Grasping of extrafoveal targets: A robotic model

We present a computational model of grasping of non-fixated (extrafoveal) target objects which is implemented on a robot setup, consisting of a robot arm with cameras and gripper. This model is based on the premotor theory of attention (Rizzolatti et al., 1994) which states that spatial attention is a consequence of the preparation of goal-directed, spatially coded movements (especially saccadic eye movements). In our model, we add the hypothesis that saccade planning is accompanied by the prediction of the retinal images after the saccade. The foveal region of these predicted images can be used to determine the orientation and shape of objects at the target location of the attention shift. This information is necessary for precise grasping. Our model consists of a saccade controller for target fixation, a visual forward model for the prediction of retinal images, and an arm controller which generates arm postures for grasping. We compare the precision of the robotic model in different task conditions, among them grasping (1) towards fixated target objects using the actual retinal images, (2) towards non-fixated target objects using visual prediction, and (3) towards non-fixated target objects without visual prediction. The first and second setting result in good grasping performance, while the third setting causes considerable errors of the gripper orientation, demonstrating that visual prediction might be an important component of eye–hand coordination. Finally, based on the present study we argue that the use of robots is a valuable research methodology within psychology.     

The concept of egocentrism in the context of Piaget’s theory

In this paper, we trace the origin and development of the concept of egocentrism in Piaget’s work. We evaluate a number of criticisms that have been leveled against the concept of egocentrism. Based on our evaluation, we propose a reconceptualization of the concept of egocentrism as a decentering process with different phases that is recapitulated at different stages of development. We provide examples of the decentering process for the sensorimotor, preoperational, concrete-operational, and formal operational stages.Piaget introduced the concept of egocentrism in his early writings in the 1920s to describe general characteristics of the preschool child. Since its introduction, the concept of egocentrism has received considerable theoretical and empirical attention and has drawn numerous criticisms. Piaget attributed these criticisms to serious misunderstandings of the concept of egocentrism. Indeed, Piaget (1945/1962, p. 285, fn) admitted that the choice of the term egocentrism was “unfortunate”, and he apologized (Piaget & Inhelder, 1948/1967, p. 220) for having dwelt on this expression for the last twenty-five years.In this paper, we trace the origins of the concept of egocentrism in Piaget’s writings and examine the subsequent changes to this concept. We examine some of the criticisms leveled against the concept of egocentrism and conclude that the concept of egocentrism remained ambiguous in Piaget’s writings. Finally, we suggest a revision of the concept of egocentrism that addresses these ambiguities.     

Navigating Public Prejudices: The Impact of Media and Attitudes on High-Profile Female Political Leaders

Predictions from the stereotype content model (SCM; Fiske et al. 2002) that suggest high-status career women are perceived as competent but cold were tested with a sample of college students in California (N?=?294; 51% female; M age?=?21.49). Participants completed measures of sexism and attitude extremity, read a positive or negative article about a female senator, and rated her warmth and competence. Results indicate positive media coverage counteracts the competent but cold prediction of the SCM. In the context of negative media, extreme hostile sexism predicted evaluations of low warmth and competence; however, males with less extreme sexist attitudes had greater warmth and competence evaluations. Results are discussed in relation to the SCM and worldview confirmation hypothesis.     

Psychosoziale Versorgung von Krebspatienten

Objectives

The aim of this study was to determine rates of psychooncological care for cancer inpatients and outpatients under routine conditions in a large University hospital. The percentage of patients who received care was analyzed and compared with self-rated and expert rated supportive care needs.

Methods

The percentage of inpatients who received psychooncological care was calculated by comparing the number of cancer patients treated at the hospital as documented by the local tumor registry (n=1,979) with the number of patients treated by a psychooncologist in that hospital as documented by the hospital??s psychooncological consultation liaison service. The percentage of outpatients who received psychooncological care was calculated by comparing the number of incident cancer cases as documented by the local tumor registry (n=5,886) with the number of patients who received at least one consultation at the local tumor counseling centre. Supportive care needs were estimated by analyzing data of a prospective patient survey in the same hospital (n=1,803) using the Hospital Anxiety and Depression Scale and single items to determine social burden and the wish for emotional support.

