From activity to gestures and scientific language

Abstract: Gestures may provide the long sought‐for bridge between science laboratory experiences and scientific discourse about abstract entities. In this article, we present our results of analyzing students' gestures and scientific discourse by supporting three assertions about the relationship between laboratory experiences, gestures, and scientific discourse: (1) gestures arise from the experiences in the phenomenal world, most frequently express scientific content before students master discourse, and allow students to construct complex explanations by lowering the cognitive load; (2) gestures provide a medium on which the development of scientific discourse can piggyback; and (3) gestures provide the material that “glues” layers of perceptually accessible entities and abstract concepts. Our work has important implications for laboratory experiments which students should attempt to explain while still in the lab rather than afterwards and away from the materials. © 2000 John Wiley & Sons, Inc. J Res Sci Teach 38: 103–136, 2001     

External knowledge sourcing in biotechnology through acquisition versus alliance: A KBV approach

Knowledge sourcing is important for firms, especially in fast-paced industries. However, few studies explore the effects of knowledge-based predictors on the comparative choice of employing acquisitions versus alliances for sourcing external knowledge. This study extends the limited existing research on this topic. It simultaneously examines the effects of knowledge domain attributes, seeker and source experience-based knowledge, and dyad knowledge similarity and digestibility on whether a firm chooses an acquisition or alliance when sourcing external knowledge. Data is comprised of 209 research-driven acquisitions and alliances of biotechnology firms based in North America. Our findings reveal that external knowledge sourcing through acquisition is more likely when the knowledge domain is more complex and valuable. Acquisition is also preferred when the seeker has greater acquisition experience and when the source has accumulated a moderate level of alliance experience. Alliance, in contrast, is the chosen mode for accessing external knowledge when the knowledge is high in specificity and when the seeker has prior alliance experience. In addition, increasing similarity and digestibility of the dyad's knowledge bases strengthen the relationship between knowledge value and the probability of acquisition versus alliance. These results extend understanding of how firms decide to augment their knowledge resources in a knowledge-intensive industry. They also demonstrate that a multilevel KBV approach emphasizing knowledge characteristics uncovers important predictors of strategy and structure in research-driven organizations.     

Knowing,researching, and reporting science education: Lessons from science and technology studies

Recent research in science and technology studies changed the way we understand science as it is practiced—that is, how scientific knowledge emerges from social, natural, social, political, cultural, historical, and economic contingencies of scientific work. Many science educators agree that students should learn not only science but also about science. In this article, we (a) outline important findings, research methods, and ways of reporting research that emerged from science and technology studies; and (b) show how familiarity with science and technology studies research can provide science educators with valuable insights about curriculum design and research on learning. We conclude that science and technology studies can serve as a resource to science education and that there is a potential for conducting collaborative work between science education and science and technology studies. Such collaborations have the potential to yield better theories about how people become competent in science from childhood to adulthood. © 1998 John Wiley & Sons, Inc. J Res Sci Teach 35: 213–235, 1998.     

Does training make a difference to quality in family child care?

The purpose of this study was to determine which family child care providers seek training, which providers drop out of training, and the effects of training on the quality of care offered by providers. One-hundred thirty family child care providers in three communities who enrolled in Family-to-Family training participated in the study. A comparison group consisted of 112 regulated providers in those same communities who were not involved in the training program under investigation. Each provider was observed for 3 hrs, was interviewed, and completed questionnaires. Providers in training were observed prior to training and 6 months afterwards. Results revealed that providers who sought training were very similar to typical regulated providers. Providers who dropped out of training were less experienced and used fewer business and safety practices than providers who completed it. Training increased global quality in two out of three sites, but did not affect process quality. Of 95 providers, 18 made observable (as opposed to statistically significant) improvements in quality following training, and 9 decreased in quality. These data are interpreted with respect to family child care training policies and practices.     

Authentic science experiences as a vehicle to change students’ orientations toward science and scientific career choices: Learning from the path followed by Brad

Bringing a greater number of students into science is one of, if not the most fundamental goals of science education for all, especially for heretofore-neglected groups of society such as women and Aboriginal students. Providing students with opportunities to experience how science really is enacted—i.e., authentic science—has been advocated as an important means to allow students to know and learn about science. The purpose of this paper is to problematize how “authentic” science experiences may mediate students’ orientations towards science and scientific career choices. Based on a larger ethnographic study, we present the case of an Aboriginal student who engaged in a scientific internship program. We draw on cultural–historical activity theory to understand the intersection between science as practice and the mundane practices in which students participate as part of their daily lives. Following Brad, we articulate our understanding of the ways in which he hybridized the various mundane and scientific practices that intersected in and through his participation and by which he realized his cultural identity as an Aboriginal. Mediated by this hybridization, we observe changes in his orientation towards science and his career choices. We use this case study to revisit methodological implications for understanding the role of “authentic science experiences” in science education.

