Praxisleitfaden zur Betreuung von Diplomarbeiten

Die vorliegende Arbeit beschreibt erfolgskritische Faktoren des bei der Erstellung von Diplomarbeiten zwischen Studenten und Gutachter bestehenden Betreuungsverh?ltnisses und soll praktische Hinweise zu dessen Optimierung liefern.     

Differential supervision and cognitive structure effects on empathy and counseling effectiveness

The present study investigated the effects of didactic and experiential supervision procedures on the judged counseling effectiveness of high and low cognitive complexity counselor trainees. Subjects in the two supervision groups (N=16) were trained in attending, questioning, and reflection of feeling over three sessions. Training consisted of exposure to videotaped counseling models, discussion of the model's behavior with the supervisor, videotaped role playing of therapy, and discussion of the therapy with the supervisor. Training was exactly the same for both groups except for supervision. A control group (N=8) did not receive any training. All subjects, including controls, were pre- and post-tested for counseling effectiveness as measured by judged tape ratings on the 25-item Counselor Effectiveness Scale and four scales designed to assess affective, exploratory, listening, and honest labeling responses.High complex subjects responsed more favorably to the didactic supervision significantly outperforming both the high complex controls and the low complex didactic subjects on four of the five dependent measures, whereas high and low complex subjects did not respond differentially to the experiential supervision. The results were discussed in terms of fitting the complexity of the students to the supervision approach in selecting students for counseling programs.This paper was presented at the International Round Table for the Advancement of Counselling, Thessaloniki, Greece, April 1980, and was based partly on the senior author's doctoral disser tation (University of Maine, 1978).     

A New Marketing Paradigm for Electronic Commerce

The World Wide Web possesses unique characteristics that distinguish it in important ways from traditional commercial communications environments. Because the Web presents a fundamentally different environment for marketing activities than traditional media, conventional marketing activities are becoming transformed, as they are often difficult to implement in their present form. In this article, we discuss the idea that these changes portend an evolution in the 'marketing concept' and argue that in order for marketing efforts to be successful in this new medium, a new business paradigm is required. In this new approach, the marketing function must be reconstructed to facilitate electronic commerce in the emerging electronic society underlying the Web.     

West German science policy since the early 1960's: trends and objectives

The trends in West German science policy since the early 1960' are analyzed and compared to other industrially advanced countries. Government expenditures on research and development (R & D) are compared in their totality and also with regard to specific objectives such as defence, civil space, civil nuclear, general advancement of science, mining and manufacturing, agriculture, economic and social services.The trend of total government expenditure on R & D in West Germany iss characterized by a growth rate higher than in many other countries, such as the USA, the UK, France, Japan and the Netherlands. Also in each of the single objectives of government R & D, West German expenditure as a rule grew faster than in these countries. Among the different objectives, “general advancement of science” is given highest priority in West Germany, whereas the military sector is relatively small. In both trends and priorities, West Germany is more similar to Japan and the Netherlands than to the USA, the UK and France.The author discusses motives and intentions which may have affected these trends. He argues that West German science policy cannot be understood as a response to immediate economic problems, such as labour shortage or an alleged lag in technological progress in West German industry. In the early sixties West German science policy was still determined by efforts to catch up in certain technological fields from which West Germany had been excluded up to 1955 by allies' restrictions. In the late sixties, concern focussed on West Germany's long-term technological competitiveness in general.     

Rat serum electrolytes, lipid profile and cardiovascular activity onNauclea latifolia leaf extract administration

