Common sense answers in physics

Research in Science Education -     

Common sense: A form of teacher knowledge

This essay discusses an analytic construct - common sense knowledge - that might be helpful in empirical studies of teacher knowledge. I suggest that we consider whether teacher talk is common sense knowledge, in the sense that Geertz defines the term, and that if it is, that we take it seriously on its own terms and in context, rather than trying to 'fix' it.     

Making sense of genetics: Students' knowledge use during problem solving in a high school genetics class

Interest in including ideas about the nature of science in instruction and research has led to the realization that, in addition to developing courses which offer students experience with science practice, it is important to understand the ways in which students learn and use science knowledge within such courses. The study reported here is based on a particular view of the nature of scientific practice: Science is collaborative; scientists use knowledge in the construction of new knowledge; and scientists' understanding of problems and problem-solving strategies change during knowledge construction. Given this perspective, the study examines the ways in which students in an innovative high school genetics class collaborate to construct knowledge as they develop genetics models. In this classroom, students use three kinds of knowledge: knowledge of genetics, permitting them to recognize anomalous aspects of new data and providing a template from which to develop new models; knowledge of the process of model revision, helping them make decisions about how to develop new models; and knowledge of their own problem-solving strategies, allowing them to “keep track” of what they have done, as well as make connections between the development of new models and their knowledge of genetics. © 1996 John Wiley & Sons, Inc.     

Interaction of intuitive physics with computer-simulated physics

How do children solve force and motion problems in computer simulations without explicit knowledge of the underlying physics? This question was addressed by saving the keystroke input of 19 sixth-grade children in computer memory as each interacted with a simulated, frictionless object using Logo turtle-graphics. The keystroke sequences were first used to determine subject performance on the gamelike features of the simulation. A second analysis used the Newtonian structure of the program to investigate alternative methods for controlling turtle velocity. Five boys and five girls were interviewed during the simulation concerning the perceived relationship between keyboard input and turtle behavior. Subjects who could clearly state some keyboard effects did not score high on either computer analysis, yet achieved the most general solutions of the computer problem. They did so by exploring turtle behavior under a greater variety of conditions than the subjects who achieved partial solutions. For the successful subjects, the turtle was related by analogy to useful information from existing conceptions of motion.     

Peer collaboration in solving qualitative physics problems: The role of collaborative talk

This study investigated whether and how peer collaboration facilitated students' problem solving in physics. A qualitative physics test was administered to two Secondary 6 (Year 12) classes, with half of the students in each class randomly assigned to take the test individually and the other half to work in dyads. The abilities of the individuals and dyads were matched such that there was no significant difference between their physics examination grades. The test results show that the dyads performed better than the individuals on each problem and the test as a whole. The rich collaborative talk of the dyads shows that peer collaboration provided students with experiences of co-construction and conflict that were conducive to successful problem solving. However, it was found that co-construction could lead to correct as well as wrong solutions and that conflict and co-construction could occur in the same instance rather than as separate activities. The study also found that students' success in problem solving depended not so much on their ability but on how they interacted and whether and how they invoked the relevant physics principles and strategies.     

Causal attribution by sensing and intuitive types during diagnostic problem solving

Attempts by sensing and intuitive types to diagnose a malfunctioning industrial system by operating a computer-based data bank were compared in terms of (1) the extent of their causal attributions, and (2) their use of different information-gathering control operations. As predicted by Jungian type theory, intuitives made significantly more causal attributions to factors lying behind the immediately perceived malfunction (P<0.03). There were no significant differences between the two types' use of control operations. The implications of these findings for attribution theory, the theory of diagnostic error, and for the education of diagnosticians are discussed.     

Impact of authenticity on sense making in word problem solving

The study presented in this paper seeks to investigate the impact of authenticity on the students’ disposition to make necessary real world considerations in their word problem solving. The aim is also to gather information about the extent to which different reasons for the students’ behaviors are responsible for not providing solutions that are consistent with the ‘real’ situations described in the word problems. The study includes both written solutions to word problems and interview data from 161 5th graders. The results show an impact of authenticity on both the presence of ‘real life’ considerations in the solution process and on the proportion of written solutions that were really affected by these considerations. The students’ frequent use of superficial solution strategies and their beliefs about mathematical word problem solving were found to be the main reasons for providing solutions that are inconsistent with the situations described in the word problems.     

The role of epistemic emotions in mathematics problem solving

The purpose of this research was to examine the antecedents and consequences of epistemic and activity emotions in the context of complex mathematics problem solving. Seventy-nine elementary students from the fifth grade participated. Students self-reported their perceptions of control and value specific to mathematics problem solving, and were given a complex mathematics problem to solve over a period of several days. At specific time intervals during problem solving, students reported their epistemic and activity emotions. To capture self-regulatory processes, students thought out loud as they solved the problem. Path analyses revealed that both perceived control and value served as important antecedents to the epistemic and activity emotions students experienced during problem solving. Epistemic and activity emotions also predicted the types of processing strategies students used across three phases of self-regulated learning during problem solving. Finally, shallow and deep processing cognitive and metacognitive strategies positively predicted problem-solving performance. Theoretical and educational implications are discussed.     

Differences in the problem solving of stronger and weaker novices in physics: Knowledge,strategies, or knowledge structure?

