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1.
The problem addressed by this study is that first-year college chemistry students learn little of the conceptual material associated with chemistry experiments they perform. The thesis of this research is that the construction of prelab and postlab concept maps help students understand the concepts involved in the experiments they perform. The study was conducted using 32 non–science majors enrolled in a first-year chemistry course. The experimental group constructed prelab and postlab concept maps, while the control group wrote essays explaining the conceptual chemistry of the four experiments used in this study. Both groups took 25-item achievement tests 1 week after each experiment. Prelab and postlab concept maps were scored and evaluated for significant differences. Five students were interviewed to investigate their perceptions regarding the usefulness of concept maps in chemistry laboratories. No significant differences were found between treatment groups with respect to students' conceptual understanding as determined by the multiple choice achievement tests. Students responded very positively toward the use of concepts maps in the laboratory. They felt strongly that constructing prelab and postlab concept maps helped them understand the conceptual chemistry of the experiments. © 1998 John Wiley & Sons, Inc. J Res Sci Teach 35: 1015–1029, 1998 相似文献
2.
Jan Wilson 《Research in Science Education》1996,26(2):169-185
The purpose of this study was to examine relationships between structural characteristics of students' concept maps about
chemical equilibrium and independent measures of their achievement in chemistry. Fifty students in 1991 and seventy students
in 1992 completed a concept-mapping task using twenty-four specified concepts. Using similarities in concept map structure,
based on the presence or absence of linked pairs of concepts, non-metric multidimensional scaling (MDS) was used to plot the
location of the concept maps in coordinate space. The distribution of maps was based on differences in their structure, but
also reflected levels of student achievement on independent tests. The relationship between the coordinate location of each
student's maps and his or her test scores on independent chemistry achievement tests was sought by canonical correlation analysis
of the 1991 data set. This revealed significant relationships between the MDS coordinates and test scores of recall of knowledge
and its application. Multiple regression analysis of sixty-one students' maps from the 1992 data set against their percentile
rank scores on a national chemistry quiz revealed significant relationships. The results are interpreted as revealing structural
differences in conceptual organisation about chemical equilibrium among students with different levels of achievement and
thus relative expertise in the domain. The significant relationship between map structure and cognitive process scores in
chemistry also supports the view that the organisation of declarative knowledge influences its accessibility in cognitive
tasks. 相似文献
3.
Janice M. Wilson 《科学教学研究杂志》1994,31(10):1133-1147
This study examined variation in the organization of domain-specific knowledge by 50 Year-12 chemistry students and 4 chemistry teachers. The study used nonmetric multidimensional scaling (MDS) and the Pathfinder network-generating algorithm to investigate individual and group differences in student concepts maps about chemical equilibrium. MDS was used to represent the individual maps in two-dimensional space, based on the presence or absence of paired propositional links. The resulting separation between maps reflected degree of hierarchical structure, but also reflected independent measures of student achievement. Pathfinder was then used to produce semantic networks from pooled data from high and low achievement groups using proximity matrices derived from the frequencies of paired concepts. The network constructed from maps of higher achievers (coherence measure = 0.18, linked pairs = 294, and number of subjects = 32) showed greater coherence, more concordance in specific paired links, more important specific conceptual relationships, and greater hierarchical organization than did the network constructed from maps of lower achievers (coherence measure = 0.12, linked pairs = 552, and number of subjects = 22). These differences are interpreted in terms of qualitative variation in knowledge organization by two groups of individuals with different levels of relative expertise (as reflected in achievement scores) concerning the topic of chemical equilibrium. The results suggest that the technique of transforming paired links in concept maps into proximity matrices for input to multivariate analyses provides a suitable methodology for comparing and documenting changes in the organization and structure of conceptual knowledge within and between individual students. 相似文献
4.
Sevgi Aydin Nurdane Aydemir Yezdan Boz Ayla Cetin-Dindar Oktay Bektas 《Journal of Science Education and Technology》2009,18(6):518-534
The present study aimed to evaluate whether a chemistry laboratory course called “Laboratory Experiments in Science Education”
based on constructivist instruction accompanied with concept mapping enhanced pre-service chemistry teachers’ conceptual understanding.
Data were collected from five pre-service chemistry teachers at a university in Ankara by means of a concept test and semi-structured
interviews. Results showed that pre-service teachers had some alternative conceptions about chemistry topics. Moreover, using
constructivist instruction accompanied with concept maps as an instructional tool was effective to promote conceptual understanding.
Participants thought that concept maps were useful especially in recognizing the relation between different chemistry concepts. 相似文献
5.