Aqueous extract of the leaf and root ofNauclea latifolia Sm. (Rubiaceae) is used in Nigerian folk medicine for the treatment of hypertension. This work is carried out to investigate the effect ofNauclea latifolia leaf extract on lipid profile and cardiovascular activity of rats. Normal and 10% coconut oil fed rats were treated with the water-soluble fraction of the ethanol extract ofNauclea latifolia leaf for 2 weeks. Forty-eight mature male albino rats of the Wistar strain were divided into two experiments of four groups, each group having 6 animals. Experiment I animals were treated with the water-soluble fraction of the ethanol extract whilst experiment II animals were fed 10% coconut oil meal before treatment with the water-soluble fraction of the ethanol extract. A single oral dose ofNauclea latifolia was 170, 340 and 510 mg/kg body wt/day of the extracts respectively for 2 wks. There was no significant change in the lipid profile of the experimental animals as compared with the controls. There was about 40% relaxation on contracted thoracic aorta that was pre-contracted with 2 μM phenylephrine. The viability of the tissue was tested against 10 μM of acetylcholine. There was no significant (P>0.05) change in Na⁺ concentration in the serum. However, the K⁺ concentration in the serum of the experimental animals showed a significant increase. The study shows that ethanol extract ofNauclea latifolia has vasodilator action on the aorta and that lipid profiles of experimental rats were not affected. Furthermore, the increase in the K⁺ may be contributing to the vasodilator effect ofNauclea latifolia.     

Conceptualizing Teachers' Ways of Knowing

This article addresses issues related to the ways teachers learn mathematics and the teaching of mathematics and the relevance of those ways to their professional development. Preservice teachers' understanding of school mathematics lacks sophistication, a situation that needs to be addressed in mathematics teacher education programs. What is critical is the means by which they encounter and explore the mathematics they will be teaching. Fundamentally, their mathematical experiences need to be congruous with the kind of teaching we would expect of a reflective, adaptive teacher. The article contains both practical and theoretical considerations of how these experiences might be structured. Theoretical orientations for conceptualizing teachers' belief structures are offered as a foundation for conceptualizing teachers' ways of knowing. The moral dimension of teacher education is considered as a backdrop for understanding how teachers come to know.This revised version was published online in September 2005 with corrections to the Cover Date.     

Differential inhibition and stimulus generalization cannot account for value transfer in simultaneous discrimination learning by pigeons: Reply to Aitken

Aitken (1999) argues that, in a simultaneous discrimination, reports of the transfer of value from the positive to the negative stimulus can be more readily explained in terms of an artifact produced by the procedure in which differential inhibition accrues to the negative test stimuli during training, together with stimulus generalization (similarity between the positive and negative stimuli). We argue that (1) there is little evidence for differential inhibition, and it often occurs in the wrong direction; (2) value transfer can be demonstrated when differential value is established to the positive stimuli afterdiscrimination training, when differential inhibition is not likely to be a factor; and (3) on both logical and empirical grounds, stimulus similarity does not provide an adequate account of the transfer of value from the positive to the negative stimulus (i.e., the strongest evidence for value transfer occurs when there is least stimulus similarity). We propose that value transfer occurs whenever there is relatively little experience with the negative stimuli. However, when there is extended experience with the negative stimuli, contrast will be found.     

Within-event learning contributes to value transfer in simultaneous instrumental discriminations by pigeons

Following simultaneous discrimination training with pigeons, in which responding to the S−was reinforced on half of the trials and responding to the S− was never reinforced, we examined the effect on the S− of presenting the S− by itself and the effect on the S+ of presenting the S− by itself (relative to an S− or an S− for which there had been no single-stimulus presentations). For Group A−, responding to the S− presented by itself was always reinforced, whereas for Group A−, such responding was extinguished. For Group B−, responding to the S− presented by itself was always reinforced, whereas for Group B+, responding was extinguished. Although both Group A+ and Group A−tended to avoid their associated S− (relative to a control S−), Group A+ avoided its associated S− less than did Group A−. In contrast, although for Group B−, presentation of the S− alone increased the pigeons’ preference for its associated S−(relative to a control S+), for Group B−, presentation of the S−alone had little effect on its preference for its associated S+. These results suggest that presentation of one stimulus from a simultaneous discrimination has two independent and sometimes opposite effects on the other discriminative stimulus. First, it reduces the strength of within-event conditioning between the S+ and the S−, and second, if the value of the singly presented stimulus has increased, some of its newly acquired value will transfer retroactively to the stimulus with which it was originally paired.