建筑装饰技术专业中的素描教学

素描是建筑装饰技术专业中的基础内容,也是重要的教学内容。因此,素描教学在建筑装饰技术专业中显得特别重要。认真研究建筑装饰技术专业申的素描教学,对于务实建筑装饰技术专业学生的基础,培养学生的创新能力大有裨益。     

Learning about students’ knowledge and thinking in science through large-scale quantitative studies

The main issue addressed in this article is that there is much to learn about students’ knowledge and thinking in science from largescale international quantitative studies beyond overall score measures. Response patterns on individual or groups of items can give valuable diagnostic insight into students’ conceptual understanding, but there is also a danger of drawing conclusions that may be too simple and nonvalid. We discuss how responses to multiple-choice items could be interpreted, and we also show how responses on constructed-response items can be systematised and analysed. Finally, we study, empirically, interactions between item characteristics and student responses. It is demonstrated that even small changes in the item wording and/or the item format may have a substantial influence on the response pattern. Therefore, we argue that interpretations of results from these kinds of studies should be based on a thorough analysis of the actual items used. We further argue that diagnostic information should be an integrated part of the international research aims of such large-scale studies. Examples of items and student responses presented are taken from The Third International Mathematics and Science Study (TIMSS).     

An Investigation of Explanation Multiple-Choice Items in Science Assessment

Both multiple-choice and constructed-response items have known advantages and disadvantages in measuring scientific inquiry. In this article we explore the function of explanation multiple-choice (EMC) items and examine how EMC items differ from traditional multiple-choice and constructed-response items in measuring scientific reasoning. A group of 794 middle school students was randomly assigned to answer either constructed-response or EMC items following regular multiple-choice items. By applying a Rasch partial-credit analysis, we found that there is a consistent alignment between the EMC and multiple-choice items. Also, the EMC items are easier than the constructed-response items but are harder than most of the multiple-choice items. We discuss the potential value of the EMC items as a learning and diagnostic tool.     

Reliability and Attribute-Based Scoring in Cognitive Diagnostic Assessment

The attribute hierarchy method (AHM) is a psychometric procedure for classifying examinees' test item responses into a set of structured attribute patterns associated with different components from a cognitive model of task performance. Results from an AHM analysis yield information on examinees' cognitive strengths and weaknesses. Hence, the AHM can be used for cognitive diagnostic assessment. The purpose of this study is to introduce and evaluate a new concept for assessing attribute reliability using the ratio of true score variance to observed score variance on items that probe specific cognitive attributes. This reliability procedure is evaluated and illustrated using both simulated data and student response data from a sample of algebra items taken from the March 2005 administration of the SAT. The reliability of diagnostic scores and the implications for practice are also discussed.     

Toward a science for and of the people: promoting civil society through the application of developmental science

Applied developmental science (ADS) is scholarship that seeks to advance the integration of developmental research with actions-policies and programs-that promote positive development and/or enhance the life chances of vulnerable children and families. Through this integration ADS may become a major means to foster a science for and of the people. It may serve as an exemplar of the means through which scholarship, with community collaboration, may contribute directly to social justice. In so doing, ADS helps shift the model of amelioration, prevention, or optimization research from one demonstrating efficacy to one promoting outreach. When this contribution occurs in the context of university-community partnerships, ADS may serve also as a model of how higher education may engage policy makers, contribute to community capacity to sustain valued programs, and maintain and perpetuate civil society through knowledge-based, interinstitutional systems change.     

基于ADS射频电路匹配网络的建立

射频电路中的设计方法与低频电路中的设计方法有着较大的不同,其根本原因是随着频率的提高,其传输波的波长也下降到了可以和电路元件相比拟的状态。在此情况下,电路电压和电流都不再保持不变。本文旨在建立匹配网络,简单介绍传输线理论,并基于Advanced Design System（ADS）仿真软件对一实例进行阻抗匹配和分析,得出利用ADS进行阻抗匹配的方法。其结果表明,利用ADS对射频电路进行阻抗匹配是一种非常方便而快捷的方法,且有效地减少了电压驻波比（Voltage Standing Wave Ratio,VSWR）,提高了系统的传输效率。     

Gauging Item Alignment Through Online Systems While Controlling for Rater Effects