Joel Mintzes Heather J. Quinn 《International Journal of Science and Mathematics Education》2007,5(2):281-306
Emerging from a human constructivist view of learning and a punctuated model of conceptual change, these studies explored
differences in the structural complexity and content validity of knowledge about prehistoric life depicted in concept maps
by learners ranging in age from approximately 10 to 20 years. Study 1 (cross-age) explored the frequencies of concepts, relationships,
levels of hierarchy, branching, and cross-links in concept maps drawn by students in grades 5, 8, 11, 13, and 14. The results
provide some support for a punctuated model of conceptual change. Study 2 (longitudinal) explored the same frequencies on
repeated occasions among students enrolled in a college course on prehistoric life, and documented the shift in frequencies
of “novice” and “expert” concepts occurring during the semester. The results suggest that college students engage in much
restructuring of their knowledge frameworks during the period of a semester. Together, the two studies raise questions about
common classroom practices that encourage the rote learning of biology and geology concepts at all levels. 相似文献
6.
Dr Janice M. Wilson 《Research in Science Education》1990,20(1):292-299
The long term aim of this study is to document changes in the nature and level of conceptual understanding revealed by a cohort
of undergraduate nursing students. The outcome of such a study may be used in future review and redesign processes by curriculum
planners. Conceptual understanding of physiology and pharmacology, areas which are central to nursing studies depends, in
turn, on an understanding of certain chemical concepts. This paper describes the group cognitive structure of 60 first year
preservice nursing students, with respect to 21 basic chemistry concepts. Group cognitive structure is represented by non-metric
multidimensional scaling of data obtained from individual concept maps prepared by students. The impact of prior studies in
chemistry on the level of understanding revealed is discussed.
Specializations: Cognition and science education, behavioural ecology and ethology. 相似文献
7.
Osman Nafiz Kaya 《Research in Science Education》2008,38(1):91-110
Although researchers in higher education propose alternatives to traditional approaches to assessment, traditional methods
are commonly used in college or university science courses. The purpose of this study was to explore the feasibility and validity
of Prospective Science Teachers’ (PSTs) concept maps as authentic assessment tools in a student-centred approach to describe
the changes in the conceptual understanding of the PSTs in general chemistry laboratory investigations. After the PSTs (n = 47) decided on important issues, such as who would assess their concept maps and what scoring strategy and criteria would
be used, they practiced assessing their own and peers’ concept maps during the first five laboratory investigations. They
subsequently constructed and assessed pre- and post-laboratory concept maps in a student-centred approach consisting of self,
peer, and instructor assessments for the five remaining laboratory investigations. The results of the study showed using pre-
and post-laboratory concept maps as authentic assessment tools in a student-centred approach was valid and reliable for describing
the conceptual understanding of the PSTs in a university general chemistry laboratory course. The results of individual interviews
indicated most PSTs had positive views of their assessment practices in the laboratory course. This study also provides pedagogical
implications for the training of science teachers. 相似文献
8.
This study explored and documented the frequencies of conceptual difficulties confronted by college students seeking to understand the basic processes of cellular respiration. Using concept maps, clinical interviews and an open-ended instrument, viewpoints were elicited from 100 (novice) introductory biology students before and after relevant instruction in cellular respiration and from 100 (experienced) students enrolled in advanced biology courses. Chi-square analyses revealed significant differences among groups in the frequencies of scientifically acceptable and alternative conceptions. The findings suggest that novices harbor a wide range of conceptual difficulties that constrain their understanding of cellular respiration. Furthermore, many of these difficulties persist after instruction and new ones arise. Often these conceptual problems remain intact among experienced students despite well-planned, repeated instruction at advanced levels. 相似文献
9.
INVESTIGATING THE EFFECTIVENESS OF AN ANALOGY ACTIVITY IN IMPROVING STUDENTS’ CONCEPTUAL CHANGE FOR SOLUTION CHEMISTRY CONCEPTS 总被引：1，自引：0，他引：1
Muammer Çalik Alipaşa Ayas Richard K. Coll 《International Journal of Science and Mathematics Education》2009,7(4):651-676
This paper reports on an investigation on the use of an analogy activity and seeks to provide evidence of whether the activity
enables students to change alternative conceptions towards views more in accord with scientific views for aspects of solution
chemistry. We were also interested in how robust any change was and whether these changes in conceptual thinking became embedded
in the students’ long-term memory. The study has its theoretical basis in an interpretive paradigm, and used multiple methods
to probe the issues in depth. Data collection consisted of two concept test items, one-on-one interviews, and student self-assessment.
The sample consisted of 44 Grade 9 students selected from two intact classes (22 each), from Trabzon, Turkey. The interviews
were conducted with six students selected because of evidence as to their significant conceptual change in solution chemistry.
The research findings revealed statistically significant differences in pre-test and post-test scores, and pre-test and delayed
post-test scores (p<0.05), but no differences between post-test and delayed test scores (p>0.05). This suggests that the analogy activity is helpful in enhancing students’ conceptual understanding of solution chemistry,
and that these changes may be stored in the students’ long-term memory. 相似文献
10.
