The application of the microgenetic method to studies of learning in science education: characteristics of published studies,methodological issues and recommendations for future research

This paper examines the role of the microgenetic method in science education. The microgenetic method is a technique for exploring the progression of learning in detail through repeated, high-frequency observations of a learner’s ‘performance’ in some activity. Existing microgenetic studies in science education are analysed. This leads to an examination of five significant methodological issues in microgenetic research. Firstly, qualitative and/or quantitative approaches to data collection and analysis within the microgenetic approach are considered and a case is made for the appropriateness of qualitative microgenetic research. Secondly, it is argued that researchers may define static intervals, periods within which (for methodological purposes) change is assumed not to occur, when reporting microgenetic studies. Thirdly, researchers should consider providing justifications for their choice of sampling rate with reference to the rate of change of the phenomenon they are studying. Fourthly, the difficulty of distinguishing conceptual change from the existence of multiple understandings is highlighted. Finally, the nature of sequences of repeated measures in microgenetic studies is considered. It is argued that different methodological approaches are suitable for microgenetic studies of different phenomena and a list of guidelines for the use of the microgenetic method in small-scale, qualitatively analysed studies in science education is proposed.     

Behavioral inhibition induced by ingestion in sea anemones (Anthopleura elegantissima)

Following tests for initial responsiveness, the suppressive effect of ingestion ofArtemia salina on the contraction response of the sea anemone,Anthopleura elegantissima, was assessed. During testing, repeated presentations of a water-stream stimulus occurred over a period of 70 min. All subjects also underwent control testing in which the water-stream sequence was presented in the absence of priorArtemia ingestion. Significant suppression of oral disk contraction to the water stream was observed followingArtemia ingestion with and without water exchange during testing. The relationship of this finding to similar results obtained withHydra is discussed.     

Developing communities of practice within and outside higher education institutions

Higher education institutions (HEIs) are largely built on the assumption that learning is an individual process best encouraged by explicit teaching that is, on the whole, separated from social engagement with those outside the university community. This perspective has been theoretically challenged by those who argue for a social constructivist learning theory and a more collaborative approach to learning. Information and communication technologies (ICTs) afford lecturers and students an opportunity for extending the boundaries of a learning experience, not merely beyond the lone individual, but beyond the limits of discipline boundaries within a specific university community and beyond the institution into the local community. This paper illustrates how a collaborative effort between lecturers and students from the Computer Science and Education Departments at Rhodes University, teachers from the local community, the provincial Department of Education and a non-governmental organisation developed into an unfolding virtual and physical community of practice which enabled ICT take-up in a number of schools in the Grahamstown District, South Africa. This discussion of what has become known as the e-Yethu project provides an example of how ICTs, underpinned by the insights of social constructivism, the notion of 'community of practice' and in particular Hoadley and Kilner's C4P Framework for Communities of Practice, can serve to help HEIs understand ways in which ICTs can provide opportunities for developing collaborative learning within HEIs, and between the HEI and the local community.