The alignment of test items to content standards is critical to the validity of decisions made from standards‐based tests. Generally, alignment is determined based on judgments made by a panel of content experts with either ratings averaged or via a consensus reached through discussion. When the pool of items to be reviewed is large, or the content‐matter experts are broadly distributed geographically, panel methods present significant challenges. This article illustrates the use of an online methodology for gauging item alignment that does not require that raters convene in person, reduces the overall cost of the study, increases time flexibility, and offers an efficient means for reviewing large item banks. Latent trait methods are applied to the data to control for between‐rater severity, evaluate intrarater consistency, and provide item‐level diagnostic statistics. Use of this methodology is illustrated with a large pool (1,345) of interim‐formative mathematics test items. Implications for the field and limitations of this approach are discussed.     

Validation of Cognitive Sensitivity for Item Response Curves

This study sought a scientific way to examine whether item response curves are influenced systematically by the cognitive processes underlying solution of the items in a procedural domain (addition of fractions). Starting from an expert teacher's logical task analysis and prediction of various erroneous rules and sources of misconceptions, an error diagnostic program was developed. This program was used to carry out an error analysis of test performance by three samples of students. After the cognitive structure of the subtasks was validated by a majority of the students, the items were characterized by their underlying subtask patterns. It was found that item response curves for items in the same categories were significantly more homogeneous than those in different categories. In other words, underlying cognitive subtasks appeared to systematically influence the slopes and difficulties of item response curves.     

An interview study of responses to diagnostic,multiple-choice,physics items

Conclusion In three-quarters of the student-item pairs the multiple-choice items correctly identified the use of adequate or inadequate strategies so on a general level the items might be thought to have performed satisfactorily. However as diagnostic tools they were generally inadequate and this fact points to the desirability of using the student-oriented procedure for constructing such items. In this procedure student understanding of the domain of knowledge is probed through interviews and distractors are designed to reflect the dominant types of misconceptions. The importance of the school-related context was something which emerged during the interviews and, in the light of the discrepancy between student understanding as revealed through school tests and interview studies, this is an area to which more attention needs to be given.     

用ADS仿真设计制作一种高性能的微带低通滤波器

介绍一种借助ADS(Advanced Design System)仿真设计软件,设计制作一种高性能微带低通滤波器的方法,并总结出用ADS软件仿真设计微带电路时应注意的问题。     

Infant-directed speech does not always involve exaggerated vowel distinctions: Evidence from Danish

This study compared the acoustic properties of 26 (100% female, 100% monolingual) Danish caregivers' spontaneous speech addressed to their 11- to 24-month-old infants (infant-directed speech, IDS) and an adult experimenter (adult-directed speech, ADS). The data were collected between 2016 and 2018 in Aarhus, Denmark. Prosodic properties of Danish IDS conformed to cross-linguistic patterns, with a higher pitch, greater pitch variability, and slower articulation rate than ADS. However, an acoustic analysis of vocalic properties revealed that Danish IDS had a reduced or similar vowel space, higher within-vowel variability, raised formants, and lower degree of vowel discriminability compared to ADS. None of the measures, except articulation rate, showed age-related differences. These results push for future research to conduct theory-driven comparisons across languages with distinct phonological systems.     

Evaluating Content-Related Validity Evidence Using a Text-Based Machine Learning Procedure

Validity evidence based on test content is critical to meaningful interpretation of test scores. Within high-stakes testing and accountability frameworks, content-related validity evidence is typically gathered via alignment studies, with panels of experts providing qualitative judgments on the degree to which test items align with the representative content standards. Various summary statistics are then calculated (e.g., categorical concurrence, balance of representation) to aid in decision-making. In this paper, we propose an alternative approach for gathering content-related validity evidence that capitalizes on the overlap in vocabulary used in test items and the corresponding content standards, which we define as textual congruence. We use a text-based, machine learning model, specifically topic modeling, to identify clusters of related content within the standards. This model then serves as the basis from which items are evaluated. We illustrate our method by building a model from the Next Generation Science Standards, with textual congruence evaluated against items within the Oregon statewide alternate assessment. We discuss the utility of this approach as a source of triangulating and diagnostic information and show how visualizations can be used to evaluate the overall coverage of the content standards across the test items.     