11.
Concept maps consist of nodes that represent concepts and links that represent relationships between concepts. Various studies
have shown that concept mapping fosters meaningful learning. However, little is known about the specific cognitive processes
that are responsible for such mapping effects. In a thinking-aloud study, we analyzed the relations between cognitive processes
during concept mapping as well as the characteristics of the concept maps that the learners produced and learning outcomes
(38 university students). To test whether differences in learning outcome are due to differences in general abilities, verbal
and spatial abilities were also assessed. In a cluster-analysis two types of ineffective learners were identified: ‘non-labeling
mappers’ and ‘non-planning mappers’. Effective learners, in contrast, showed much effort in planning their mapping process
and constructing a coherent concept map. These strategies were more evident in students with prior concept-mapping experience
(‘advanced beginners’) than in those who had not used this learning strategy before (‘successful beginners’). Based on the
present findings, suggestions for a direct training approach (i.e., strategy training with worked-out examples) and an indirect
training approach (i.e., supporting the learners with strategy prompts) were developed. 相似文献
12.
Haluk Özmen GÖkhan DemİrcİoĞlu Richard K. Coll 《International Journal of Science and Mathematics Education》2009,7(1):1-24
The research reported here consists of the introduction of an intervention based on a series of laboratory activities combined
with concept mapping. The purpose of this intervention was to enhance student understanding of acid-base chemistry for tenth
grade students’ from two classes in a Turkish high school. An additional aim was to enhance student attitude toward chemistry.
In the research design, two cohorts of students were compared; those from the intervention group (N = 31) and a second group
(N = 28) who were taught in a more traditional manner. Student understanding of acid-base chemistry was evaluated with a pretest/posttest
research design using a purpose-designed instrument, the Concept Achievement Test (CAT) consisting of 25 items, 15 multiple choice and ten multiple choice with explanation. Alternative conceptions identified
in the pretest were incorporated into the intervention, which thereby sought to move students toward views more in accord
with scientific views for the concepts. Statistical tests indicate the instrument is reliable (with an alpha reliability of
0.81) and the analysis of the findings revealed statistically significant differences between the intervention and traditional
groups with respect to conceptual understanding. Examination of student explanations and analyses of semi-structured interviews
conducted with selected students suggest that the main influence was the laboratory activities. Analysis of the findings in
the context of relevant literature that concept mapping in conjunction with laboratory activities is more enjoyable, helps
student link concepts, and reduces their alternative conceptions. 相似文献
13.
Sue Ashley Harmen Schaap Elly de Bruijn 《Assessment & Evaluation in Higher Education》2017,42(5):690-704
This study aims to identify an adequate approach for revealing conceptual understanding in higher professional education. Revealing students’ conceptual understanding is an important step towards developing effective curricula, assessment and aligned teaching strategies to enhance conceptual understanding in higher education. Essays and concept maps were used to determine how students’ conceptual understanding of international business can be revealed adequately. To this end, 132 international business students in higher professional education were randomly assigned to four conditions to write essays and to construct concept maps about an international business research topic. The conditions were: essay alone, essay after concept map, concept map alone, and concept map after essay. An assessment rubric was used to assess the breadth and depth of students’ conceptual understanding. Results show essays are the most adequate approach for revealing conceptual understanding of international business. In particular, concept maps revealed fewer facts and less reasoning than essays. Essays written after concept maps were less effective than essays, possibly since students perceived these essays as redundant. Further research is suggested on how educators can foster conceptual understanding. 相似文献
14.
Concept mapping has been used effectively to represent understanding of afield of knowledge. The maps are highly individualistic and idiosyncratic. Three high‐performing junior college students, three average performing junior college students and two university physics teachers constructed maps using 22 electricity concepts. In this study several previously used and newly developed measures were applied to the maps in an attempt to gain further insight into differences in the quality of understanding of the three groups. It was found that the concept maps constructed by high performing students differed from those of average performing students and closely resembled the concept maps of physics experts, especially when the quality of the links between concepts was taken into account. 相似文献
15.
Noel Gough 《Cultural Studies of Science Education》2011,6(1):113-125
In this essay I explore a number of questions about purposes and methods in science education research prompted by my reading
of Wesley Pitts’ ethnographic study of interactions among four students and their teacher in a chemistry classroom in the
Bronx, New York City. I commence three ‘lines of flight’ (small acts of Deleuzo-Guattarian deterritorialization) that depart
from the conceptual territory regulated by science education’s dominant systems of signification and make new connections
within and beyond that territory. I offer neither a comprehensive review nor a thorough critique of Wesley’s paper but, rather,
suggest some alternative directions for science education research in the genre he exemplifies. 相似文献
16.
