Subclinical delusional ideation and a self‐reference bias in everyday reasoning

Previous studies (e.g. Moller & Husby, 2000 ; Blackwood et al., 2004 ) have revealed that delusional thinking is accompanied by an exaggerated focus upon the self and upon stimuli that are perceived to be related to the self. The objective was to examine whether those high in subclinical delusional ideation exhibit a heightened tendency for self‐reference. Using a mixed design, healthy individuals, classified into high‐ and low‐scoring groups on the Peters et al. Delusions Inventory ( Peters, Day, & Garety, 1996 ), were compared on everyday reasoning tasks across three experiments. High‐PDI scorers, in contrast to the low‐PDI group, rated self‐referent objections to everyday arguments as stronger than other‐referent objections and formulated more self‐referent assertion‐based objections to everyday arguments. The findings support the notion that subclinical delusional ideation is linked to a self‐reference bias, which is evident in the sort of everyday thinking that people engage in when forming or evaluating their beliefs and which may contribute to delusion formation.     

Numeric comparison in a visually-guided manual reaching task

Nearly all studies on perception and cognition have used discrete responses to infer internal cognitive processes. In the current study, we demonstrate that visually-guided manual reaching can provide new opportunities to access internal processes over time. In each trial, participants were required to compare a single digit Arabic number presented on the center square with the standard, 5. Participants were asked to reach and touch one of three squares on the screen with their index finger while their hand movement trajectories were recorded: the left square for 1-4, the center for 5, and the right for 6-9. Direct evidence for an analogue representation of numbers was found in early as well as in later portions of hand trajectories, showing systematic shifts in position for small differences in numerical magnitude.     

Economic crisis and social capital: The story of two rural fishing communities

The aim of this study was to assess the impact of the Newfoundland and Labrador groundfish moratorium on the health and social wellness of two communities severely affected by the industry collapse. A qualitative study was conducted involving individual and group interviews with residents from communities in which differences (as indexed primarily by economic and demographic statistics) were observed. Using the concept of social capital and its associated themes of help and support, trust, leadership, and civic engagement, it was observed that the ‘high crisis community’ also demonstrated negative alterations in social and political characteristics which may have compromised its capacity to cope with the crisis and translated into detriments in resident wellness. Among a variety of identified challenges, out‐migration appeared to be the greatest threat as it has translated into an assortment of negative realities. The utility of social capital as a framework for understanding community crises is also discussed.     

Cognitive Behaviour Therapy: How is it Different with Older People?

This paper discusses the treatment of depression in older adults (over age 65) using cognitive therapy techniques first developed by Beck and colleagues. The focus of this paper concerns whether modifications of CBT are required in order to ensure maximal efficacy and discusses what modifications may be suitable by advocating conceptual and theoretical reasons for their adoption. Some important contextual factors may need to be taken account of when working with older people such as dealing with expectancies about lifespan, the likelihood of chronic physical illness and longevity and chronicity of the personal history of problems. It is our contention that much more has been written about outcome in CBT with older people than has been written about psychotherapy process issues. This paper aims to address this perceived gap in the literature.     

Differential activation patterns of occipital and prefrontal cortices during motion processing: Evidence from normal and schizophrenic brains

Visual motion perception is normally mediated by neural processing in the posterior cortex. Focal damage to the middle temporal area (MT), a posterior extrastriate region, induces motion perception impairment. It is unclear, however, how more broadly distributed cortical dysfunction affects this visual behavior and its neural substrates. Schizophrenia manifests itself in a variety of behavioral and perceptual abnormalities that have proved difficult to understand through a dysfunction of any single brain system. One of these perceptual abnormalities involves impaired motion perception. Motion processing provides an opportunity to clarify the roles of multiple cortical networks in both healthy and schizophrenic brains. Using fMRI, we measured cortical activation while participants performed two visual motion tasks (direction discrimination and speed discrimination) and one nonmotion task (contrast discrimination). Normal controls showed robust cortical activation (BOLD signal changes) in MT during the direction and speed discrimination tasks, documenting primary processing of sensory input in this posterior region. In patients with schizophrenia, cortical activation was significantly reduced in MT and significantly increased in the inferior convexity of the prefrontal cortex, an area that is normally involved in higher level cognitive processing. This shift in cortical responses from posterior to prefrontal regions suggests that motion perception in schizophrenia is associated with both deficient sensory processing and compensatory cognitive processing. Furthermore, this result provides evidence that in the context of broadly distributed cortical dysfunction, the usual functional specificity of the cortex becomes modified, even across the domains of sensory and cognitive processing.     

