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1.
Our main goal in this study was to explore whether the use of models in molecular genetics instruction in high school can contribute to students' understanding of concepts and processes in genetics. Three comparable groups of 11th and 12th graders participated: The control group (116 students) was taught in the traditional lecture format, while the others received instructions which integrated a bead model (71 students), or an illustration model (71 students). Similar instructions and the same guiding questions accompanied the two models. We used three instruments: a multiple‐choice and an open‐ended written questionnaire, as well as personal interviews. Five of the multiple‐choice questions were also given to students before receiving their genetics instruction (pretest). We found that students who used one of the two types of models improved their knowledge in molecular genetics compared to the control group. However, the open‐ended questions revealed that bead model activity was significantly more effective than illustration activity. On the basis of these findings we conclude that, though it is advisable to use a three‐dimensional model, such as the bead model, engaging students in activities with illustrations can still improve their achievement in comparison to traditional instruction. © 2006 Wiley Periodicals, Inc. J Res Sci Teach 43: 500–529, 2006  相似文献   

2.
Our main goal in this study was to determine whether the use of computer animation and illustration activities in high school can contribute to student achievement in molecular genetics. Three comparable groups of eleventh‐ and twelfth‐grade students participated: the control group (116 students) was taught in the traditional lecture format, whereas the experimental groups received instructions that integrated a computer animation (61 students) or illustration (71 students) activities. We used three research instruments: a multiple‐choice questionnaire; an open‐ended, written questionnaire; and personal interviews. Five of the multiple‐choice questions were also given to students before they received their genetics instruction (pretest). We found that students who participate in the experimental groups improved their knowledge in molecular genetics compared with the control group. However, the open‐ended questions revealed that the computer animation activity was significantly more effective than the illustration activity. On the basis of these findings, we conclude that it is advisable to use computer animations in molecular genetics, especially when teaching about dynamic processes; however, engaging students in illustration activities can still improve their achievement in comparison to traditional instruction. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 45: 273–292, 2008  相似文献   

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4.

This study was designed to investigate variations in students’ responses to lever problems across multiple assessment contexts and formats. Prior to and at the end of a four‐month science unit on simple machines, grade 6/7 students prepared semantic maps, wrote responses to application questions, discussed their written answers, and modelled solutions to practical problems using physical materials. We present data from pre‐ and post‐instruction interviews to show that students’ responses varied in kind and extent across assessment contexts and formats. Such variations in performance are consistent with situated cognition theories which assert that competence is heterogeneous across situations and is a function of interactions between individuals and the contexts in which they perform. Based on these findings, implications are drawn regarding more productive means of assessing students’ understanding in classrooms.  相似文献   

5.
Bloom's taxonomy was adopted to create a subject‐specific scoring tool for histology multiple‐choice questions (MCQs). This Bloom's Taxonomy Histology Tool (BTHT) was used to analyze teacher‐ and student‐generated quiz and examination questions from a graduate level histology course. Multiple‐choice questions using histological images were generally assigned a higher BTHT level than simple text questions. The type of microscopy technique (light or electron microscopy) used for these image‐based questions did not result in any significant differences in their Bloom's taxonomy scores. The BTHT levels for teacher‐generated MCQs correlated positively with higher discrimination indices and inversely with the percent of students answering these questions correctly (difficulty index), suggesting that higher‐level Bloom's taxonomy questions differentiate well between higher‐ and lower‐performing students. When examining BTHT scores for MCQs that were written by students in a Multiple‐Choice Item Development Assignment (MCIDA) there was no significant correlation between these scores and the students' ability to answer teacher‐generated MCQs. This suggests that the ability to answer histology MCQs relies on a different skill set than the aptitude to construct higher‐level Bloom's taxonomy questions. However, students significantly improved their average BTHT scores from the midterm to the final MCIDA task, which indicates that practice, experience and feedback increased their MCQ writing proficiency. Anat Sci Educ 10: 456–464. © 2017 American Association of Anatomists.  相似文献   

6.
Tuebingen's Sectio Chirurgica (TSC) is an innovative, interactive, multimedia, and transdisciplinary teaching method designed to complement dissection courses. The Tuebingen's Sectio Chirurgica (TSC) allows clinical anatomy to be taught via interactive live stream surgeries moderated by an anatomist. This method aims to provide an application‐oriented approach to teaching anatomy that offers students a deeper learning experience. A cohort study was devised to determine whether students who participated in the TSC were better able to solve clinical application questions than students who did not participate. A total of 365 students participated in the dissection course during the winter term of the 2012/2013 academic year. The final examination contained 40 standard multiple‐choice (S‐MC) and 20 clinically‐applied multiple‐choice (CA‐MC) items. The CA‐MC items referred to clinical cases but could be answered solely using anatomical knowledge. Students who regularly participated in the TSC answered the CA‐MC questions significantly better than the control group (75% and 65%, respectively; P < 0.05, Mann‐Whitney U test). The groups exhibited no differences on the S‐MC questions (85% and 82.5%, respectively; P > 0.05). The CA‐MC questions had a slightly higher level of difficulty than the S‐MC questions (0.725 and 0.801, respectively; P = 0.083). The discriminatory power of the items was comparable (S‐MC median Pearson correlations: 0.321; CA‐MC: 0.283). The TSC successfully teaches the clinical application of anatomical knowledge. Students who attended the TSC in addition to the dissection course were able to answer CA‐MC questions significantly better than students who did not attend the TSC. Thus, attending the TSC in addition to the dissection course supported students' clinical learning goals. Anat Sci Educ 10: 46–52. © 2016 American Association of Anatomists.  相似文献   

