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Using a teaching-learning sequence (TLS), based on a physical model, to develop students' understanding of self-assembly
Linköping University, Department of Social and Welfare Studies, Learning, Aesthetics, Natural science. Linköping University, Faculty of Educational Sciences.
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology. (Visual learning and communication)ORCID iD: 0000-0003-1032-2145
School of Biochemistry, Genetics and Microbiology, University of KwaZulu-Natal, Pietermaritzburg, South Africa. (Science Education Research Group (SERG))
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-4694-5611
2011 (English)In: Authenticity in Biology Education: Benefits and Challenges / [ed] Yarden, A & Carvalho, G. S., Braga, Portugal: CIEC, Universidade do Minho , 2011, 67-77 p.Conference paper, Published paper (Other academic)
Abstract [en]

Self-assembly is a biological process in which free subunits combine to form molecular complexes. Despite being considered one of the ‘big ideas’ in molecular life sciences, only limited education research has been performed on this topic. The objectives of this study were to investigate students’ learning of self-assembly in an authentic learning environment: a teaching-learning sequence (TLS). Twenty third-year biochemistry students in South Africa participated in the study. The TLS included a tutorial exercise with a physical model of a poliovirus capsid. A mixed-methods approach was employed to collect qualitative and quantitative data from interviews and written pre- and post-tests. A significant improvement in test scores was found, and it was observed that the TLS could support students’ understanding of self-assembly. Some conceptual and visualization difficulties were also identified. Using the model in a TLS was associated with positive attitudes and engagement among the participants.

Place, publisher, year, edition, pages
Braga, Portugal: CIEC, Universidade do Minho , 2011. 67-77 p.
Keyword [en]
external representation, interactive learning, post-secondary education, learning difficulties, molecular interactions
National Category
Didactics
Identifiers
URN: urn:nbn:se:liu:diva-75234ISBN: 978-972-8952-19-8 (print)OAI: oai:DiVA.org:liu-75234DiVA: diva2:505019
Conference
VIIIth Conference of European Researchers in Didactics of Biology (ERIDOB), 13-17 July, 2010, Braga, Portugal
Projects
VisMolLS
Available from: 2012-02-22 Created: 2012-02-22 Last updated: 2016-05-04Bibliographically approved
In thesis
1. Experiencing Molecular Processes: The Role of Representations for Students' Conceptual Understanding
Open this publication in new window or tab >>Experiencing Molecular Processes: The Role of Representations for Students' Conceptual Understanding
2013 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Knowledge of molecular processes is crucial for fundamental understanding of the world and diverse technological applications. However, they cannot be clearly related to any directly experienced phenomena and may be very different from our intuitive expectations. Thus, representations are essential conceptual tools for making molecular processes understandable, but to be truly useful educational tools it is essential to ensure that students grasp the connections between what they represent and the represented phenomena. This challenge and associated personal and social aspects of learning were key themes of my doctoral research.

This thesis evaluates whether (and if so how) representations can support students’ conceptual understanding of molecular processes and thus successfully substitute the missing experience of these processes. The subject matter used to explore these issues included two crucial molecular processes in biochemical systems: self-assembly and adenosine triphosphate synthesis. The discussion is based on results presented in four appended papers. Both qualitative and quantitative research strategies have been applied, using instruments such as pre- and post-tests, group discussions and interviews. The samples consisted of Swedish and South African university students, who in the group discussions interacted with peers and external representations, including an image, a tangible model and an animation.

The findings indicate that students’ ability to discern relevant model features is critical for their ability to transfer prior conceptual knowledge from related situations. They also show that students’ use of metaphors and conceptual understanding depend on how an external representation conveys relevant aspects of the learning content (its design). Thus, students must manage two complex interpretation processes (interpreting the external representations and metaphors used), which may create challenges for their learning. Furthermore, the self-assembly process was shown to incorporate counter-intuitive aspects, and both group discussion and the tangible model proved to be important facilitators for changing students’ conceptual understanding of the process. Providing students with experiences of phenomena associated with molecular concepts that incorporate counter-intuitive aspects through representations is a key factor for their understanding of the concepts. In addition, providing students with a conflict-based task, problem or representation is not enough, they also have to be willing (emotionally motivated) to solve the conflict.

