Optimizing stereo separation in color television anaglyphs

A method is described for minimizing the ghost images which normally appear when anaglyphs are presented on color television screens. This is done by careful adjustment of the phosphor levels in each of the anaglyph regions.     

Simple algorithms for creating random-element stereograms on the Macintosh

Traditionally, the creation of random-element stereograms is a computation-intensive process. However, by taking advantage of routines built into the Macintosh operating system, multiple-depth stereogram anaglyphs can be easily created from any black-and-white or grayscale image. Any complex shape can be selected from the pattern and offset in one eye’s view relative to the other’s to create the illusion of depth, without the need to calculate offsets on an element-by-element basis.     

Some consequences of stereoscopic depth constancy

Retinal disparity decreases in proportion to the square of the distance of the corresponding objective depth interval from the eyes. Up to a distance of 2 m, stereoscopic depth perception compensates well for this decrease in disparity with observation distance; for a given disparity, experienced depth increases approximately in proportion to the square of the observation distance. When disparities are artificially produced, by anaglyphs or vectograms, or by spectacles, they decrease only in proportion to the first power of the observation distance. The same is true when the Pulfrich effect gives rise to equivalents of disparity. Depth perception, however, compensates for the normal disparity loss. As a result, there should be a net gain in perceived depth approximately in proportion to the first power of observation distance. When perceived depth caused by horizontal magnification in one eye or by the Pulfrich effect was measured, it was found to increase approximately in proportion to observation distance.     

青少年未来取向三种测试途径的比较

考察未来取向测试新方法（作品分析法）有效性及对比已有测量方法(自陈问卷法、行为测试法)的优缺点。结果发现,问卷法测得青少年未来取向水平随年龄增长逐渐降低,行为测试法和作品分析法测得青少年未来取向水平随年龄增长逐渐提高;问卷法测得未来取向与学校投入相关密切,行为测试法测得未来取向与学业成绩相关密切,作品分析法测得未来取向与学校投入、学业成绩均相关。作品分析法是一种有效测量青少年未来取向的新途径。     

接受设计学法之可行性的例证研究

通过验证近义词法在学生记忆英语单词中的有效性,探讨接受设计学法的可行性。４组学生分别采用一种方式完成记忆１２０个英语单词的作业任务。结果表明：近义词法是中国学生记忆英语单词有效的方法;对于大学生记忆英语单词来说,接受根据近义词法设计学习的效果要好。     

Cognitive Task Analysis for Implicit Knowledge About Visual Representations With Similarity Learning Methods

Visual representations are prevalent in STEM instruction. To benefit from visuals, students need representational competencies that enable them to see meaningful information. Most research has focused on explicit conceptual representational competencies, but implicit perceptual competencies might also allow students to efficiently see meaningful information in visuals. Most common methods to assess students’ representational competencies rely on verbal explanations or assume explicit attention. However, because perceptual competencies are implicit and not necessarily verbally accessible, these methods are ill‐equipped to assess them. We address these shortcomings with a method that draws on similarity learning, a machine learning technique that detects visual features that account for participants’ responses to triplet comparisons of visuals. In Experiment 1, 614 chemistry students judged the similarity of Lewis structures and in Experiment 2, 489 students judged the similarity of ball‐and‐stick models. Our results showed that our method can detect visual features that drive students’ perception and suggested that students’ conceptual knowledge about molecules informed perceptual competencies through top‐down processes. Furthermore, Experiment 2 tested whether we can improve the efficiency of the method with active sampling. Results showed that random sampling yielded higher accuracy than active sampling for small sample sizes. Together, the experiments provide the first method to assess students’ perceptual competencies implicitly, without requiring verbalization or assuming explicit visual attention. These findings have implications for the design of instructional interventions that help students acquire perceptual representational competencies.     

