Effects of retinal eccentricity and acuity on global-motion processing

The present study assessed direction discrimination with moving random-dot cinematograms at retinal eccentricities of 0, 8, 22, and 40?deg. In addition, Landolt-C acuity was assessed at these eccentricities to determine whether changes in motion discrimination performance covaried with acuity in the retinal periphery. The results of the experiment indicated that discrimination thresholds increased with retinal eccentricity and directional variance (noise), independent of acuity. Psychophysical modeling indicated that the results for eccentricity and noise could be explained by an increase in channel bandwidth and an increase in internal multiplicative noise.     

POST-TRAUMATIC STRESS REACTIONS AMONGST RESCUE WORKERS AFTER A MAJOR RAIL ACCIDENT

Abstract

Rescue tasks under heavy strain may act as traumatic events creating stress reactions among the rescue workers. After a major rail accident the rescue workers were examined by questionnaire at 3 and 7 months postaccident using the General Health Questionnaire-28 (GHQ), Impact of Event Scale (IES) and a structured questionnaire made for the purpose. Eighteen percent of the 77 rescue workers who participated in the study had GHQ-case-score and 10% had IES-case-score at 7 months using the usual GHQ-cut-off (4/5) and a low IES-cut-off (19/20). For the case-scorers there was a tendency towards increased GHQ- and IES-scores from 3 to 7 months. Five (6%) had post-traumatic stress disorders (PTSD) of low to moderate severity at 7 months.     

Defense mechanisms: An approach from the perspective of personal construct psychology

The psychoanalytic concept of defense mechanisms was theoretically and empirically approached from the perspective of personal construct psychology, in an attempt to investigate its cognitive components. Thirty neurotic clients of the Psychotherapeutic Center in Stuttgart, Federal Republic of Germany, were investigated by means of the Questionnaire for Defense Categories (Ehlers & Peter, 1989) and the Repertory Grid Test (Kelly, 1955). Tight construing, extremity of emotional evaluation, construal of the symptom as having positive implications, and construed similarity between certain aspects of the self were observed in clients who frequently used the defense mechanisms denial, rationalization, and turning against the object.     

A Spiritual Revolution in Denmark?

ABSTRACT

Based on data from the Danish part of the European Values Study 1981–2008, this article explores the validity of the claim for a spiritual revolution as proposed by Paul Heelas and Linda Woodhead. The article suggests an operationalisation of spirituality. The results of the analyses are that religious values—Christian faith as well as spirituality—tend to be stable over an individual’s life course. This suggests that, if there is a spiritual revolution, it must be the product of cohort replacement. If a spiritual revolution is taking place, Christian faith would be expected to decline in younger cohorts while spirituality would increase, but an analysis of cohort support for Christian faith and spirituality from 1981 to 2008 shows that both were constant across cohorts. Thus Danish data contain no indication that a spiritual revolution is taking place or will take place. Finally, we show that, contrary to theoretical expectations, spirituality and Christian faith are strongly correlated. A closer analysis reveals an indirect and more complicated support for parts of the theory since the two variables are explained by different factors and it shows that Christian faith, but not spirituality, is correlated with morality.     

Negotiating ending: A qualitative study of the process of ending psychotherapy

Objectives: When psychotherapy is open-ended, the question of termination is a matter for negotiation. A model based on both content and the process of ending may explain how ‘good enough’ psychotherapies can be brought to ‘good enough’ endings.

Design: Twelve processes of ending were explored through a combination of audio recordings made during therapy sessions and post-therapy interviews with clients and therapists. Therapies had been tailored to the needs of the clients and were based on a broad spectrum of theoretical affiliations.

Methods: A procedure for systematic text condensation was used on a case-by-case basis. Issues surrounding the initiation and negotiation of ending were pointed out in each case and were then compared across cases.

Results: The initiation of ending and exchanges concerned with when and how to end therapy unfolded as a concerted process because both parties seemed to be aware that the theme of ending contained a potential challenge to the alliance. Dual affect regulation, implicit communication and a future-oriented perspective were important features. Structural elements such as schedule changes and temporary breaks served several psychological functions. Therapies seemed to reach ‘good enough’ endings when the client and therapist joined in their efforts to resolve basic ambivalences embedded in the decision to terminate contact with the affirmation of a continuing emotional bond.     