We investigated how different levels of information presented by various technologies affected secondary students' understanding of acid, base, and pH concepts. Secondary students who were selected for the study had just completed their study of acid–base chemistry. No attempt was made to provide further instruction. We analyzed changes in the understanding of individual students by constructing concept maps from the propositions that the students used in interviews conducted before and after a series of acid–base titrations. After the initial interview, students were divided into three groups. Within each group, students individually performed the same set of titrations using different technologies: chemical indicators, pH meters, and microcomputer-based laboratories (MBL). After the titrations were completed, all students were interviewed again. We found that students using MBL exhibited a larger positive shift in their concept map scores, which indicates a greater differentiation and integration of their knowledge of acids and bases. The chemical indicator students exhibited a more moderate positive shift in their concept map scores, and the pH meter students exhibited a smaller positive shift. We also found that the MBL students constructed more inappropriate links in their concept maps than the chemical indicator or pH meter students. However, we speculate that this increased number of inappropriate links indicates a high level of involvement with the technology. We therefore argue that the level of information offered by the technology affected students' understanding of the chemical concepts. 相似文献
17.
This study sought further evidence of the concurrent validity of concept mapping as a research and evaluation tool in science education. Specifically, the study examined the extent to which differences exist in the concept maps of advanced college biology majors (N = 25) and beginning nonmajors (N = 25) in the domain of mammals. Furthermore, it explored whether these differences are reflected in the way subjects assign class membership as revealed in a card sorting task. The results indicate that concept maps of biology majors are structurally more complex than those of nonmajors and that differences in the structural complexity and organizational patterns depicted in concept maps are reflected in the underlying dimensions used to assign class membership. Together, these findings suggest that the concept map provides a theoretically powerful and psychometrically sound tool for assessing conceptual change in experimental and classroom settings. 相似文献
18.
Bayram Co&#;tu 《Journal of Science Education and Technology》2007,16(5):379-386
The purpose of this study was to determine whether there were significant differences in students’ performances amongst conceptual,
algorithmic and graphical questions tests. Seventy-one eleventh-grade students were involved in this study. In order to assess
students’ performance, conceptual, graphical and algorithmic questions tests were utilized. Students’ performances in each
test were analyzed statistically. Statistical analysis using one-way ANOVA of student tests scores pointed to statistically
significant differences amongst each of three test scores (P < 0.05) in favor of the conceptual test. Further analyses were conducted to compare one type of questions with others. From
these comparisons, positive relationships were found between conceptual understanding and algorithmic understanding and between
conceptual understanding and graphical understanding. Also, results obtained indicated that most of the students lack of graphical
understanding. The results suggest that students need more training about graphical understanding. 相似文献
19.
Despite its importance as a central goal in environmental education, there appears to be little consensus about how best to document, assess and evaluate understanding of environmental concepts. This illustrative case study describes and demonstrates the use of the concept mapping strategy as an effective tool for assessing environmental understanding. Data were collected from 325 middle school‐aged (11–14 years) individuals and comparisons were made among those enrolled in a model, university‐based, informal, residential marine education program (viz. MarineQuest) and a matched group of non‐participating students. Using a non‐randomized Solomon Four Group experimental design, differences in the structural complexity and content validity of knowledge about marine animal life were explored. Results reveal significant differences in the frequencies of concepts, relationships, levels of hierarchy, branching and cross‐linking and in the frequencies and types of critical concepts depicted. In all cases, where differences were found, they favored participants who enrolled in the environmental education intervention. The findings suggest that concept maps offer a valuable alternative or adjunct to traditional pencil and paper tests and provide both a qualitative and a quantitative measure of conceptual understanding. 相似文献
20.
Allan Jeong Woon Jee Lee 《Educational technology research and development : ETR & D》2012,60(2):325-340
This study examined some of the methodological approaches used by students to construct causal maps in order to determine
which approaches help students understand the underlying causes and causal mechanisms in a complex system. This study tested
the relationship between causal understanding (ratio of root causes correctly/incorrectly identified, number of correctly
identified root-cause links explaining how root causes directly/indirectly impact final outcomes) and three attributes observed
in students’ causal maps (total links, temporal flow, lateral position of final outcome) that students produced before and
after online discussions on noted similarities and differences between students’ causal maps. The findings suggest that: (a)
causal understanding can be adversely affected if students are instructed before group discussion to temporally sequence nodes to flow from left to right and to
position the outcome node farther away from the left edge of the map relative to other nodes in the map; (b) causal understanding
following group discussion can be increased by instructing students to minimize the number of causal links and create a map with temporally flow; (c) promoting temporal
flow following discussion may be the most effective means of helping students to identify root causes; and (d) instructing
students to minimize the number of links following discussion may be the most effective means to helping students explain
root causes directly/indirectly impact outcomes. These findings provide insights on what processes and constraints can be
formalized and integrated into causal mapping software when used as an instructional and assessment tool. 相似文献