Leseschwierigkeiten XIV. Internationaler Kongreβ für angewandte Psychologie Kopenhagen,August 1961

Ohne Zusammenfassung     

Chemotaxis and optimization

Chemotactic behavior of bacteria as reported by Delbrück, Adler and MacNab and Koshland is modelled as an optimization process. For equiconcentration surfaces that are concentric spheres the expected travel time from an initial point to the center is determined analytically. In addition, cylindrical equiconcentration surfaces are discussed. Refinements of the process to test various hypotheses about thresholds, tumbling and overshoot are also indicated.     

Development and Challenges of the Credit Point System in Dutch Higher Education

This article will focus on the credit point system and especially on the Dutch system. In many countries such a system has a long history, but in others it is a relatively new phenomenon. In the first section, the objectives of credit point systems will be introduced. In the second section the emergence and characteristics of the credit point system in the Netherlands will be presented. In the third section, some results of student behaviour in the first year in Higher education will be shown for different groups of students, such as how many credit points on average they earned and how many hours per week on average they studied. The findings demonstrate how empirical results from student behaviour, combined with the norms of the credit point system, can be used to evaluate the accountability of the academic programmes. In the last section, some challenges for the use of credit point systems in the nearby future will be discussed. Recently, one can see a rapid change from the traditional ways of testing to the assessment of competencies of students and student portfolios.