This study investigates the extent to which differences in the problem-solving performance of stronger and weaker novices in physics arise from: (a) differences in amount of domain knowledge, (b) differences in how domain knowledge is organized, and (c) differences in the strategic application of domain knowledge. Ten first-year university physics students attempted to solve one easy and one difficult problem involving Newton's second law. Clear differences in the protocols of stronger and weaker students for the difficult problem, combined with successful performance by all students on the easy problem, were interpreted as evidence for differences in the organization of relevant knowledge held by more versus less successful first-year physics students. Some differences in procedural knowledge were also observed, but all students used the working forward strategy that had been presented to them in lectures.     

Mathematics knowledge for understanding and problem solving

Two important aspects of transfer in mathematics learning are the application of mathematical knowledge to problem solving and the acquisition of more advanced concepts, both in mathematics and in other domains. This paper discusses general assumptions and themes of current cognitive research on mathematics learning, focusing on issues of the understanding thought to facilitate transfer of mathematical knowledge. Two studies illustrating these themes are presented, one concerning students' understanding of numerical relationships involved in basic addition and subtraction combinations, the other dealing with students' understanding of algebraic expressions and transformations. Implications of these cognitive perspectives for instruction are discussed.     

法治与良知

健全的良各是真正的法治能够顺利地良性运作的社会心理基础法治的昌明要求社会活动主体形成与法治的精神实质相一致的,基于法律并以地法律的中卢诚为核心的法治良知。法治的推行必须以个人,社会和国家（政府）这些基本的社会活动主体具备起码的良知为前提条件与人格保障。     

The role of strategy-based motivation in mathematical problem solving: The case of learner-generated drawings

This study investigated the role of strategy-based motivation (SBM) in solving real-world geometry problems. Students from 19 classes (N = 437) were assigned to the strategy training or control condition. Before the treatment, students were asked about their SBM (i.e., self-efficacy, cost, and value). After the treatment, they were instructed to generate drawings and solve problems. The results revealed that self-efficacy expectations and cost (but not value) regarding the drawing strategy predicted drawing quality and performance. The relation between SBM and performance was mediated by drawing quality. SBM did not moderate the effects of strategy training on drawing quality or performance. The results emphasize the importance of SBM in the context of strategy training for predicting the quality of strategy use and problem-solving performance. The results are consistent with assumptions of expectancy-value and learner-generated drawing theories. One practical implication is that attention should be given to SBM in mathematics lessons.     

The role of model building in problem solving and conceptual change

This study examines the effects of the activity of building systems models for school-based problems on problem solving and on conceptual change in elementary science classes. During a unit on the water cycle in an Asian elementary school, students constructed systems models of the water cycle. We found that representing ill-structured problems as system models improves problem solving as well as creating beneficial conceptual change related to the topic.     

Junior high school physics: Using a qualitative strategy for successful problem solving

Students at the junior high school (JHS) level often cannot use their knowledge of physics for explaining and predicting phenomena. We claim that this difficulty stems from the fact that explanations are multi‐step reasoning tasks, and students often lack the qualitative problem‐solving strategies needed to guide them. This article describes a new instructional approach for teaching mechanics at the JHS level that explicitly teaches such a strategy. The strategy involves easy to use visual representations and leads from characterizing the system in terms of interactions to the design of free‐body force diagrams. These diagrams are used for explaining and predicting phenomena based on Newton's laws. The findings show that 9th grade students who studied by the approach advanced significantly from pretests to post‐tests on items of the Force Concept Inventory—FCI and on other items examining specific basic and complex understanding performances. These items focused on the major learning goals of the program. In the post‐tests the JHS students performed on the FCI items better than advanced high‐school and college students. In addition, interviews conducted before, during, and after instruction indicated that the students had an improved ability to explain and predict phenomena using physics ideas and that they showed retention after 6 months. © 2010 Wiley Periodicals, Inc. J Res Sci Teach 47: 1094–1115, 2010     

Ecological knowledge: Acquisition and use in problem solving and in decision making

Ecological knowledge is analyzed under psychological and educational aspects. In empirical studies three experimental settings were used to investigate this type of knowledge: (1) a computer simulation of an ecological system, (2) an environmental game as a new variant of the Commons Dilemma, and (3) a computerized text base on various aspects of an actual environmental problem. The subjects had to acquire and to apply this knowledge in making predictions, planning intervention, deciding about environmental measures etc. The results show which conditions impair the acquisition and correct utilization of ecological knowledge and how it is possible to provide well-structured learning environments for this content domain.     

Inhibiting interference from prior knowledge: Arithmetic intrusions in algebra word problem solving

In Singapore, 6–12 year-old students are taught to solve algebra word problems with a mix of arithmetic and pre-algebraic strategies; 13–17 year-olds are typically encouraged to replace these strategies with letter-symbolic algebra. We examined whether algebra problem-solving proficiency amongst beginning learners of letter-symbolic algebra is correlated with the ability to inhibit intrusions from the earlier arithmetic strategies. Similar to typical school practice in Singapore, we asked 14 year-old students (N = 157) to use only letter-symbolic algebra to solve 9 algebra word problems. After having controlled for algebraic knowledge, working memory, and intelligence, better inhibitory ability still predicted fewer arithmetic intrusions and higher problem solving accuracy. Path analysis revealed 2 types of inhibition. Inhibition-of-reified-processes predicted accuracy through arithmetic intrusions. Inhibition-of-recently-learned-associations predicted accuracy through intelligence. Findings suggest establishing pedagogical links between arithmetic and algebraic methods may facilitate students' transition to letter-symbolic algebra.     

物理问题解决中的内隐知识的建构

通过教育使隐性知识能够从解决问题的高手传递给学生正受到关注，本文试图对物理问题解决的内隐知识的建构方法进行探讨。