哲学思想为医学生创新思维提供启思与导向

创新能力与哲学素养直接相关,创新思维是哲学素养的运用和拓展。目前,医学思维能力培养中存在极大限制医学生想象力和创造力的问题,一是受权威迷信的束缚,二是受传统思维框架的束缚。基于此现状,本研究探讨培养医学生创新思维能力应采取的对策与措施,体现了哲学思想对医学生创新思维的启思与导向作用。     

Prospective conceptual model of Tomatis® method effects on students’ self-regulation

This study aimed to develop a preliminary conceptual model that explains the perceived effect of the Tomatis® method on university students’ self-regulation for study course learning. Seven beginning graduate students (6 female; 3 black, 4 white) with a large South African university completed a Tomatis® method programme student learning support intervention. The students participated in focus group discussion and brief survey on their Tomatis® method programme student learning support experiences. Thematic analysis identified five themes that define Tomatis® method programme self-regulation effects on students: i) being self-aware and enhanced environmental sensitivity; ii) improved study concentration per time frame; iii) perspective taking, willingness, and ability to listen to others’ opinions; iv) self-reflection or enhanced inward learning experience; and v) boldness, creativity and open-mindedness. Findings support a conceptual working model of the Tomatis® method for the promotion of learner self-regulation and behavioural change in a university setting.     

A Comparison of Computation,Discovery, and Graph Procedures for Improving Students' Conception of Average Speed

This study compared the effectiveness of three different instructional methods for improving students' estimates of average speed. In the discovery method students saw a computer simulation of the two speeds of a round trip. A second reference point simulated students' estimated speed to provide visual feedback on the accuracy of their estimates. In the graph method students saw a graph of how the initial speed of a round trip influenced the average speed when the return speed was held constant. In the computation method students calculated the answers to average speed problems. The discovery method was fairly successful than anticipated, and the computation method had little impact. The discussion analyzes the strengths and weaknesses of each method in presenting knowledge about specifics, trends, and principles.     

Psychological validation of the Rosenberg Self-Esteem Scale (RSES) in South Africa: Method effects and dimensionality in black African and white university students

The study examined the factor structure and cross-cultural validity of the Rosenberg Self-esteem Scale (RSES) in a sample of South African students (N = 862; black African = 67%, female = 71.5%). Alternative a priori CFA models (unidimensional, bi-dimensional and unidimensional models comprising either latent method factor or correlated residuals) were evaluated. Results indicated that the RSES in black and white South African university students is represented by a unidimensional model with correlated residuals of negatively and positively phrased items. Findings also suggested method effects on black African students to be significantly associated with negatively worded items compared to white students. Method bias effects appear to show for some RSES items and this may have important implications for the cross-cultural utility of the RSES in South Africa.     

What is the internet? Taiwanese high school students' perceptions.

This study gathered 588 Taiwan high school students' responses about their perceptions of the Internet. The high school students highlighted the views that the Internet was a technology and a tool. Further analyses revealed that the students in lower grades and female students tended to conceptualize that the Internet was mainly a technology. On the other hand, the students in higher grades or male students emphasized other pragmatic aspects of the Internet, such as using it for functional or pleasure purposes, for instance, using the Internet as a tool, a toy, or a method of guiding a tour.     

说明文形式图式阅读策略训练提高初中生阅读水平的实验研究

本研究以两所中学的136名初二学生为实验被试．采取平衡组实验设计,编制专门的(实验教程)．以专门训练与日常教学渗透相结合和专门集中训练两种方式进行说明文形式图式阅读策略训练。实验结果表明：1。说明文形式图式阅读策略训练可提高学生的阅读理解水平;2。策略训练对优生、中等生的帮助更大;3。在迁移效果上,阅读策略的专门训练与教学渗透相结合的训练明显优于专门的集中训练。4。在本实验的延迟测验条件下．对策略的运用,激活组显着优于未激活组。     

A self-paced programmed undergraduate course in the experimental analysis of behavior

A method of programming a variety of assignments in a course was described. The instructions to students, the course assignments, and the grading system were presented in detail. The rate at which students performed the activities was examined. Different students began working at different times during the semester, but once a student began to complete assignments he continued to work at a rate comparable to all other students. No students stopped working after once beginning to work. The majority of the students liked the course despite being overworked. Several changes in the method were suggested based on the data from this course.     

