Cognitive load theory and aging: effects of worked examples on training efficiency

Cognitive load theory (CLT) is aimed at developing training material that efficiently makes use of the available cognitive processing capacity and stimulates the learner's ability to use acquired knowledge and skills in new situations. It is claimed that CLT-based training formats meet the cognitive abilities of elderly learners particularly well. That is, cognitive aging brings about several declines of working memory, which impede the acquisition of complex cognitive skills. By making an optimal use of the ‘remaining’ cognitive resources, learning can be enhanced. For that purpose, CLT provides a promising range of training formats that have proven their effectiveness relative to conventional formats in young adults. This article presents an experimental study (N=54) aimed at the efficiency of worked examples as a substitute for conventional practice problems in training both elderly and young adults. According to CLT, studying worked examples is a more efficient means of training complex skills than solving conventional problems. As predicted, the results show that — with respect to the elderly — the efficiency of studying worked examples is higher than the efficiency of solving conventional problems in that less training time and cognitive load leads to a comparable level of performance.     

The effects of worked examples in computer-based instruction: focus on the presentation format of worked examples and prior knowledge of learners

The aim of this study is to investigate the effects of presentation formats of worked examples and the interaction effects between the presentation formats of worked examples and the prior knowledge of learners. An investigation with 97 middle school students working in four conditions (CPWE, CWE, PWE, and the control group) was conducted. The results indicate that CPWE was the most effective condition in retention and transfer. In addition, a partial expertise reversal effect was revealed in the element transfer test. High prior knowledge learners in both CPWE and PWE were superior to those who were in CWE and the control group, while low prior knowledge learners in CPWE were superior to those who were in other conditions.     

Effects of process-oriented worked examples on troubleshooting transfer performance

In the domain of electrical circuits troubleshooting, a full factorial experiment investigated the hypotheses that (a) studying worked examples would lead to better transfer performance than solving conventional problems, with less investment of time and mental effort during training and test, and (b) adding process information to worked examples would increase investment of effort during training and enhance transfer performance; whereas adding it to conventional problems would increase investment of effort, but would not positively affect transfer performance. The first hypothesis was largely confirmed by the data; the second was not: adding process information indeed resulted in increased investment of effort during training, but not in higher transfer performance in combination with worked examples.     

Tracing worked examples: effects on learning in geometry

Previous research has verified the benefits obtained when learners trace out worked examples with the index finger. Our study conducted two experiments to explore the reasons for this phenomenon and its generalizability. Experiment 1 compared the learning effects among tracing, non-tracing, and cueing methods. The cueing method was included to isolate the variable of drawing attention. Students employing the tracing method obtained higher transfer test scores compared to those employing the cueing and non-tracing methods, rating the far transfer test as easier. The tracing effect was verified to have a greater impact on learning than solely focusing learners’ attention. Experiment 2 compared the learning effects among three methods – tracing with the index finger, tracing with a computer mouse, and observing others tracing. Students who merely observed tracing obtained lower far transfer scores than those who traced either with their finger or with the mouse, rating the tests as more difficult. There was no significant difference between the other two groups. Tracing promotes learning more than merely observing tracing. The learning benefits of tracing partly stem from the fact that it is action-based and can be generalized to mouse tracing.     

Effects of worked examples on step performance in solving complex problems

The instructional effect of worked examples has been investigated in many research studies. However, most of them evaluated the overall performance of the participants in solving post-intervention problems, rather than individual step performance in multi-step problems. The two experiments reported in this article investigated the relations between using worked examples and individual step performance in solving isomorphic problems. In Experiment 1, the effect of worked examples was found for overall performance for novice learners, whereas this effect was gradually reduced from Step 1 (the most difficult one) at which the effect was the strongest, to Step 3 (the easiest one) at which the effect was the weakest or even disappeared. In Experiment 2, relatively more knowledgeable participants learned the same sets of materials, and no effect of worked examples was found for either overall performance or individual step performance. Learner levels of expertise and levels of element interactivity were used to explain the results.     

The effect of worked examples on student learning and error anticipation in algebra

Instructional Science - The present study examines the effectiveness of incorporating worked examples with prompts for self-explanation into a middle school math textbook. Algebra 1 students...     

Effects of worked examples, example-problem, and problem-example pairs on novices’ learning

Research has demonstrated that instruction that relies more heavily on example study is more effective for novices’ learning than instruction consisting of problem solving. However, ‘a heavier reliance on example study’ has been implemented in different ways. For example, worked examples only (WE), example-problem pairs (WE-PS), or problem-example pairs (PS-WE) have been used. This study investigated the effectiveness of all three strategies compared to problem solving only (PS), using electrical circuits troubleshooting tasks; participants were secondary education students who were novices concerning those tasks. Based on prior research, it was hypothesized and confirmed that WE and WE-PS would lead to lower cognitive load during learning and higher learning outcomes than PS. In addition, the open questions of whether there would be any differences between WE and WE-PS, and whether there would be any differences between PS-WE and PS were explored. Results showed no differences between WE and WE-PS or between PS-WE and PS. This study can inform instructional designers on which example-based learning strategies to implement: it does not seem necessary to alternate example study and problem solving, but when doing so, example-problem pairs should be used rather than problem-example pairs.     