7.
The study reported in this paper examines the possibility that language confusion can be mistaken for misconception. A written test, consisting of 20 multiple choice items that had been used by other authors to diagnose misconceptions in physics was administered to a sample of matric level, English first language, South African students. A sub-sample of these subjects was then interviewed to explore the reasoning behind their choices in the written test. An analysis of the interviews showed that in several cases, distractors were chosen by subjects who did not hold the target misconceptions the items were intended to diagnose, and that language usage, for example misinterpretation of the question text, was frequently the reason behind the choices. The findings indicate that caution is needed in interpreting students' responses to multiple choice questions.  相似文献   

8.
In this study, we randomly assigned 69 Grade 4 students to a writing-to-learn treatment (n = 23), comparison (n = 23), or no-treatment control (n = 23). Treatment and comparison students completed a science experiment involving balance. During the experiment, treatment students wrote four short responses and an extended response to document their learning. To control for writing time, comparison students wrote four short responses and an extended response about topics other than balance. On a 20-item balance knowledge posttest, control outperformed treatment (d = 0.89) and comparison (d = 1.05) on the lowest level balance questions (Level 1). At the highest level questions, Levels 3 and 4, treatment (ds = 1.42 and 0.94) and comparison (ds = 1.62 and 1.37) outperformed control. There were no significant differences in total words written or level of balance understanding on a posttest written response. The performance of individual responders to treatment is also discussed.  相似文献   

9.

The aim of the study was to investigate students’ views of model evaluation through the lens of personal epistemology. We developed an integrated analytical framework by combining a developmental framework, including absolutist, multiplist, and evaluatist, with a multi-dimensional framework, including limits of knowing, certainty of knowing, and criteria of knowing. Furthermore, we examined the potential influence of the question contexts and the students’ grade levels. A total of 188 secondary school students were surveyed. Students answered two sets of model evaluation questions based on two scientific contexts. After reading the information about the two models, the students had to choose from three epistemic assumptions and then provide written justifications explaining their choice of assumptions. Quantitative and qualitative analyses were conducted for the multiple-choice questions and the written responses. In both contexts there were higher percentages of 11th-grade students choosing the evaluatist assumptions than the eighth-grade students. For students choosing multiplist and evaluatist assumptions, the 11th-grade students were more likely than the eighth-grade students to think in terms of pragmatic and evidential criteria as the criteria of knowing. Different contexts of the questions evoked different views of model evaluation particularly regarding the limits of knowing. Four additional categories of epistemic levels also emerged from the data. This study provides a new framework for understanding students’ thinking about model evaluation. Implications and suggestions for future research are provided.

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10.
Good sentence construction, the act of writing multiple words into sentence types that make semantic and syntactic sense, is needed for clear and meaningful written expression. The present study investigated the effects of a multi‐component writing intervention, sentence instruction and frequency building to a performance criterion, on the simple sentence construction of intermediate‐grade level students with high‐incidence disabilities. Four special education teachers delivered intervention to small groups of two students, a total of eight students, and assessed for retention. Overall results were positive but inconsistent across the small groups. Three of the four small groups improved their text writing within simple sentences during and following intervention, and moderate to large Tau‐U values for correct word sequences and for incorrect word sequences, respectively, were found. Results suggest that postinstruction writing fluency practice can be an effective part of writing intervention for intermediate‐grade level students with high‐incidence disabilities.  相似文献   

11.
External written examinations are commonly used for determining student academic achievement. The influence of question type and cognitive process on examination performance in senior-secondary physical education is unclear. A secondary data analysis of Victorian Certificate of Education (VCE) Physical Education examination data (2011; n?=?9,323, 2012; n?=?8,781) was conducted. Question type (multiple choice and short answer) and overall examination performance were compared and the predictive value of question type, cognitive process (based on Bloom’s revised taxonomy), and overall examination scores determined. In 2011 and 2012, students performed significantly better on multiple-choice questions; however, short-answer performance better predicted overall exam performance. A significant difference between marks achieved by cognitive level and grade (Ungraded [UG] – A+) was found. Low-achieving students (UG – D) were performing well below the examination mean across all questions. Developing higher order thinking skills for all students may lead to improved overall examination performance in VCE Physical Education.  相似文献   

