No time for powers

In this paper, I will investigate the compatibility of different metaphysics of time with the powers view. At first sight, it seems natural to combine some sort of powers ontology with a dynamical view of time, since the dynamic character of powers appears to account for the progression of time. Accordingly, it has been argued that a powers ontology, which is supposed to be inherently dynamic and productive, is incompatible with eternalism, which does not allow for any sort of real productivity. After having reviewed these arguments, I will argue that the powers view is not only incompatible with eternalism but also with the moving spotlight view and growing block theory. I will go on to argue that the specific notion of activity that the powers ontology provides is not straightforwardly compatible with presentism either.     

Effects of a post-hospitalization group health education programme for patients with coronary heart disease

Abstract

Effects of a post-hospitolization group health education programme for patients with coronary heart disease. A health education programme was offered to groups of coronary heart patients and their partners after discharge from hospital. A randomized pre-test post-test control group design was used to evaluate the effects of this experimental intervention. The health education programme was offered to 109 coronary heart patients in groups of between five and eight patients together with their partners in addition to standard medical care and physical training. A control group of 108 patients received only standard medical care and physical training.

The intervention consisted of eight weekly two-hour group health education sessions and one follow-up session. All sessions focused on the promotion of healthy habits and the reduction of adverse psychosocial consequences of the incident.

In the short term (about four months after the incident) the health education programme showed statistically significant intervention effects on knowledge about coronary heart diseases, smoking cessation, healthy eating habits and the number of consultations with the family physician, but no effects on emotional distress. In the long term (one year after the incident) there was only a significant intervention effect on smoking cessation.

These results suggest that the effects of the programme are modest, especially in terms of maintenance of behavioural change. As a consequence, it is suggested that the programme should not be offered to all coronary patients during cardiac rehabilitation, but only to those who can be expected to profit most from it.     

The Job Demand-Control-Social Support Model and Wellness/Health Outcomes: A European Study

The EUROTEACH study which is reported here, comprised 2796 secondary school teachers from 13 European countries. The study firstly aimed at testing an extended Job Demand-Control-Social support (JDCS) model and checking its gender specificity. While this study failed to provide evidence for the buffer hypothesis derived from the JDCS-model, the strain hypothesis was mostly supported. Additional job conditions tested in this study proved to be important predictors of the outcome variables (emotional exhaustion, depersonalisation, personal accomplishment, somatic complaints and job satisfaction) and standard of living indicators also added explained variance in these outcomes. The study proved that the JDCS model cannot be called a male model. Secondly the study looked at the comparability of 3 European regions (South, West, East). Apart from important regional differences in job conditions, standard of living indicators and outcomes, the most important finding is that the JDCS model explains most variance in outcome variables in Western Europe, and the least in Eastern Europe, and thus seems to suffer from a Western bias.     

SOCIAL SHARING IN ANTICIPATION OF CARDIAC SURGERY: WHO TALKS MORE AND WHY

This study presents the stress and sharing model, which was developed in order to predict the extent to which patients anticipating cardiac surgery, share their emotions. The model hypothesizes that preoperative sharing of emotions mediated by need, is positively related to surgery-related stress measured independently, and in comparison to the roommates. The model was tested for surgery-related and surgery-unrelated feelings. One hundred and fifty-seven Greek patients participated in the study. The variables included in the model were measured daily, using self-reports. Results show a good fit of the model only for surgery-related feelings (χ²=4.688, p=0.321). The study shows that patients anticipating surgery share their emotions in the same way as patients recovering from stressful or traumatic events. Stressed patients experience the need to focus on the threat (verbally) and not to be ‘distracted’ by talking about irrelevant topics. These findings have important implications for the design of preparatory interventions for surgical patients.     