Strategies in landmark use by children, adults, and marmoset monkeys

Common marmosets (Callithrix jacchus jacchus), human children, and human adults learned to find a goal that was located in the center of a square array of four identical landmarks. The location of the landmark array and corresponding goal varied across trials, so the task could not be solved without using the landmark array. In Experiment 1, a matrix of discrete goal locations was presented and the landmarks surrounded and were adjacent to the correct location during training. After training, an expansion test was given in which the distance between landmarks was increased. Marmosets, children (ages 5–9), and adults all readily learned to use the landmarks to search accurately during training. On the expansion test, adults uniformly searched in the center of the array. Monkeys and children concentrated their searching near the landmarks rather than in the center. The monkeys, but not the children, searched more often on the directionally appropriate side of the landmarks than on other sides of the landmarks. In Experiment 2, children (ages 3–5) were trained with a continuous search space and with the goal farther from the landmarks so that a beaconing strategy rule could not be used. Several of the children failed to acquire the training task. Of those who learned to find the goal, three searched in the middle on expansion tests but most searched nearer to the landmarks. The “middle rule” strategy that is uniformly used by adult humans does not appear to be a preferred strategy for children or non-human primates.     

Factors influencing prescribing decisions in the treatment of depression: a social judgement theory approach

The under‐diagnosis and inappropriate treatment of depression in primary care has become a serious public health problem despite the development of many clinical guidelines to guide recognition and treatment of the disorder. This study aims to investigate decision‐making processes and to identify factors which influence general practitioners' (GPs) prescribing decisions and how these factors differ from those the guidelines recommend. Brunswik's lens model, from Social Judgement Theory (SJT), was employed to explore individual treatment decision policies of 40 GPs in the Grampian region of Scotland for 20 case vignettes. These individual policies were then aggregated and compared with those derived from guideline recommendations; important differences emerged between the two in the utilization of cues and there was considerable variation between GPs' policies. Guidelines placed more importance on the duration of symptoms whereas GPs gave weight also to particular symptoms, such as ‘thoughts of suicide’ and ‘sleep disturbance’ and patient treatment preference. GPs prescribed antidepressants at a greater rate than was recommended by the guidelines. The findings have important implications for implementation strategies, which maybe developed to accompany clinical guidelines. Copyright © 2002 John Wiley & Sons, Ltd.     

A Unification of Two Approaches to Vagueness: The Boolean Many-Valued Approach and the Modal-Precisificational Approach

The Boolean many-valued approach to vagueness is similar to the infinite-valued approach embraced by fuzzy logic in the respect in which both approaches seek to solve the problems of vagueness by assigning to the relevant sentences many values between falsity (or 0) and truth (or 1), but while the fuzzy-logic approach postulates linearly-ordered values (or ‘degrees’) between 0 and 1, the Boolean approach assigns to sentences values in a many-element (including infinite-element) complete Boolean algebra. On the modal-precisificational approach represented by Kit Fine, if a (vague) sentence is indeterminate in truth value in some world (possibly the actual world), it is taken to be true in one precisified world accessible from that world and false in another. This paper points to a way to unify these two approaches to vagueness by showing that Fine’s version of the modal-precisificational approach can be combined with the Boolean many-valued approach instead of supervaluationism, one of the most popular approaches to vagueness.     

Physical Attractiveness,Altruism and Cooperation in an Ultimatum Game

Explaining cooperative tendencies through an evolutionary lens has been problematic for theorists. Traditional explanations derive from theories of reciprocity, biological markets, and more recently via partner choice and sexual selection. The sexual selection hypothesis has been tested within game-theoretic frameworks gaining empirical support in explaining the evolution of altruism. Males have been found to be more altruistic towards attractive females. However, previous research has predominantly adopted a design where participants are not engaging with ‘real people’. Instead, participants make decisions when viewing images or hypothetical scenarios without visual cues. The present study aimed to investigate the sexual selection hypothesis using a face-to-face game theoretic framework. One hundred and thirty-eight participants played a 2-round ultimatum game with chocolate coins as the monetary incentive. We find, that physical attractiveness had no influence on generosity and cooperation when participants play a face-to-face ultimatum game. Instead, proposers were fair when allocating stakes, offering an average of half the endowment to responders. This study refutes the link between the sexual selection hypothesis and generosity when playing economic games with real people. Fairness appeared to drive generosity and cooperation.