Optimization of Blocked Designs in fMRI Studies

Blocked designs in functional magnetic resonance imaging (fMRI) are useful to localize functional brain areas. A blocked design consists of different blocks of trials of the same stimulus type and is characterized by three factors: the length of blocks, i.e., number of trials per blocks, the ordering of task and rest blocks, and the time between trials within one block. Optimal design theory was applied to find the optimal combination of these three design factors. Furthermore, different error structures were used within a general linear model for the analysis of fMRI data, and the maximin criterion was applied to find designs which are robust against misspecification of model parameters.     

Subjective well‐being in times of social change: Congruence of control strategies and perceived control

This paper investigates the association between perceptions of broader changes in the social‐ecological context and individuals’ subjective well‐being (SWB). Macro‐level societal changes such as globalization or demographic change give rise to new demands for individual functioning at work and/or in the family. Such new demands associated with social change are stressful and likely to be related to lower levels of SWB. Being active agents, individuals attempt to deal with social change and its increasing demands to protect their SWB. The present study investigates which kinds of control strategies are most effective in protecting one's SWB. Specifically, we predicted that control strategies of goal engagement will be most effective under conditions of perceived high control, and control strategies of goal disengagement will be most effective under conditions of perceived low control. In a large sample of 2537 German adults, work‐ and family‐related demands associated with social change were found to be negatively linked to SWB. Moreover and in line with the motivational theory of lifespan development, control strategies of goal engagement and disengagement were beneficial for SWB to the extent that they matched the perceived control of the demands associated with social change.     

The interplay of received social support and self-regulatory factors in smoking cessation

Objective: In smoking cessation, individual self-regulation and social support have both proven to be useful. However, the roles of self-regulatory processes and social support are mostly examined separately. The present study aims at examining the unique and joint interactive effects of self-regulation as specified in the health action process approach (HAPA) and social support on smoking cessation. The study tested whether social support can compensate for low levels of self-regulation or whether synergistic effects emerge.

Design & Measures: Around a self-set quit date, 99 smokers completed baseline questionnaires on HAPA-variables, smoking-specific received social support and smoking cessation (continuous abstinence and point prevalence), with a follow-up Cpproximately 29?days after the quitdate.

Results: Social support moderated the association between volitional self-efficacy and smoking, as well as coping planning and smoking but not between action planning and smoking. No compensatory effect of social support for lower levels of individual regulation emerged but the combination of high levels of the individual variables and social support was related to successful smoking cessation, indicating a synergistic effect.

Conclusions: The results confirm the importance of examining both self-regulation and social factors in smoking cessation. This should be considered when developing future interventions for smoking cessation.     

Coping among children and adolescents with chronic illness

The present study was aimed to investigate age and gender effects on coping with everyday stressors among children and adolescents with chronic illness and healthy controls. Patients (8–13 years of age) with asthma (n=47), atopic dermatitis (n=52), and cancer (n=57) were compared to healthy controls (n=158) matched by age, gender, and grade. Self-report data on coping with academic and interpersonal stressors were collected. The primary results indicated that coping with everyday stressors was improved in children and adolescents with chronic illness compared to healthy controls. Thus, patients reported less passive avoidance on cross-situational coping and tended to show more situation-specific coping with social and school-related stressors than healthy controls. Additionally, among the clinical groups, patients with atopic dermatitis and cancer scored higher on positive self-instructions than patients with asthma. Conclusively, the results suggest that coping with a chronic illness may lead to more effective coping with everyday stressors. Implications for evaluating coping styles in patients with chronic illness are discussed.     

What clocks tell us about the neural correlates of spatial imagery

We review a series of experimental studies aimed at answering some critical questions about the neural basis of spatial imagery. Our group used functional magnetic resonance imaging (fMRI) to explore the neural correlates of an online behaviourally controlled spatial imagery task without need for visual presentation—the mental clock task. Subjects are asked to imagine pairs of times that are presented acoustically and to judge at which of the two times the clock hands form the greater angle. The cortical activation elicited by this task was contrasted with that obtained during other visual, perceptual, verbal, and spatial imagery tasks in several block design studies. Moreover, our group performed an event‐related fMRI study on the clock task to investigate the representation of component cognitive processes in spatial imagery. The bulk of our findings demonstrates that cortical areas in the posterior parietal cortex (PPC), along the intraparietal sulcus, are robustly involved in spatial mental imagery and in other tasks requiring spatial transformations. PPC is bilaterally involved in different kinds of spatial judgement. Yet the degree to which right and left PPC are activated in different tasks is a function of task requirements. From event‐related fMRI data we obtained evidence that left and right PPC are activated asynchronously during the clock task and this could reflect their different functional role in subserving cognitive components of visuospatial imagery.     

