Entrepreneurial orientation: A psychological model of success among southern African small business owners

This study examines the relationship of the psychological construct Entrepreneurial Orientation (EO) with business success in a sample of N?=?248 southern African business owners. We reintroduce the individual in EO research and show the importance of the person of the entrepreneur for business performance: Hierarchical regression analyses revealed significant relationships between EO components (personal initiative, achievement-, and risk-taking orientation) as well as overall EO and business performance. In addition, confirmatory factor analysis supported a single factor construct of EO that consists of learning, achievement, and autonomy orientation, competitive aggressiveness, innovative and risk-taking orientation, and of personal initiative.

In this study, we develop an individual-based psychological concept of Entrepreneurial Orientation (EO) and investigate the relationship between business owners' EO and business performance in southern Africa. EO has primarily been discussed from a firm-level perspective (e.g., ; ). It characterized businesses in their early years and was found to be important for firm success. In contrast, we apply a psychological approach with EO as an interindividual difference variable. Thus, our focus is the business owner and the general relationship between individual EO and performance of southern African small business owners.     

Rheological material functions for associating comb-shaped or H-shaped polymers A fractional calculus approach

Abstract

A rheological constitutive equation for associating comb-shaped or H-shaped polymer solutions is derived, which shows a unique power-law zone characterized by two time parameters and one power-law exponent in the terminal relaxation region. The constitutive equation is of fractional integral or fractional differential type and contains two additional parameters. A comparison with experimental data demonstrates very good agreement with the theoretical predictions. The material functions in the frequency domain represent a generalization of the well known Cole-Cole behaviour.     

On extremal axioms

In the paper translated here, Carnap and Bachmann shows that the apparently metalinguistic ‘extremal' axioms that are added to some axiom systems to the effect that the foregoing axioms are to apply as broadly, or as narrowly, as possible may be formulated directly as proper axioms. They analyze such axioms into four fundamental types, with the help of a concept of ‘complete’ isomorphism.     

Decision making under risk condition in patients with Parkinson's disease: a behavioural and fMRI study

We aimed to study whether previously described impairment in decision making under risky conditions in patients with Parkinson's disease (PD) is affected by deficits in using information about potential incentives or by processing feedback (in terms of fictitious gains and losses following each decision). Additionally, we studied whether the neural correlates of using explicit information in decision making under risk differ between PD patients and healthy subjects. We investigated ten cognitively intact PD patients and twelve healthy subjects with the Game of Dice Task (GDT) to assess risky decision making, and with an fMRI paradigm to analyse the neural correlates of information integration in the deliberative decision phase. Behaviourally, PD patients showed selective impairment in the GDT but not on the fMRI task that did not include a feedback component. Healthy subjects exhibited lateral prefrontal, anterior cingulate and parietal activations when integrating decision-relevant information. Despite similar behavioural patterns on the fMRI task, patients exhibited reduced parietal activation. Behavioural results suggest that PD patients' deficits in risky decision making are dominated by impaired feedback utilization not compensable by intact cognitive functions. Our fMRI results suggest similarities but also differences in neural correlates when using explicit information for the decision process, potentially indicating different strategy application even if the interfering feedback component is excluded.     

Extreme interpersonal sensitivity in family members

Abstract

The concept of extreme interpersonal sensitivity is introduced and the literature relating to it is reviewed. Although considerable clinical evidence gives credence to the relative ubiquity of this phenomenon in enmeshed families, the concept is only indirectly alluded to by family theorists. Extreme interpersonal sensitivity seems to be characteristic of a lack of individuation in the family system. Clinical examples are offered to clarify this concept.     

Logische analyse des Wahrscheinlichkeitsbegriffs

Ohne Zusammenfassung     

Eins-und Vieles-Problem in biologischer Betrachtung

Ohne Zusammenfassung