Students’ achievement motivation in Finnish and Chinese higher education and its relation to perceived teaching-learning environments

This cross-cultural study of Finnish and Chinese students set out to compare the levels of achievement motivation (AM) in order to investigate whether the differences in them might be explained by the different cultural response styles and whether these response styles could be controlled for with a method which includes response style variables as covariates in ANCOVA. This study also scrutinizes relationships between perceived teaching-learning environments (TLE) and AM within each cultural group. The survey sample consisted of 3,035 Finnish and 2,309 mainland Chinese university students. Finnish students were found to rate the level of AM markedly higher than do Chinese students. It was determined that the method applied for response style controlling is not suitable for cross-cultural studies, even though it is recommended for this use. A modification of the method, which is based on robust statistical tools, was found not to change this conclusion, but it can nevertheless be used to obtain useful information about the effects of response style differences. The results also show that similar relationships between AM and TLE could be identified in the data of both groups. However, for the Finnish group AM is related to perceived suitable workload, whereas for the Chinese group it is related to teacher encouragement.     

样例关键特征变异数量对学习解方程的影响

186名初一年级学生通过对比三种不同变异类型的样例学习解一元一次方程,他们对比方程问题类型和解法这两个关键特征的变异、只对比问题类型的变异、或者只对比解法的变异。结果显示样例关键特征不同变异类型的学习效果受到学生先前知识的影响：对于在前测中没有使用简便方法的学生,变异类型和解法两个关键特征比只变异类型或解法其中一个关键特征更有利于他们学习变通性知识和概念性知识;而对于在前测中有使用简便方法的学生,不同变异类型的效果没有显著差别。多重样例变异性的设计需要提供机会让学生充分对比学习每个关键特征。     

International students' experiences of integrating into the workforce

This study explored the integration experiences of 16 international students entering the Canadian workforce using a semistructured interview and constant comparison method. The international students were pursuing immigration to Canada, despite unmet job prospects. Students recommended that employers refrain from discriminating against students because of their international status and recognize the value of a diverse labor force. Students recommended that career services personnel help students build networks and employment contacts through pregraduation work experience. Incoming international students were advised to educate themselves about cultural norms for social and work interactions, research potential job opportunities, and create a professional network prior to degree completion.     

翻转教学法对高中生认知负荷及学习成绩的影响

采用不等组实验组、控制组前测后测的准实验设计,探讨了翻转课堂背景下翻转教学法对高中生认知负荷及学习成绩的影响。结果发现：（1）翻转教学法能有效降低高中生的内在认知负荷,提高其学习成绩与学习效率;（2）翻转课堂背景下,高中生的认知负荷存在知识反转效应,即高成绩者的收益低于低成绩者。结果提示,翻转课堂取得优异学习效果的心理机制在于通过有效降低学习者的内在认知负荷而影响其学习成绩;同时,翻转教学法的运用过程中须考虑学习者认知负荷的变化及学习效率,其对所有的学习者不是同等有效的。     

The factor structure of the Vocational Preference Inventory for black and white college students

This study investigated whether the variables measured by the Vocational Preference Inventory (VPI) were the same for both black and white students. Kaiser et al. (1969) have noted that the same measurements used with different populations may not measure the same variables and have presented a method of determining the degree of correspondence in the two populations. In the present study, the VPI scores for a group of black students and a group of white students were factor analyzed separately and the black structure was rotated to correspond to the white structure. The correspondence between the variables measured by the VPI for black and white students was found to be very similar. This is to say that the VPI measures the same variables for both black and white college students.     

不同焦虑类型的自我图式的实验研究

本文将焦虑大学生区分为三种类型,采用实验的方法研究焦虑大学生自我图式与正常大学生自我图式的差异,以及不同焦虑类型之间自我图式的差异,结果发现,焦虑大学生存在状态性的焦虑自我图式,状态焦虑大学生的自我图式也是状态性的,特质焦虑大学生不存在焦虑的自我图式     

新疆生产建设兵团某综合性大学2007年新生乙型肝炎病毒感染现状分析

为了解本校2007级新生乙肝病毒感染情况,为今后在高校开展乙型肝炎防治工作提供科学依据,采用酶联免疫吸附试验法,检测我校2007级入校新生的HBsAg及HBsAg阳性者的“乙肝病毒血清学检验”指标。结果显示2007级新生HBsAg阳性率为6．7％,男、女生阳性率分别为8．18％,4．13％,男女之间差异有统计学意义;汉族学生HBsAg阳性率高于其他少数民族学生;新生HBsAg阳性模式中以HBsAg、HBeAg、HBcAb和HBsAg、HBeAb、HBcAb模式为主,分别占41．24％和48．02％。因此,在人口密集的高校学生中应通过多种途径加强乙肝的预防治疗及宣传工作。