On the number of terms used in automatic query expansion

This paper investigates the number of expansion terms to use in automatic query expansion by examining the behavior of eight retrieval systems participating in the NRRC Reliable Information Access Workshop. The results demonstrate that current systems are able to obtain nearly all of the benefit of using a fixed number of expansion terms per topic, but significant additional improvement is possible if systems were able to accurately select the best number of expansion terms on a per topic basis. When optimizing average effectiveness as measured by mean average precision, using a fixed number of terms increases the score a large amount for a small number of topics but has little effect for most topics. The analysis further suggests that when a topic is helped by automatic feedback, the increase is from a set of terms that reinforce each other rather than from the system finding a single excellent term.     

Natural pedagogical conversations in high school students' internship

Many science educators encourage student experiences of “authentic” science by means of student participation in science‐related workplaces. Little research has been done, however, to investigate how “teaching” naturally occurs in such settings, where scientists or technicians normally do not have pedagogical training and generally do not have time (or value) receiving such training. This study examines how laboratory members without a pedagogical background or experience in teaching engage high school students during their internship activities. Drawing on conversation analysis, we analyze the minute‐by‐minute transactions that occurred while high school students participated in a leading environmental science laboratory. We find that the participation trajectory was based on demonstration‐practice‐connect (D‐P‐C) phases that continually recurred in the process of “doing” science. Concerning the transactional structures, we identify two basic conversation patterns—Initiate‐Clarify‐Reply (I‐C‐R) and Initiate‐Reply‐Clarify‐Reply (I‐R‐C‐R)—that do not only differ from the well‐known Initiate‐Reply‐Evaluate (I‐R‐E) patterns previously observed in science classrooms, but also could be combined to constitute more complex patterns. With respect to the organization of natural pedagogical conversations, we find that there were not only of preferred and dispreferred modes of responding but also ambiguous dispreferred modes; and the formulating organization not only includes self‐formulating but also other‐formulating. These natural pedagogical conversations helped, on the one hand, students to clarify their understanding and, on the other hand, technicians (or teachers) to teach toward different needs for different students in different contexts. © 2009 Wiley Periodicals, Inc. J Res Sci Teach 46: 481–505, 2009     

Theorizing scientific literacy in the wild

The purpose of this review paper is to contribute to the effort of rethinking scientific literacy in a form that is appropriate for describing and theorizing its occurrence “in the wild,” that is, in the everyday world that we share with others (as opposed to testing situations in classrooms and laboratories). Consistent with our commitment to practice, we exemplify relevant theories of everyday cognition with a case study of scientific literacy in the wild. Accordingly, we conceive scientific literacy as situated, distributed, and dynamic. We use this case study as a touchstone for reviewing the literature on scientific literacy as it has been developed over the past 50 years. Our review shows that sociocultural and cultural-historical activity theoretic models of knowing account for scientific literacy in the wild better than other theories. If the purpose of science education is to produce a scientifically literate citizenry, the question now can be asked what these models propose to frame school science and the possible trajectories that might lead to scientific literacy in the wild.     

Engaging young children in collective curriculum design

In this study we investigate how 5-year-old children in Brazil and their teachers collectively design science curriculum. More specifically, we develop an agency|structure dialectic as a framework to describe this collective praxis in which science curriculum may emerge as the result of children–teacher transactions rather than as a result of being predetermined and controlled by the latter. We draw on a cultural-historical approach and on the theory of structure and agency to analyze the events showing the complexity of the activity inside a classroom of very young children by science education standards. Data were collected in the context of a science unit in an early-childhood education program in Belo Horizonte. Our study suggests that (a) throughout the movement of agency|passivity || schema|resources one can observe participative thinking, a form of collective consciousness that arises in and from lived experience; (b) learning is a process in which a group is invested in searching for solutions while they create schemas and rearrange resources to evolve a new structure; and (c) the emergent curriculum is a powerful form of praxis that develops children’s participation from early childhood on.