Discriminating direction of motion trajectories from angular speed and background information

The effects of a background scene on the perception of the trajectory of an approaching object and its relation to changes in angular speed and angular size were examined in five experiments. Observers judged the direction (upward or downward) of two sequentially presented motion trajectories simulating a sphere traveling toward the observer at a constant 3-D speed from a fixed distance. In Experiments 1–4, we examined the effects of changes in angular speed and the presence of a scene background, with changes in angular size based either on the trajectories being discriminated or on an intermediate trajectory. In Experiment 5, we examined the effects of changes in angular speed and scene background, with angular size either constant or consistent with an intermediate 3-D trajectory. Overall, we found that (1) observers were able to judge the direction of object motion trajectories from angular speed changes; (2) observers were more accurate with a 3-D scene background, as compared with a uniform background, suggesting that scene information is important for recovering object motion trajectories; and (3) observers were more accurate in judging motion trajectories based on angular speed when the angular size function was consistent with motion in depth than when the angular size was constant.     

Mechanisms of change in cognitive behaviour therapy for panic disorder: The role of panic self-efficacy and catastrophic misinterpretations

The efficacy of cognitive behavioural therapy (CBT) for panic disorder with or without agoraphobia (PD) is well-established; however, little is known about the underlying change processes of clinical improvement during therapy. According to cognitive theories, CBT for PD primarily works by changing catastrophic misinterpretations of bodily symptoms and panic attacks. However, panic self-efficacy, i.e. the perceived ability to cope with panic attacks, has also been suggested as an important change mechanism in CBT for PD. The aim of the study was to investigate if change in catastrophic misinterpretations and panic self-efficacy mediated change in the level of anxiety during the course of thirteen sessions of group CBT for PD. Forty-five participants completed weekly self-report measures of the possible cognitive mediators and the level of anxiety throughout therapy. The results indicated that within-person change in panic self-efficacy in one session, but not in catastrophic misinterpretations, predicted within-person level of anxiety symptoms the following week. However, in a reversed analysis, prior change in level of anxiety symptoms also predicted change in panic self-efficacy the following session. These results support panic self-efficacy as a mediator of change in CBT for PD, although a reciprocal causal relationship between panic self-efficacy and level of anxiety seems to be implied.     

Epistemic dependence in interdisciplinary groups

In interdisciplinary research scientists have to share and integrate knowledge between people and across disciplinary boundaries. An important issue for philosophy of science is to understand how scientists who work in these kinds of environments exchange knowledge and develop new concepts and theories across diverging fields. There is a substantial literature within social epistemology that discusses the social aspects of scientific knowledge, but so far few attempts have been made to apply these resources to the analysis of interdisciplinary science. Further, much of the existing work either ignores the issue of differences in background knowledge, or it focuses explicitly on conflicting background knowledge. In this paper we provide an analysis of the interplay between epistemic dependence between individual experts with different areas of expertise. We analyze the cooperative activity they engage in when participating in interdisciplinary research in a group, and we compare our findings with those of other studies in interdisciplinary research.     

A Confirmatory Approach to Examining the Factor Structure of the Strengths and Difficulties Questionnaire (SDQ): A Large Scale Cohort Study

The aim of this study was to examine the factor structure of the Strengths and Difficulties Questionnaire (SDQ) using a Structural Confirmatory Factor Analytic approach. The Danish translation of the SDQ was distributed to 71,840 parents and teachers of 5–7 and 10–12-year-old boys and girls from four large scale cohorts. Three theoretical models were examined: 1. a model with five first order factors (i.e., hyperactivity/inattention, conduct, emotional, peer problems and prosocial), 2. a model adding two internalising and externalising second order factors to model 1, and 3. a model adding a total difficulties second order factor to model 1. Model fits were evaluated, multi-group analyses were carried out and average variance extracted (AVE) and composite reliability (CR) estimates were examined. In this general population sample, low risk sample models 1 and 2 showed similar good overall fits. Best model fits were found when two positively worded items were allowed to cross load with the prosocial scale, and cross loadings were allowed for among three sets of indicators. The analyses also revealed that model fits were slightly better for teachers than for parents and better for older children than for younger children. No convincing differences were found between boys and girls. Factor loadings were acceptable for all groups, especially for older children rated by teachers. Some emotional, peer, conduct and prosocial subscale problems were revealed for younger children rated by parents. The analyses revealed more internal consistency for older children rated by teachers than for younger children rated by parents. It is recommended that model 1 comprising five first order factors, or alternatively model 2 with additionally two internalising/externalising second order factors, should be used when employing the SDQ in low risk epidemiological samples.