The effects of temporal synchrony on the perceived organization of elements in spatially symmetric and asymmetric grids

Three experiments were conducted to investigate the influence of fast temporally segmented presentations of alternate rows or columns on the perception of grids of either symmetrically or asymmetrically spaced dot-like stimuli. Experiments 1a and 1b demonstrated that observers were able to discriminate between temporally segmented presentations of rows/columns stimuli, but showed a reduced performance in discrimination between non-temporally segmented stimuli and temporally segmented stimuli that were spatially unstructured. Experiment 2 confirmed the influence of temporally segmented presentations of rows and columns using elements whose mean luminance summed to the same as the display background. Experiment 3 demonstrated that the influence of temporal cues reduced when display elements were asymmetrically spaced. The results are discussed in terms of the influence of external spatio-temporal factors on the neural mechanisms of visual grouping.     

Agency,Teleological Control and Robust Causation

I propose a compatibilist theory of agency and responsibility, according to which an agent is responsible for an effect, if and only if, she is the earliest source of robust causation over it, via an action she carried out in the service of her long term interests. This theory deploys a notion of teleological control, which is a type of guidance-control of the agent over the effect and it involves action plans and means-end reasoning. The theory makes room for degrees of responsibility, and accounts for the distinction between compulsion and determination. The teleological control view is informed by neuroscience and cognitive theory, and while it is indifferent to the distinction between determinism and indeterminism, it contends that the property of natural laws relevant to agency is the presence of successive stages of attractor and bifurcation dynamics. While the former grounds robust causation over effects of actions, the latter limits the temporal range of robustness, allowing us to characterize responsibility in terms of the earliest sources of robust causation.     

Cortico-limbic-striatal circuits subserving different forms of cost-benefit decision making

Research on the neural basis that underlies decision making in humans has revealed that these processes are mediated by distributed neural networks that incorporate different regions of the frontal lobes, the amygdala, the ventral striatum, and the dopamine system. In the present article, we review recent studies in rodents investigating the contribution of these systems to different forms of cost-benefit decision making and focus on evaluations related to delays, effort, or risks associated with certain rewards. Anatomically distinct regions of the medial and orbital prefrontal cortex make dissociable contributions to different forms of decision making, although lesions of these regions can induce variable effects, depending on the type of tasks used to assess these functions. The basolateral amygdala and the nucleus accumbens play a more fundamental role in these evaluations, helping an organism overcome different costs to obtain better rewards. Dopamine activity biases behavior toward more costly yet larger rewards, although abnormal increases in dopamine transmission can exert opposing actions on different types of decision making. The fact that similar neural circuits are recruited to solve these types of problems in both humans and animals suggests that animal models of decision making will prove useful in elucidating the mechanisms mediating these processes.     

Preferred changes in power differences: Effects of social comparison in equal and unequal power relations

Efforts to change power differences with others who are equal and unequal in power were examined. According to social comparison theory (Festinger, 1954; Rijsman, 1983), people prefer slight superiority in power over comparison others. In Experiment 1, 93 participants imagined working with two others in a group. Group members varied in hierarchical rank and on exact power scores. Participants indicated their preferred changes in power differences. Social comparison theory was supported regarding rank differences, but not regarding power scores. In Experiment 2, 145 participants imagined a similar group setting. Group members were equal, unequal, or very unequal in power. Social comparison theory was supported regarding ranks: power differences with an equally powerful person were increased more often than with a less powerful person. Power scores again yielded no effects. This suggests that social comparisons of power are based on rank and not interval information.     

When are workload and workplace learning opportunities related in a curvilinear manner? The moderating role of autonomy

Building on theoretical frameworks like the Job Demands Control model and Action Theory we tested whether the relationship between workload and employees' experiences of opportunities for workplace learning is of an inverted u-shaped nature and whether autonomy moderates this relationship. We predicted that – at moderate levels of autonomy – workload was positively associated with learning opportunities at low levels of workload, but negatively at high levels of workload. Also, we predicted that low autonomy prevents positive effects of moderate workload from materializing whereas high autonomy makes high workload less destructive to the learning process. Furthermore, we examined whether learning opportunities increase particularly as a function of higher matched levels of workload and autonomy and whether mismatch between workload and autonomy is particularly detrimental to the learning process. We found support for these ideas in two large and heterogeneous samples of working adults using moderated and polynomial regression analyses and subsequent response surface methodology. These results integrate conflicting prior findings and extend Karasek's (1979) active learning hypothesis. They also have clear implications for job redesign practices aiming to promote workplace learning opportunities.