Cause and causality in daycare research: An investigation of group differences in Swedish child care

One of the most important goals of child care research has been to determine whether or not nonparental care has adverse effects on child development. Answering this question involves making causal attributions about the origins of differences between groups of children who have experienced divergent nonparental care arrangements. Some of the problems researchers face when trying to demonstrate causal relationships are illustrated in this paper using data from the Göteborg Child Care Study, a comprehensive, prospective, longitudinal study comparing the developmental trajectories of children in exclusive home care, family daycare, and center daycare. It is argued that the discovery of significant differences between groups must initiate extensive efforts to validate and interpret the findings. Focusing on the specific characteristics of prospective longitudinal studies, the article shows what measures can be taken to avoid the misinterpretation of group differences that are actually attributable to pre-selection effects or confounding variables. By rigorously identifying such confounds, researchers can accumulate support for hypothesized causal relationships, but they cannot ‘prove’ them because unknown and unmeasured confounding variables may always have important effects.     

Effects of age and delay on the amount of information provided by alleged sex abuse victims in investigative interviews

A total of 145 children of 4 to 5, 6 to 7, 8 to 9, and 10 to 12 years of age were interviewed within 3 days, 1 month, 1 to 3 months, or 5 to 14 months after allegedly experiencing a single incident of sexual abuse. The proportion of substantive investigative utterances eliciting new details from the children increased with age and decreased after delays of more than 1 month. Age (but not delay) was also associated with the length and richness of informative responses to individual investigative utterances of all types. Children were more likely to provide new details in response to option-posing and suggestive prompts. As in previous field studies, interviewers employed few open-ended prompts, and thus only 5% of the information obtained was elicited using free-recall prompts.     

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.