Deriving individual student marks from a tutor’s assessment of group work

The use of group work, in which three or more students jointly produce a piece of work for summative assessment, is an established aspect of teaching and learning in higher education. Opinions vary however about whether their marks should vary according to the respective contributions they made to the work. This paper is based on the assumption that if adjustments are to be made, they should be made on sound statistical grounds. Current methods for adjusting student marks do not allow the size of the adjustments to be controlled and empirical data are presented which show that very large adjustments can occur. This paper presents a method for deriving final student marks from a single tutor mark and ratings which students make of each other’s contributions. The method incorporates a mechanism for directly controlling the size of the adjustments made. It is demonstrated using data from students following a degree programme in computing. A spreadsheet has been written which undertakes the calculations necessary to apply the method.     

The structure of knowledge and departmental social organization

This case study of three university departments was designed to generate substantive theory about decision-making in academic departments. Using Homans' social systems theory as a framework, the theory postulates that the degree of parádigm development of a discipline affects the extent of interaction in the external and internal systems of its associated departments. The rate of interaction affects the crystallization of norm structures and consequently processes of influence and decision-making.     

The influence of narrative and expository lesson text structures on knowledge structures: alternate measures of knowledge structure

This investigation applies two approaches for representing and comparing text structures as undirected network graphs to describe the influence of narrative and expository lesson texts on readers’ knowledge structure elicited as free recall. Narrative and expository lesson texts and undergraduate participants’ free recall essays (n = 90) from a study by Wolfe and Mienko (Br J Educ Psychol 77, 541–564, 2007) were reanalyzed for lexical proximity as sequential occurrence of selected important terms in the text and as actual minimum distances between these terms. The proximity data were then rendered as Pathfinder networks for analysis. Compared to human-rater benchmark measures, the convergent validity of the sequential approach (range of r = .53 to .83, median r = .70) was a little better than that of the minimum distance approach (.51 to .80, median r = .67). Further, we anticipated that the lesson text structure would be reflected in the text structure of the free recall essays, but this was not observed. On average, the essays in all three lesson conditions tended to converge on a sequential expository structure. Further, compared to the expository lesson texts, the narrative lesson text had a distinctly different influence on posttest recall essay text structures. Overall then, the sequential occurrence approach appears to provide a reasonably good, automatically derived method for representing and comparing lesson texts and participants’ essays as network graphs. If further confirmed and fully automated, there is a wide range of application of such measurement approaches for learning and research.     

A new instrument for measuring pre-service biology teachers' pedagogical content knowledge: The PCK-IBI

Teachers' pedagogical content knowledge (PCK) is highly important for effective design and implementation of school teaching. Thus, the current status, development and efficacy of this knowledge, its relationships with teaching quality parameters, and its impact on students' learning processes and success, require rigorous examination. Thoroughly validated, objective and reliable test instruments that are highly sensitive to changes in variables of proven knowledge-related relevance in teacher education are also required. Previous attempts to design such instruments for assessing science teachers' PCK have largely focused on mathematical content. Therefore, here we present an instrument (the pedagogical content knowledge in biology inventory, PCK-IBI), based on conceptualizations of teachers' professional competence, for assessing secondary school pre-service biology teachers' PCK. In a series of three evaluations and refinements it was tested with samples of N = 274 and N = 432 German pre-service as well as one sample of n = 65 German pre-service and n = 35 German in-service biology teachers. Item analysis, scale analysis and empirically obtained indicators of validity suggest that the final 34-item-version of the PCK-IBI is unidimensional, provides objective test scores and enables reliable and valid registration of pre-service biology teachers' PCK. Thus, hypotheses regarding specific aspects of the model on which the PCK-IBI's construction is based on are empirically supported. The results of our study provide empirical support for the instrument's potential utility.     

The development of children's knowledge of temporal structure

Adults have a rich understanding of a number of time systems, but little is known about how this knowledge develops. 3 experiments were conducted to test a model in which the first representations of the days of the week and months of the year have verbal-list properties, and these are later supplemented by image representations. In Experiments 1 and 2, fourth or fifth graders could judge forward relative order for these contents, but not until adolescence could backward order judgments be made accurately. In Experiment 3, fourth graders used a serial process to solve a categorical distance judgment task, whereas older groups shifted to a process with more rapid access to information about the position of remote items. The results are interpreted as supporting the 2-stage model and appear inconsistent with a number of alternative models.     

