There seems to be some initial evidence that team captains are selected based on non-leadership factors such as team tenure, technical abilities, being the daughter of the club president, or playing position. This is concerning since players expect their ideal team captain to have superior motivational and social skills. Adding to this literature on captain selection, the present study investigates relationships between the reasons for which team captains are selected and their perceived leadership quality; and perceived acceptance. To accomplish this, (...) we recruited 450 coaches and 198 players from Flemish football and volleyball teams. Participants evaluated 41 reasons on the extent to which they played a role in the selection of their team captain. Additionally, participants rated their team captain’s leadership quality and level of acceptance. The results consistently indicated that captains who were selected for having good motivational and social competencies were given higher ratings on perceived leadership quality and acceptance by participants. In conclusion, athletes who are motivated, good at motivating others and have superior social skills tend to be better suited for captaincy than those selected based on non-leadership factors. (shrink)

This article provides, for the first time, an overview of all images (drawings and prints) sent by the Dutch microscopist Antoni van Leeuwenhoek (1632–1723) to the Royal Society during their fifty-year long correspondence. Analyses of the images and close reading of the letters have led to an identification of three periods in which Leeuwenhoek worked together with artists. The first period (1673–1689) is characterized by the work of several draughtsmen as well as Leeuwenhoek’s own improving attempts to depict his observations. (...) In the second period (1692–1712) Leeuwenhoek worked together with one unknown draughtsman, while the work in the third period (1713–1723) can now be attributed to the young draughtsman Willem vander Wilt. This article also shows how Leeuwenhoek did not only rely on draughtsmen for the depiction of his own observations, but rather, how he worked together with them in his workshop to observe, confirm, and witness microscopic experiments, replicating the collaborative working methods of the Royal Society in Delft. (shrink)

This essay discusses three authors from the early seventeenth century (Galileo, Descartes, and Van Helmont) and the reasons that guided their decisions to write occasionally in their respective vernacular languages even though Latin remained the accepted language for learned communication. From their writings we can see that their choices were social, political, and always of high importance. The choice of language of these multilingual authors conveyed a message that was sometimes implicit, sometimes explicit. Their usage of both Latin and vernacular (...) proved, on the one hand, their place in the international learned community and, on the other hand, their interest and investment in changing the educational system. (shrink)

Hebbian cell-assembly theory and attractor networks are good starting points for modeling cortical processing. Detailed cell models can be useful in understanding the dynamics of attractor networks. Cell assemblies are likely to be distributed, with the cortical column as the local processing unit. Synaptic memory may be dominant in all but the first couple of seconds.