of suspect identifications, but only when witnesses were instructed prior to the blank line-up that they would view a series of line-ups; the procedure was ineffective for screening when witnesses were advised they would view two line-ups or received no instruction. These results highlight the importance of instructions used in the blank line-up procedure, and the need for better understanding of how to interpret choosing patterns in this paradigm.