Frans Plooij
Franciscus Xaverius (Frans) Plooij (Schiedam, 1946) is a Dutch behavioral scientist and former professor by special appointment at the University of Groningen who became known through the book "The Wonder Weeks" which he wrote with his wife Hetty van de Rijt.[1]
Background
Plooij studied biology and psychology at the universities of Nijmegen and Amsterdam.[2] He was promoted [clarification needed] in 1980, after handing in his thesis on mother-baby interaction in domestic situations. [3]
Subsequently he became chair of the Research and Development Department at the Municipal Pedological Institute (Gemeentelijk Pedologisch Instituut) in Amsterdam (1981-1993),[4][5] where he participated in, among other projects, the SOCRATES-LINGUA project of the European Union, on the implementation of an innovative second- and foreign-language method for pre-school children. [6]
Regression period and chair
An important theory of Plooij was the occurrence of 'regression periods' or periods of decline in self-reliance, in which chimpanzee babies clung more to the mother chimp, and had an increased tendency to 'whimper' (a kind of wailing). This theory was also studied in humans, in which Plooij suggested in 1992 the theory that 10 regression periods occur in the first 20 months of life [7] and that these are related to higher disease frequencies. Later, in collaboration with Spanish colleagues, Plooij demonstrated that babies get a whole cluster of new skills after every regression period, although in this study the regression periods did not occur at predictable, delineable intervals. Plooij held a chair in Groningen from 1993 to 1998 set up by the Foundation for Research on Psychosocial Stress (SOPS).
References
- ↑ Plooij op hoogleraren.ub.rug.nl
- ↑ Plooij, F. X. (1970). Getalbegrip bij een chimpansee. (Doctoraal Scriptie), Gemeente Universiteit Amsterdam, Amsterdam.
- ↑ Plooij, F. X. (1980). The behavioural development of free-living chimpanzee babies and infants. (Ph.D.), University of Groningen, The Netherlands.
- ↑ Letiche, H. K., van der Wolf, J. C., & Plooij, F. X. (Eds.). (1991). The practitioner's power of choice in staff-development and in-service training. Amsterdam/Lisse: Swets &n Zeitlinger.
- ↑ Plooij, F. X. (1985). The relationship between ethology and paedology. Netherlands Journal of Zoology, 35, 323-347.
- ↑ Uilenburg, N., Plooij, F. X., De Glopper, K., & Damhuis, R. (2001). Effects of a format-based second language teaching method in kindergarten. Applied Psycholinguistics, 22(1), 1-33. doi:undefined
- ↑ van de Rijt-Plooij, H., & Plooij, F. X. (1992). Infantile regressions: Disorganization and the onset of transition. Journal of Reproductive and Infant Psychology, 10, 129-149
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