The effects of a combination of text structure awareness and graphic postorganizers on recall and retention of science knowledge

The purpose of this study was to determine the effectiveness of a self-regulated strategy on immediate recall and retention of science knowledge in community-college anatomy and physiology students who participated in a 14-hour (8 weeks) study skills class. The class emphasized the recognition of five common science textbook text structures (cause and effect, classification, enumeration, generalization, and sequence) and the construction of graphic postorganizers of the text structures. A pretest, two immediate posttests, and a retention posttest were used to measure recall and retention. Results indicated that on immediate posttests students who actively constructed graphic postorganizers of the test structure recalled significantly more content than did the control students who simply underlined, reread, or highlighted. On a 3-week retention posttest, those students in the study skills class retained significantly more of the material studied than did the control group of students.     

Automatic representation of knowledge structure: enhancing learning through knowledge structure reflection in an online course

Educational technology research and development - Summary writing is an important skill that students use throughout their academic careers, writing supports reading and vocabulary skills as well...     

新型物理教师的知识结构和特点

新课程已进入全面实施阶段，教师要适应新的教育改革与发展，其知识结构有待进一步优化和建构．本文结合中学物理教师的职业特点和教育改革的需要，初步探讨了新形式下物理教师的知识结构组成及其特点。     

Topoi and literary interpretation: The effects of a critical reading and writing intervention on high school students’ analytic literary essays

Literary scholars use specific critical lenses called topoi (Fahnestock & Secor, 1991) to read literature and write their interpretations of these texts. Literary topoi are used in the discourse of modern college literature classrooms (Wilder, 2002) and are associated with higher grades in students’ literature classes ( [Wilder, 2002] and [Wilder, 2005] ). However, research shows that high school students are generally unable to justify their literary interpretations (Marshall, 2000). In this study, six high school students were taught a strategy to recognize and use topoi to form an interpretation of literature, and then write an argument to support that interpretation. Three of the students were taught to recognize repeated examples of single patterns of symbolism and imagery that support a theme, i.e., the ubiquity topos. The other three were taught to recognize opposing patterns of symbolism and imagery that support a theme, i.e., the paradox topos. All participants were then taught to form arguments based on the topoi, to utilize direct quotations to back their arguments, and to write “tie-in sentences” that link the quotations to the writers’ arguments. Instruction about these topoi resulted in higher quality argumentative essays that provided more textual evidence to support their literary interpretations.     

The effects of content and audience awareness goals for revision on the persuasive essays of fifth- and eighth-grade students

The purpose of the study was to investigate the effects of revising goals focused on content and audience awareness on the persuasive writing of fifth- and eighth-grade students. Students were randomly assigned to three different goal conditions: a general goal; a goal to improve content; and a goal to improve content and communication with an audience. Final drafts of essays were scored for elements of persuasive discourse relevant to content and audience and for overall persuasiveness. Students in the audience goal group were more likely than both other groups to consider opposing positions and rebut them. Students in both the content and audience goal groups wrote essays that were more persuasive than essays by students in the general goal group. The results also indicate that eighth-grade students wrote more persuasively than fifth-grade students and that girls wrote more persuasively than boys.     

The effects of reticence on group interaction

Research regarding the effects of reticence on group interaction reveals that reticence does not necessarily impede the group process; however, reticent individuals are seen as less effective participators due to their limited vocal activity, and they are less likely to emerge as the group's leader.

Research on the effects of reticence on group interaction is reviewed and suggestions are made to instructors of the small groups course regarding helping reticent students participate in the small group.     

语篇分析与名形词类转换的英译

从语篇分析的角度,结合语境和语义联想场,确定名词在某一特定语境中的确切含义,并找出与之对应的表示附加意义的形容词来进行翻译。根据具体语境不同,翻译方法也不相同。