Results

The results showed that 11% of inpatients and outpatients (n=234 and n=638, respectively) received psychooncological care. Social care needs were prevalent in 37% and psychological care needs in 52% of the patients during the stay in hospital and in 42% (social and psychological) 6 months later. Of the patients 41% expressed the need to see a social worker and 29% to see a psychologist. Large differences were found between patients with different tumor entities.

Conclusion

Psychooncological care delivered to cancer patients under routine conditions was below the actual rate required as estimated by screening instruments and as expressed by the patients.     

Pr?diktoren tumorassoziierter Fatigue

Fatigue is a serious cancer-related syndrome reported by cancer patients during and after treatment. Especially the impact of chronic fatigue on quality of life is substantial. The aim of this study was to identify predictors of fatigue after finishing treatment from an early stage of the cancer treatment. A sample of 551 cancer patients with heterogeneous diagnoses completed questionnaires assessing fatigue, psychological and psychosomatic data plus treatment data. The patients were recruited from an acute care hospital (t1) and the participants completed the questionnaire 2?C2.5 years after treatment (t2). Regression analysis showed that the strongest predictor of later fatigue was fatigue during the therapy. Other impact factors are radiotherapy and pain. The results suggest that the diagnosis and treatment of acute fatigue should be carried out at an early stage of cancer treatment to prevent chronic fatigue. Suitable diagnostic methods and treatment options will be presented.     

Seelische Gesundheitsvorsorge f��r Kinder krebskranker Eltern

Children of cancer patients are increasingly being paid attention to as target group for family-based mental health prevention concepts in psychosocial oncology. Based on the long-term experiences with the concept Children of Somatically Ill Parents (COSIP) for child-centred medical family counselling, which was developed at the counselling service COSIP at the Hamburg University Medical Centre, a specialized manual was developed for the context of psychosocial care in oncology, which is currently being tested in a multi-center approach. In this article the theoretical framework and the practical steps of this manualized concept in caring for families with a parent having cancer are summarized. Characteristic elements are the flexible handling of the three system levels parents, family and child in the counselling setting as well as focussing on previously defined intervention goals which are expected to strengthen the coping resources in the family and the children. Perspectives for clinical practice and research are discussed.     

Looking from the Outside/In: Re-thinking Research Ethics Review

This paper shares my reflections on the research ethics review process, from the point of view of both a qualitative researcher and a member of an institutional research ethics review board. By considering research ethics review, first as practice, then as policy, as a relationship and, finally, as a performance, I attempt to outline a new vision of research ethics, one that engages seriously with the relationship between receiving ethics approval, and conducting ethical research.     

Two (or three) is one too many: testing the flexibility of contextual cueing with multiple target locations

Visual search for a target object is facilitated when the object is repeatedly presented within an invariant context of surrounding items ("contextual cueing"; Chun & Jiang, Cognitive Psychology, 36, 28-71, 1998). The present study investigated whether such invariant contexts can cue more than one target location. In a series of three experiments, we showed that contextual cueing is significantly reduced when invariant contexts are paired with two rather than one possible target location, whereas no contextual cueing occurs with three distinct target locations. Closer data inspection revealed that one "dominant" target always exhibited substantially more contextual cueing than did the other, "minor" target(s), which caused negative contextual-cueing effects. However, minor targets could benefit from the invariant context when they were spatially close to the dominant target. In sum, our experiments suggest that contextual cueing can guide visual attention to a spatially limited region of the display, only enhancing the detection of targets presented inside that region.     

Discrete Dualities for Double Stone Algebras

We present two discrete dualities for double Stone algebras. Each of these dualities involves a different class of frames and a different definition of a complex algebra. We discuss relationships between these classes of frames and show that one of them is a weakening of the other. We propose a logic based on double Stone algebras.     

Monadic MV-algebras are Equivalent to Monadic ?-groups with Strong Unit

In this paper we extend Mundici??s functor ?? to the category of monadic MV-algebras. More precisely, we define monadic ?-groups and we establish a natural equivalence between the category of monadic MV-algebras and the category of monadic ?-groups with strong unit. Some applications are given thereof.