12.
Teachers' Grading Practices: Meaning and Values   总被引：3，自引：0，他引：3  
Classroom teachers do not always follow recommended grading practices. Why not? It is possible to conceptualize this question as a validity issue and ask whether teachers' concerns over the many uses of grades outweigh concerns about the interpretation of grades. The purpose of this study was to investigate the meaning classroom teachers associate with grades, the value judgments they make when considering grades, and whether the meaning or values associated with grades differed by whether teachers had measurement instruction. A sample of 84 teachers, 40 with and 44 without measurement instruction, responded to classroom grading scenarios in two ways–with multiple-choice responses indicating what they would do and with written responses to the question, “Why did you make this choice?” A coding scheme based on Messick's (1989a, 1989b) progressive matrix of facets of validity was used for quantitative and qualitative analyses of written responses. The meaning of grades is closely related to the idea of student work; grades are pay students earn for activities they perform. The relationship of this notion to classroom management should be investigated. Teachers do make value judgments when assigning grades and are especially concerned about being fair. Teachers also are concerned about the consequences of grade use, especially for developing student self-esteem and good attitudes toward future school work. Measurement instruction made very little difference, although it did reduce the amount of self-referenced grading reported.  相似文献   

13.
This paper examines some of the ways gifted students are said to be different from non‐gifted students by comparing the responses of 475, 9‐year‐old “gifted” students with those of 230 average‐attaining 13‐year‐old students on the same mathematical problem‐solving questions. The questions were specifically written for mathematically gifted 9 year olds as part of the World Class Tests project. The performance and approaches used by students in the two samples were found to be very similar, as was the frequency of different responses to the questions, suggesting that many of the mathematically “gifted” are not qualitatively different in their problem‐solving approaches from students of average ability, but are merely precocious.  相似文献   

14.
Two well-accepted ideas among educators are (a) performance assessment is an effective means of assessing higher-order thinking skills and (b) data-driven instruction planning is a valuable tool for optimizing student learning. This article describes a locally developed performance task (LDPT) designed to measure critical thinking, problem solving, and written communication skills of elementary and middle school students in a large school district. An investigation was conducted to determine how middle school teachers use LDPT responses to inform instruction and to ascertain how students are reflecting on their performance. Results from an analysis of documents indicated teachers were engaged in formal data-informed practices within professional learning communities. Moreover, educators examined student work samples and planned instruction based on student-specific needs. Strategies to reinforce proficiency in the skills assessed by the district's LDPT are reported.  相似文献   

15.
The Anatomy Learning Experiences Questionnaire (ALEQ) was designed by Smith and Mathias to explore students' perceptions and experiences of learning anatomy. In this study, the psychometric properties of a slightly altered 34‐item ALEQ (ALEQ‐34) were evaluated, and correlations with learning outcomes investigated, by surveying first‐ and second‐year undergraduate medical students; 181 usable responses were obtained (75% response rate). Psychometric analysis demonstrated overall good reliability (Cronbach's alpha of 0.85). Exploratory factor analysis yielded a 27‐item, three‐factor solution (ALEQ‐27, Cronbach's alpha of 0.86), described as: (Factor 1) (Reversed) challenges in learning anatomy, (Factor 2) Applications and importance of anatomy, and (Factor 3) Learning in the dissection laboratory. Second‐year students had somewhat greater challenges and less positive attitudes in learning anatomy than first‐year students. Females reported slightly greater challenges and less confidence in learning anatomy than males. Total scores on summative gross anatomy examination questions correlated with ALEQ‐27, Pearson's r = 0.222 and 0.271, in years 1 and 2, respectively, and with Factor 1, r = 0.479 and 0.317 (all statistically significant). Factor 1 also had similar correlations across different question types (multiple choice; short answer or essay; cadaveric; and anatomical models, bones, or radiological images). In a retrospective analysis, Factor 1 predicted poor end‐of‐semester anatomy examination results in year 1 with a sensitivity of 88% and positive predictive value of 33%. Further development of ALEQ‐27 may enable deeper understanding of students' learning of anatomy, and its ten‐item Factor 1 may be a useful screening tool to identify at‐risk students. Anat Sci Educ 10: 514–527. © 2017 American Association of Anatomists.  相似文献   

