Understanding the multiframe caricature advantage for recognizing facial composites

Eyewitnesses often construct a “composite” face of a person they saw commit a crime, a picture that police use to identify suspects. We described a technique (Frowd, Bruce, Ross, McIntyre, & Hancock, 2007) based on facial caricature to facilitate recognition of these images: Correct naming substantially improves when composites are seen with progressive positive caricature, where distinctive information is enhanced, and then with progressive negative caricature, the opposite. Over the course of four experiments, the underpinnings of this mechanism were explored. Positive-caricature levels were found to be largely responsible for improving naming of composites, with some benefit from negative-caricature levels. Also, different frame-presentation orders (forward, reverse, random, repeated) facilitated equivalent naming benefit relative to static composites. Overall, the data indicate that composites are usually constructed as negative caricatures.     

The role of motion in learning new faces

Four experiments are reported that investigate the usefulness of rigid (head nodding, shaking) and nonrigid (talking, expressions) motion for establishing new face representations of previously unfamiliar faces. Results show that viewing a face in motion leads to more accurate face learning, compared with viewing a single static image (Experiment 1). The advantage for viewing the face moving rigidly seems to be due to the different angles of view contained in these sequences (Experiment 2). However, the advantage for nonrigid motion is not simply due to multiple images (Experiment 3) and is not specifically linked to forwards motion but extends to reversed sequences (Experiment 4). Thus, although we have demonstrated beneficial effects of motion for face learning, they do not seem to be due to the specific dynamic properties of the sequences shown. Instead, the advantage for nonrigid motion may reflect increased attention to faces moving in a socially important manner.     

Position of code and code for position: From isomorphism to a sensorimotor account of space perception

The paper starts with a discussion of the assumption that positions of the outer world are coded by the anatomical locations of firing neurons within retinotopic maps (“coding position by position”). This “code position theory” explains space perception by some kind of structural isomorphism since it implies that the perceptual space is based on a spatial structure within the brain. The axiom of structural isomorphism is rejected. Subsequently, a sensorimotor account of space perception is outlined according to which the spatial structure of the outer world is coded by the temporal structure of cortical processing. The basis is that action changes the perceiver's relationship to the outer world and, therefore, changes the representation of the outer world coded by the sensory responses of the brain. According to this view the code for position is not a spatial but a temporal structure resulting from action (“coding position by action”). The sensorimotor account offers a possible solution to the binding problem. The paper ends with some remarks on the possible origin and function of retinotopic representations.     

Equally attending but still not seeing: An eye-tracking study of change detection in own- and other-race faces

The present study aimed to investigate whether the faster change detection in own-race faces in a change blindness paradigm, reported by Humphreys, Hodsoll, and Campbell (2005) and explained in terms of people's poorer ability to discriminate other-race faces, may be explained by people's preferential attention towards own-race faces. The study by Humphreys et al. was replicated using the same stimuli, while participants’ eye movements were recorded. These revealed that there was no attentional bias towards own-race faces (analysed in terms of fixation order, number, and duration), but people still detected changes in own-race faces faster than in other-race faces. The current results therefore give further support for the original claim that people are less sensitive to changes made in other-race faces, when own and other-race faces are equally attended.     

Mega-Sized Concerns from the Nano-Sized World: The Intersection of Nano- and Environmental Ethics

As rapid advances in nanotechnology are made, we must set guidelines to balance the interests of both human beneficiaries and the environment by combining nanoethics and environmental ethics. In this paper, I reject Leopoldian holism as a practical environmental ethic with which to gauge nanotechnologies because, as a nonanthropocentric ethic, it does not value the humans who will actually use the ethic. Weak anthropocentrism is suggested as a reasonable alternative to ethics without a substantial human interest, as it treats nonhuman interests as human interests. I also establish the precautionary principle as a useful situational guideline for decisionmakers. Finally, I examine existing and potential applications of nanotechnology, including water purification, agriculture, mining, energy, and pollutant removal, from the perspective of weak anthropocentrism using the precautionary principle.     

Predicting the difficulty of complex logical reasoning problems

The aim of the present research was to develop a difficulty model for logical reasoning problems involving complex ordered arrays used in the Graduate Record Examination. The approach used involved breaking down the problems into their basic cognitive elements such as the complexity of the rules used, the number of mental models required to represent the problem, and question type. Weightings for these different elements were derived from two experimental studies and from the reasoning literature. Based on these weights, difficulty models were developed which were then tested against new data. The models had excellent predictive validity and showed the relative influence of rule based factors and factors relating to the number of underlying models. Different difficulty models were needed for different question types, suggesting that people used a variety of approaches and, at a wider level, that both mental models and mental rules may be used in reasoning.     

Are asymmetrical power relations a hidden obstacle to successful rehabilitation of violent men? An explorative study on the methodology to investigate shame

The study starts from Retzinger (1995), Retzinger and Scheff (2000) and Scheff and Retzinger's (2000, 2001) micro-sociological perspective on social bonds, with the general aim of constructing a model consisting of operationalized indicators that opens for a simplified ability to analyze the relationship between power relations and emotions in private and institutionalized meetings. Scheff & Retzinger have provided a comprehensive guide to how the state of the social bond can be decoded by the direct access to non-verbal data. But since this type of data is both difficult to obtain, difficult to analyze and time consuming, therapists need simplified methods that can provide insight into the state of social bonds. We also need a method that takes into account the issue of power relations — both power relations in society and power relations between the client and the therapist. The treatment of men with violence problems provides an example of how our model can be applied to therapeutic activity. The examination shows that it is possible to construct a model with operationalized indicators that facilitate visualization of the relationship between power and the quality of social bonds.     

Assessment by groups: Can value be added?

The scant research on the use of groups of assessors in selection processes indicates that group discussion in assessment centres and panel interviews results in little or no increase in predictive validity. Yet social psychological research suggests that there should be benefits from working in groups on such tasks.However, it also suggests reasons why such benefits might not be realized in practice, which derive from issues of conformity and identity. It is argued that these issues are often present in selection processes. Some hypotheses for research and some ways of redesigning processes to take account of them are presented. It is proposed that different ways of working in groups are appropriate for the different purposes that selection may be serving.     

Associations between rating content and self-other agreement in multi-source feedback

In a study of the ratings of managers' behaviour made by themselves, their supervisors, subordinates, and peers, it was found that degree of similarity between self-ratings and ratings by colleagues was significantly associated with three aspects of rating content: the observability of a behaviour, its desirability, and the degree to which it concerned technical rather than interpersonal activities. However, these associations with rating content depended on which of two indices of between-rater similarity was studied, in terms of either the correlation or the difference between ratings. The desirability of behaviour more influenced correlation measures of similarity, and the type of behaviour had more influence on difference scores: managers over-rated their interpersonal activities but not their technical effectiveness.