Within their review of conceptual change, Duit (2003) takes time to discuss the desire for countries to create a scientifically literate society. Within this debate Duit (2003) states that pressure was put on teachers to perform better and some scholars began to question educational research because much of the scholarly work being done at the time was taking place in labs, not classrooms, where there are many variables at play which cannot be conveniently controlled for. Conceptual change is the response to not only the need for an even more efficient way to help students become scientifically literate, but also a response of educational research to stay relevant in the process of improving teaching and learning in science classrooms.
Unlike Skinner (1954), where learning was defined as “performing” (p. 89) a behavior(s) that is continually reinforced by rewarding correct behavior, conceptual change acknowledges that students bring ideas with them and, “…learning is the result of the interaction between what the student is taught and his current ideas or conceptions” (Posner, Kenneth, Hewson, & Gertzog, 1982, p. 211). This position is radically different from the ideas of Skinner (1954) because conceptual change deals with entities that cannot be seen by visible observation rather than easily identifiable behaviors associated with Skinner’s (1954) conception of learning.
Posner et al. (1982) outline two main types of conceptual change, assimilation and accommodation. While assimilation is relevant to the discussion, it is accommodation that will help meet the goal of creating an educational system that produces scientifically literate individuals efficiently. I say this not to be flippant about assimilation, but simply acquiring a new idea and integrating into an established set of concepts to deal with new phenomena is significantly more straightforward; accommodation is the process by which students replace and reorganize their initial set of concepts. In order to provide opportunities to cause accommodation, Posner et al. (1982) suggest four main criteria: students need to believe less radical changes won’t work, the new idea must be understood by the student, the new idea needs to be possible in the student’s view, and the idea must be useful to them. Each of these criteria are worth investigating in their own right and raise many questions about what teaching should look like in order to create situations to promote accommodation, however other scholars have suggested that there is more to creating an accommodation than the above factors (Duit, 2003; Tyson, Venville, Harrison, & Treagust, 1997)
Understanding there are a lot of factors that determine whether an accommodation occurs, there is no way to guarantee a student will reorganize their ideas. Additionally, given the complicated nature of an accommodation, how do we know when a “representation” (Posner et al., 1982, p. 216) meets a desired outcome or is in fact, an accommodation? There are two main ways to evaluate this: Duit (2003) states conceptual change, “…is not necessarily an exchange of conceptions for another but rather an increased use of the kind of conception that makes better sense to the student” (p. 677) or are we as educators striving to produce less “naïve” explanations of concepts by revising and changing ideas of students as suggested by the authors of Taking Science to School? While each of these positions may seem similar, they are different because of how the end result is evaluated. For example, if one believes conceptual change should be used to help students “make sense of new theories” (Posner et al., 1982), no matter what they state at the end of a course, as long as it is more aligned to a scientific explanation, that student can be deemed more scientifically literate. However, if one thinks students need to have their ideas revised and changed, this implies significant changes conceptually. Consequently, both would then be evaluated and assessed differently.
Beyond the assessment question however, there is a question of whether we should engage in science teaching with the goal of causing very intentional changes in students’ thinking. I say this not to belittle the importance of science, but to draw attention to one of the stated problems in producing accommodation; what practices should teachers engage in to create an environment and situations where students can in fact have the chance for accommodation over time? As stated by Posner et al. (1982), accommodations can be “strenuous and potentially threatening” (p. 223). Therefore, environments designed to produce conceptual changes should take this fact into consideration. Given students could encounter “cognitive conflict” (Posner et al., 1982, p. 224), are teachers prepared to facilitate students navigating this experience? Also, what kind of cognitive conflict do students experience? Knowing some of the conflicts that may arise are social/affective (Duit, 2003; Tyson et al, 1997), should teachers continue to push for an accommodation when these ideas may be the barrier to the change? Yes, students are capable of holding two ideas as true in varied context, but teachers need to be prepared to support them in navigating these instances. This is also true with discovering practices to help with a number of other factors influencing conceptual change.
Conceptual change, while having powerful explanatory implications, is a theory of learning. It is however, not necessarily a set of clearly laid out practices that promote efficient increases in scientific literacy. In fact, conceptual change may not be the theory that produces efficient schooling because if we are designing experiences for students to reorganize their thoughts in science, this process may be slow due to the multitude of conceptions a person holds. Additionally, what do we define as being “scientifically literate?” The Framework is a step in that direction, but as Posner et al. (1982) suggests, “…should this be an expectation for all students, or only for certain groups, such as science majors?” This is not to say that we should hold certain students to higher standards or not engage students in every standard outlined in the NGSS, but it is a question for deciding what the ultimate goals of science educators are. When is a students’ barriers to accommodation worthy of being left alone? Is it the job of science educators to teach science through multiple potential epistemologies (Ladson-Billings, 2000; Sánchez Tapia, Krajcik, & Reiser, 2018)? What practices allow science to be responsive to any and all barriers to accommodation? I think science education is the best it has ever been and Ambitious Science Teaching is definitely a gigantic step in continuing this trend because it involves models, metacognition, and leveraging students ideas (Windschitl, Thompson, Braaten, & Stroupe, 2012), however there is still work to be done.
References:
Duit, R. (2003). Conceptual change: a powerful framework for improving science teaching and learning. International Journal of Science Education, 25(6), 671–688. https://doi.org/10.1080/0950069032000076652
Ladson-Billings, G. (2000). Racialized discourses and ethnic epistemologies. In N. Denzin & L. Yvonna (Eds.), Handbook of Qualitative Research (pp. 257–277). Thousand Oaks: Sage Publications.
National Research Council. (2012). A Framework for K-12 Science Education. https://doi.org/10.17226/13165
Posner, G. J., Kenneth, S. A., Hewson, P. W., & Gertzog, W. A. (1982). Accomodation of a scientific conception: Toward a theory of conceptual change. Science Education, 66(2), 211–227. https://doi.org/10.1017/CBO9781107415324.004
Sánchez Tapia, I., Krajcik, J., & Reiser, B. (2018). “We do not know what is the real story anymore ”: Curricular contextualization principles that support indigenous students in understanding natural selection. Journal of Research in Science Teaching, 55(3), 348–376. https://doi.org/10.1002/tea.21422
Skinner, B.F. (1954). The Science of Learning and the Art of Teaching. In A.A.
Lumsdaine & Glasser (Eds.), Teaching Machines and Programmed Learning: The Science of Learning (pp.99-113): National Association for the Education of Young Children.
Tyson, L. M., Venville, G. J., Harrison, A. G., & Treagust, D. F. (1997). A multidimensional framework for interpreting conceptual change events in the classroom. Science Education, 81(4), 387–404. https://doi.org/10.1002/(SICI)1098-237X(199707)81:4<387::AID-SCE2>3.0.CO;2-8
Windschitl, M., Thompson, J., Braaten, M., & Stroupe, D. (2012). Proposing a core set of instructional practices and tools for teachers of science. Science Education, 96(5), 878–903. https://doi.org/10.1002/sce.21027