基于ADS的通信电路软件实验设计

针对大学实验教学中"通信电路"课程的实验只能用实验箱做验证性实验的实际情况,提出了用ADS软件平台进行"通信电路"课程实验教学的方法,设计了基于ADS的"通信电路"课程的相关实验,并以3个具体的实验进行说明。     

Acoustic design sensitivity analysis of structural sound radiation

This paper presents an acoustic design sensitivity(ADS)analysis on sound radiation of structures by using the boundary element method(BEM).We calculated the velocity distribution of the thin plate by analytical method and the surface sound pressure by Rayleigh integral,and expressed the sound radiation power of the structure in a positive definite quadratic form of the Hermitian with an impedance matrix.The ADS analysis of the plate was thus translated into the analysis of structure dynamic sensitivity and ...     

英语诊断性测试的研究与实践

本文根据英语诊断性测试的现状,论述开展诊断性测试的重要意义、测试类型、测试形式、编制原则和操作环节,以期有助于对学生的英语学习过程进行及时的干预。     

Psychometric defensibility of the Intervention Selection Profile‐Social Skills (ISP‐SS) with students at risk for behavioral concerns

The purpose of the current study was to examine the validity and diagnostic accuracy of the Intervention Selection Profile—Social Skills (ISP‐SS), a brief social skills assessment tool intended for use with students in need of Tier 2 intervention. Participants included 160 elementary and middle school students who had been identified through universal screening as at risk for behavioral concerns. Teacher participants ( n = 71) rated each of these students using both the ISP‐SS and the Social Skills Improvement System—Rating Scales (SSiS‐RS), with the latter measure serving as the criterion within validity and diagnostic accuracy analyses. Confirmatory factor analysis supported ISP‐SS structural validity, indicating ISP‐SS items broadly conformed to a single “Social Skills” factor. Follow‐up analyses suggested ISP‐SS broad scale scores demonstrated adequate internal consistency reliability, with hierarchical omega coefficient equal to 0.86. Correlational analyses supported the concurrent validity of ISP‐SS items, finding each ISP‐SS item to be moderately or highly related to its corresponding SSiS‐RS subscale. Finally, analyses indicated three of the seven ISP‐SS items that demonstrated sufficient diagnostic accuracy; however, findings suggest additional revisions are needed if the ISP‐SS is to be appropriate for use in schools. Implications for practice and future research are discussed.     

When Can We Improve Subscores by Making Them Shorter?: The Case Against Subscores with Overlapping Items

Subscores can be of diagnostic value for tests that cover multiple underlying traits. Some items require knowledge or ability that spans more than a single trait. It is thus natural for such items to be included on more than a single subscore. Subscores only have value if they are reliable enough to justify conclusions drawn from them and if they contain information about the examinee that is distinct from what is in the total test score. In this study we show, for a broad range of conditions of item overlap on subscores, that the value of the subscore is always improved through the removal of such items.     

The number line as a teaching aid

The number line is often recommended as an aid for the teaching of whole number addition and subtraction. The possible stages in young children's use of the aid are described, as is their ultimate outgrowing of this aid.Number line diagrams are also used in diagnostic and achievement test items to assess the understanding of whole number addition. This practice is discussed and criticised with the aid of the empirical findings of the second NAEP. Finally the wider role of number line diagrams in mathematics teaching is outlined.     

Relating Unidimensional IRT Parameters to a Multidimensional Response Space: A Review of Two Alternative Projection IRT Models for Scoring Subscales

A practical concern for many existing tests is that subscore test lengths are too short to provide reliable and meaningful measurement. A possible method of improving the subscale reliability and validity would be to make use of collateral information provided by items from other subscales of the same test. To this end, the purpose of this article is to compare two different formulations of an alternative Item Response Theory (IRT) model developed to parameterize unidimensional projections of multidimensional test items: Analytical and Empirical formulations. Two real data applications are provided to illustrate how the projection IRT model can be used in practice, as well as to further examine how ability estimates from the projection IRT model compare to external examinee measures. The results suggest that collateral information extracted by a projection IRT model can be used to improve reliability and validity of subscale scores, which in turn can be used to provide diagnostic information about strength and weaknesses of examinees helping stakeholders to link instruction or curriculum to assessment results.