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Features of Knowledge Building in Biology: Understanding Undergraduate Students' Ideas about Molecular Mechanisms.

ABSTRACT: Research has suggested that teaching and learning in molecular and cellular biology (MCB) is difficult. We used a new lens to understand undergraduate reasoning about molecular mechanisms: the knowledge-integration approach to conceptual change. Knowledge integration is the dynamic process by which learners acquire new ideas, develop connections between ideas, and reorganize and restructure prior knowledge. Semistructured, clinical think-aloud interviews were conducted with introductory and upper-division MCB students. Interviews included a written conceptual assessment, a concept-mapping activity, and an opportunity to explain the biomechanisms of DNA replication, transcription, and translation. Student reasoning patterns were explored through mixed-method analyses. Results suggested that students must sort mechanistic entities into appropriate mental categories that reflect the nature of MCB mechanisms and that conflation between these categories is common. We also showed how connections between molecular mechanisms and their biological roles are part of building an integrated knowledge network as students develop expertise. We observed differences in the nature of connections between ideas related to different forms of reasoning. Finally, we provide a tentative model for MCB knowledge integration and suggest its implications for undergraduate learning.

SUBMITTER: Southard K

PROVIDER: S-EPMC4803096 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:PurposeTo investigate the attitude of final-year dental students towards their paediatric dentistry training and their confidence in treating child patients.MethodsA 55-item questionnaire was distributed online and physically to the final-year BDSc (Hons) students at The University of Queensland (Australia). The questionnaire consisted of four parts including theoretical knowledge, clinical observational experience, preclinical training and clinical training in paediatric dentistry. Self-reported confidence was recorded using five-point Likert scale questions ranging from 'not confident at all' to 'completely confident', which were allocated the numbers 1-5, respectively. Jamovi and GraphPad Prism were used for data analysis and creation of graphs.ResultsA total of 47 students completed the questionnaire giving a response rate of 77%. Approximately two-thirds of participants had previous experience working with children and 70% had observed a practitioner providing paediatric dental treatment. The students reported the lowest level of clinical confidence for pulp therapy (M = 2.32; SD = 1.08). The clinical confidence in dental trauma management was also reported to be low (M = 2.50; SD = 1.15). The clinical administration of local anaesthetic (LA) had the highest level of confidence (M = 3.95; SD = 1.03). The students reported that they were highly confident in the theoretical knowledge of behaviour guidance techniques (M = 3.64; SD = 0.97) and preclinical training involving examination, treatment planning and preventative procedures (M = 4.33, SD = 0.67).ConclusionThis study showed that students reported low levels of confidence in pulp therapies and trauma management in children as compared to other aspects of paediatric dentistry. Students indicated the need for more preclinical and clinical training sessions, as well as more opportunities to perform a wider variety of treatments on paediatric patients.

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Features of Knowledge Building in Biology: Understanding Undergraduate Students' Ideas about Molecular Mechanisms.

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