The challenge for educators lies in choosing representations that convey aspects of the learning content they are intended to teach and assist students in their meaning-making of the representations by remaining informed of students’ background knowledge and interpretations. Results presented in this thesis show that it could be advantageous to interpret learning in a broader sense.

Abstract [sv]

Kunskap om molekylära processer är avgörande för att skapa en grundläggande förståelse av världen och olika tekniska tillämpningar. Däremot kan molekylära processer inte alltid relateras till direkt erfarna fenomen och de kan skilja sig mycket från våra intuitiva förväntningar. Således blir representationer viktiga konceptuella verktyg för att göra molekylära processer begripliga. För att representationer skall vara användbara pedagogiska verktyg är det viktigt att eleverna förstår sambanden mellan vad de representerar och de representerade fenomenen. Denna utmaning och tillhörande personliga och sociala aspekter av lärande var centrala teman i mitt doktorsarbete.

Denna avhandling undersöker om (och i så fall hur) representationer kan stödja elevernas konceptuella förståelse av molekylära processer och därmed utgöra deras erfarenhet av dessa processer. Det ämnesinnehåll som används för att utforska dessa frågor är två viktiga molekylära processer i biokemiska system: självorganisering (self-assembly) och adenosintrifosfat syntes. Diskussionen bygger på resultat som presenteras i fyra bifogade artiklar. Både kvalitativa och kvantitativa forskningsstrategier har tillämpats, med instrument som före- och efter-tester, gruppdiskussioner och intervjuer. Urvalet bestod av svenska och sydafrikanska universitetsstudenter som i gruppdiskussioner interagerat med varandra och med olika externa representationer, såsom en bild, en konkret modell och en animation.

Resultaten tyder på att studenternas förmåga att urskilja relevanta aspekter hos en representation är avgörande för deras förmåga att överföra tidigare kunskaper från likartade situationer. Resultaten visar också att studenterna metaforiska språk och konceptuella förståelse beror på hur den externa representationen förmedlar relevanta aspekter av lärandeinnehållet (dess design). Därmed måste studenterna hantera två komplexa tolkningsprocesser (tolka de externa representationer och de metaforer som används), vilket kan skapa utmaningar för lärandet. Dessutom innehöll den molekylära processen self-assembly kontra-intuitiva aspekter och både gruppdiskussionerna och den konkreta modellen visade sig spela en viktig roll för att förändra elevernas konceptuella förståelse av processen. Att erbjuda studenter en direkt upplevelse av kontraintuitiva molekylära processer genom externa representationer är en avgörande faktor för deras förståelse av dessa fenomen. Att ge studenter en konflikt-baserad uppgift och en representation räcker dock inte, de måste också vara villiga (känslomässigt motiverad) att lösa konflikten.

Utmaningen för lärare ligger i att välja representationer som förmedlar delar av ämnesinnehållet som de är avser att undervisa och hjälpa elevernas meningsskapande av representationerna genom att hålla sig uppdaterade kring elevernas förkunskaper och tolkningar. Det resultat som presenteras i den här avhandlingen visar att det kan vara fördelaktigt att tolka lärande i naturvetenskap i en vidare bemärkelse.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2013. 137 p.
Series
Studies in Science and Technology Education, ISSN 1652-5051 ; 66
National Category
Didactics
Identifiers
urn:nbn:se:liu:diva-91371 (URN)978-91-7519-607-7 (ISBN)
Public defence
2013-06-05, K2, Kåkenhus, Campus Norrköping, Linköpings universitet, Norrköping, 13:00 (English)
Opponent
Supervisors
Available from: 2013-04-30 Created: 2013-04-23 Last updated: 2016-05-04Bibliographically approved

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Larsson, CarolineHöst, Gunnar E.Tibell, Lena

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