Coaching

Coaching ist in Wirtschaftsunternehmen weit verbreitet. Angesichts der stetig steigenden Ver?nderungsgeschwindigkeit der Arbeits- und pers?nlichen Lebenswelten suchten zun?chst Führungskr?fte professionelle Coaches, die ihnen als vertraute Gespr?chspartner zur Seite standen. Coachingma?nahmen werden aber auch zunehmend von Politikern, Medienvertretern, Künstlern und Freiberuflern nachgefragt. Die derzeitigen Coachingkonzepte enthalten zumeist eine Kombination von allgemein-psychologischen, kognitiv-verhaltensorientierten, psychodynamischen und systemischen Techniken, modifiziert durch die Lebenserfahrung und Weltanschauung der Coaches. Es existiert eine Vielzahl eklektischer Praktiken, die theoretisch nicht koh?rent begründet und wissenschaftlich nicht verl?sslich evaluiert sind. Da Coaching in der Praxis h?ufig eine Form von Psychohygiene und Psychotherapie für Gesunde darstellt, ist es nahe liegend die Ergebnisse psychotherapeutischer Theoriebildung, Praxiserfahrung und Forschung als Grundlage des Coaching zu nutzen. Drei wissenschaftlich fundierte Aspekte des Coaching lassen sich herausstellen: Die hilfreiche Beziehung, kognitiv-verhaltensorientiertes Training und psychodynamisches Verstehen. Darüber hinaus ist es viel versprechend die Methoden der Psychotherapieforschung zur Untersuchung von Ergebnis und Prozess von Coachingma?nahmen anzuwenden.     

Coaching

Zusammenfassung Coaching ist in Wirtschaftsunternehmen weit verbreitet. Angesichts der stetig steigenden Ver?nderungsgeschwindigkeit der Arbeits- und pers?nlichen Lebenswelten suchten zun?chst Führungskr?fte professionelle Coaches, die ihnen als vertraute Gespr?chspartner zur Seite standen. Coachingma?nahmen werden aber auch zunehmend von Politikern, Medienvertretern, Künstlern und Freiberuflern nachgefragt. Die derzeitigen Coachingkonzepte enthalten zumeist eine Kombination von allgemein-psychologischen, kognitiv-verhaltensorientierten, psychodynamischen und systemischen Techniken, modifiziert durch die Lebenserfahrung und Weltanschauung der Coaches. Es existiert eine Vielzahl eklektischer Praktiken, die theoretisch nicht koh?rent begründet und wissenschaftlich nicht verl?sslich evaluiert sind. Da Coaching in der Praxis h?ufig eine Form von Psychohygiene und Psychotherapie für Gesunde darstellt, ist es nahe liegend die Ergebnisse psychotherapeutischer Theoriebildung, Praxiserfahrung und Forschung als Grundlage des Coaching zu nutzen. Drei wissenschaftlich fundierte Aspekte des Coaching lassen sich herausstellen: Die hilfreiche Beziehung, kognitiv-verhaltensorientiertes Training und psychodynamisches Verstehen. Darüber hinaus ist es viel versprechend die Methoden der Psychotherapieforschung zur Untersuchung von Ergebnis und Prozess von Coachingma?nahmen anzuwenden.      

Isomorphism and Equational Equivalence of Continuous λ-Models

We will present several results on two types of continuous models of -calculus, namely graph models and extensional models. By introducing a variant of Engeler's model construction, we are able to generalize the results of [7] and to give invariants that determine a large family of graph models up to applicative isomorphism. This covers all graph models considered in the litterature so far. We indicate briefly how these invariants may be modified in order to determine extensional models as well.Furthermore, we use our construction to exhibit graph models that are not equationally equivalent. We indicate once again how the construction passes on to extensional models.     

Influence of win-loss ratio on performance,satisfaction and preference for opponents

Hypotheses about the preference for opponents in competitive situations, about performance under various win-loss ratios, and about task and opponent satisfaction under various win-loss ratios were tested. A 5 × 5 latin square with four replications and a repeated measure factor of trials was the design used with 20 female college students as subjects. The five different win percents were W₁₀, W₃₀, W₅₀, W₇₀, and W₉₀. A manipulative maze task was used with subjects receiving 20 trials against each of five confederate opponents. Results indicated that (a) when a person knows little or nothing about her ability level she initially prefers to compete with opponents of low ability but with each subsequent contest opponents of higher ability levels are preferred; (b) subjects performed better in the W₅₀ condition; (c) task satisfaction is higher when the percent of wins is equal to or greater than the percent of losses; and (d) opponent satisfaction is greater for opponents who perform equal to or better than the subject.