16.
Recently, faculty at Pritzker School of Medicine, The University of Chicago, have made efforts to improve the depth of radiological anatomy knowledge that students have, but no insights exist as to student and resident opinions of how clinically helpful deep anatomical understanding is. A single‐institution survey of second‐ and fourth‐year medical students and postgraduate year 1–4 residents from 11 specialties, composed of five‐point Likert questions, sample examination questions, and narrative response questions, was distributed in 2015. One hundred seventy‐seven of the 466 potential respondents replied (71 residents and 106 students), response rate 38.0%. No nonresponse bias was present in two separate analyses. Respondents generally favored a superficial “identification” question as more relevant to clinical practice, which was positively associated with increasing clinical experience ρ = 0.357, P < 0.001 by point‐biserial correlation. Students and residents most commonly used self‐directed methods to learn medical imaging during their medical anatomy courses (72.6 and 57.7%, respectively). Small group education was least commonly used by students and residents (45.3 and 39.4%, respectively), but most commonly recommended (62.3 and 69%, respectively). A total of 56.6 and 64.8% of students and residents, respectively, reported that having multiple learning methods was “quite” or “extremely” important. Respondents with more clinical experience were more likely to report that a superficial identification question was more clinically relevant than a question testing deeper radiological anatomy knowledge. Small group learning was preferred among students and residents but was the least commonly employed method of instruction. Both findings contrast starkly with current radiological anatomy instructional understanding and practices. Anat Sci Educ 11: 25–31. © 2017 American Association of Anatomists.  相似文献   

17.
Untimed examinations are popular with students because there is a perception that first impressions may be incorrect, and that difficult questions require more time for reflection. In this report, we tested the hypothesis that timed anatomy practical examinations are inherently more difficult than untimed examinations. Students in the Doctor of Physical Therapy program at Thomas Jefferson University were assessed on their understanding of anatomic relationships using multiple‐choice questions. For the class of 2012 (n = 46), students were allowed to circulate freely among 40 testing stations during the 40‐minute testing session. For the class of 2013 (n = 46), students were required to move sequentially through the 40 testing stations (one minute per item). Students in both years were given three practical examinations covering the back/upper limb, lower limb, and trunk. An identical set of questions was used for both groups of students (untimed and timed examinations). Our results indicate that there is no significant difference between student performance on untimed and timed examinations (final percent scores of 87.3 and 88.9, respectively). This result also held true for students in the top and bottom 20th percentiles of the class. Moreover, time limits did not lead to errors on even the most difficult, higher‐order questions (i.e., items with P‐values < 0.70). Thus, limiting time at testing stations during an anatomy practical examination does not adversely affect student performance. Anat Sci Educ 6: 281–285. © 2013 American Association of Anatomists.  相似文献   

18.
Søvik, N. 1977. Individual Instruction in Norwegian (The PODIN Project). Scandinavian Journal of Educational Research, 21, 197‐232. As the principle of integration instead of segregation has become dominant in the planning and organization of the Norwegian school (1st to 9th grade), different kinds of individualized instruction have been recommended to the teachers to use. The main problem behind the project reported here was to investigate whether, and to what extent, an experimental program of individualized instruction within an ordinary school class would improve students’ performance in oral and written Norwegian compared with traditional instruction. It was carried out in three parallel studies with first‐graders and a new series of three experiments with second‐graders.  相似文献   

19.

More universities are offering online instruction for students though we know little about effective online learning. Some have found online instruction increases student participation while others have reported that students prefer the traditional face‐to‐face format This study of gifted education graduate students follows the expectation that online students ought to have time to be more thoughtful with online course interactions as compared to the time‐constrained interactions in a face‐to‐face course. Researchers evaluated students’ thinking levels (as per Bloom's Taxonomy) in the online discussion forums required by a graduate course in gifted education. Results indicate there was no relationship between the level of the prompt and the level of the responses. Higher level prompts did not necessarily generate higher level responses. The research‐developed Rubric for Evaluation of Online Discussions can be used both as an instructional guide and as an evaluation rubric to assess the level of online discussions.  相似文献   

20.
The effects of instruction and achievement on science question level for high and low science topic interests were investigated. Eight seventh‐grade classes were randomly assigned to two treatments: instruction and no instruction on researchable questioning. Each student completed the Middle School Students' Science Topic Interest Rating Scale (test‐retest reliability, r = .84); selected two topics in which she or he was least interested and two topics in which she or he was most interested; wrote questions for each topic; and took the Stanford Achievement Tests in reading, mathematics, and science. The questions were rated using the four levels described by the Middle School Students' Science Question Rating Scale (interrater reliability, r = .96). The scores for each question were averaged for two raters, then summed for each interest level for each student. The data were analyzed for main and interaction effects using general linear modeling procedures. Question level was modeled with one within‐subjects factor (science topic interest) and four between‐subjects factors (instruction and three achievement scores). The results indicate that students who received instruction outperformed those students who were not instructed; and high achievers in mathematics, reading, or science outperformed low achievers. There were no interaction effects. © 2000 John Wiley & Sons, Inc. J Res Sci Teach 37: 210–224, 2000  相似文献   

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