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A Primary Study on Students’ Constructing Physical & Physics Models in Context of Learning with Black-box Experiments

Author: RenWenJun
Tutor: LuoXingKai
School: Guangxi Normal University
Course: Curriculum and Pedagogy
Keywords: Black box experiment Model Modeling capabilities Mental model Physical model Complementary model Incompatible model
CLC: G633.7
Type: Master's thesis
Year: 2010
Downloads: 119
Quote: 3
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Abstract

Construct a physical model refers to the individual through the establishment of a mental model of characterization of external things used to explain and predict things and phenomena observed after interaction with the evidence to establish the process in line with the models and theories of the physical world (Johnson-Laird, 1989). Models and modeling is an important part of scientific inquiry, how to carry out modeling teaching has become an important issue in science education research. Research students in the context of black-box experiments how to construct a physical model, modeling environment for teachers to create, to carry out exploration activities, students of modeling capabilities, improve students' scientific literacy is important. In this study, modeling theory, the use of black-box experiments as a tool, test check of 36 students in grades seven, eight semi-structured interviews, trying to understand the students in the experimental context construct processes and characteristics of the physical model, including research students observed phenomenon and characterize the mental model the relationship between the level of modeling capabilities, and how to deal with the distinct models, as well as the performance of the model to solve the problem of application efficiency. The research task is divided into five stages, namely model selection, model building, model of efficiency, model, model scheduling. In this study, the evaluation based on Hempel's \empirical observation, interpretation of the rules, the theoretical system of three levels, each level and then broken down to the students reached level model to determine the student's modeling capabilities. The study found that in the model selection and set-up phase, the whole, the ability level of the students construct a mental model and the observed phenomena related to the richness of the students to face the phenomenon of the rich, the characterization of the level of mental models will be more high. At this stage, seven, most of the eighth grader last performance modeling capability has reached theoretical system level, which reached the level of interactions (41.7%), reaching the level of the extended relationship (33.3%) students to achieve scientific theory level, only 5.3% of the students in the empirical observation level, the level of 10.5% of the students in the interpretation of the rules. Boys and girls in all aspects of the performance were improved, but the girls in the face of the same material as the experimental phenomenon modeling level of growth faster than boys, and boys in the face of different phenomena experimental material modeling capabilities of apparent better than girls. Way to change the mental model and found that students tend to retain the original model component, in addition to, or in replacement of some of the components in the model. The student's mental model has several characteristics: First, the process of constructing the former concept. Has generated. Third, a Conservative, not easy to change. Fourth, the non-authenticity, and physical models there is a gap. In model Validity phase, the face of the complementary model have fully agree, agree and supplementary explanation, hesitant to be observed evidence and conclusions three changes, 84.6% of subjects in the face of a complementary model choose to accept or to be re-explained. Performance test in the face of incompatible model is to ignore incompatible models, refused incompatible model, re-interpret, peripheral theory change, theory of change five cases, only the total was 38.9% of the people to change the original models, including change of 19.4% is achieved through the peripheral theory change. From the students to face the situation of two dissimilar changes in the model, the students are more easily accepted and complemented the theoretical and difficult to accept incompatible models and model. Positive analysis and prediction - experiment \In the adoption of the prediction - experiment, the original the incompatible model still holds the wrong mental model of the subjects in the face, 60% of students come to the correct physical model by model changes. In the model application stage, the students showed the modeling power and stage performance compared to the overall level of decline. Level 3 (22.2%) and level 4 (25.0%), the proportion of students and nearly half of the total (36.1%) showed the proportion of students of level 2, level 1 only 16.7% of students. Scheduling stage in the model, the students in the new context abstract the physical model of performance to be improved. Finally, the interview program design and data analysis with a reflection and in accordance with the results of the study, the characteristics of the students' mental models from black-box experiments on the role of modeling, based on modeling the characteristics of teaching and other aspects of science education Teaching provides some reference observations.

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