The expertise reversal effect and worked examples in tutored problem solving

Prior research has shown that tutored problem solving with intelligent software tutors is an effective instructional method, and that worked examples are an effective complement to this kind of tutored problem solving. The work on the expertise reversal effect suggests that it is desirable to tailor the fading of worked examples to individual students’ growing expertise levels. One lab and one classroom experiment were conducted to investigate whether adaptively fading worked examples in a tutored problem-solving environment can lead to higher learning gains. Both studies compared a standard Cognitive Tutor with two example-enhanced versions, in which the fading of worked examples occurred either in a fixed manner or in a manner adaptive to individual students’ understanding of the examples. Both experiments provide evidence of improved learning results from adaptive fading over fixed fading over problem solving. We discuss how to further optimize the fading procedure matching each individual student’s changing knowledge level.     

Improving problem solving with subgoal labels in expository text and worked examples

In highly procedural problem solving, procedures are typically taught with context-independent expository text that conceptually describes a procedure and context-dependent worked examples that concretely demonstrate a procedure. Subgoal labels have been used in worked examples to improve problem solving performance. The effect of subgoal labels in expository text, however, has not been explored. The present study examined the efficacy of subgoal labeled expository text and worked examples for programming education. The results show that learners who received subgoal labels in both the text and example are able to solve novel problems better than those who did not. In addition, subgoal labels in the text appear to have a different, rather than an additive, effect on learners compared to subgoal labels in the example. Specifically, subgoal labels in the text appear to help the learner articulate the procedure, and subgoal labels in the example appear to help the learner apply the procedure.     

Tutor training for service learning: impact on self-efficacy beliefs

The aim of my study was: (a) to measure the effectiveness of a supporting tutor-training curriculum and content knowledge gains for preservice teachers engaged in service learning and (b) to determine whether tutor training and field experience improved the preservice teachers’ teaching self-efficacy beliefs. One hundred and thirteen upper-division undergraduate students enrolled in Social Foundations of Multicultural Education courses participated in course-embedded tutor-training and fulfilled a 20-h service-learning requirement by tutoring pupils in local elementary schools. Analyses of variance (ANOVA) on a pretest and posttest measures of content knowledge, tutoring skills, and teaching self-efficacy demonstrated a statistically significant difference with higher mean scores at the post time. These results suggest that a course-specific tutor-training curriculum advances the participants’ knowledge and skill in tutoring. The results also indicate that the combination of tutor training and field application (i.e. tutoring in a classroom) function to increase students’ self-efficacy as future teachers.     

Finding and fixing errors in worked examples: Can this foster learning outcomes?

Learning from worked examples is an effective learning method in well-structured domains. Can its effectiveness be further enhanced when errors are included? This was tested by determining whether a combination of correct and incorrect solutions in worked examples enhances learning outcomes in comparison to correct solutions only, and whether a mixture of correct and incorrect solutions is more effective when the errors are highlighted. In addition, the effectiveness of fostering self-explanations was assessed. In Experiment 1, the participants learned to solve probability problems under six conditions that constituted a 2 × 3-factorial design (Factor 1: correct and incorrect solutions with highlighting the errors vs. correct and incorrect solutions without highlighting the errors vs. correct solutions only; Factor 2: prompting written self-explanations vs. no prompts). An aptitude-treatment interaction was found: providing correct and incorrect solutions fostered far transfer performance if learners had favourable prior knowledge; if learners had poor prior knowledge correct solutions only were more favourable. Experiment 2 replicated this interaction effect. Thus, a mixture of correct and incorrect solutions in worked examples enhanced learning outcomes only for “good” learners. In addition, Experiment 2 showed that confronting learners with incorrect solutions changed the quality of their self-explanations: on the one hand, new types of effective self-explanations could be observed, but on the other hand the amount of the very important principle-based self-explanations was substantially reduced. A possible measure to prevent this negative side effect of incorrect solutions is discussed.     

An Experiment to Evaluate the Efficacy of Cognitive Tutor Geometry

Abstract

This randomized, controlled field trial estimated the causal impact of a technology-based geometry curriculum on students’ geometry achievement, as well as their attitudes toward mathematics and technology. The curriculum combines learner-centered classroom pedagogy with individualized, computer-based student instruction. Conducted over a 3-year period in eight high schools within an urban fringe district, the study found that students assigned to the treatment curriculum scored 19% of a standard deviation lower on the geometry posttest than their counterparts assigned to the district's standard curriculum, but found no statistically significant impact on students’ attitudes toward mathematics and technology. Researchers also collected observation and interview data on teachers’ instructional practices. These data suggest that many teachers had difficulty implementing the treatment curriculum's learner-centered pedagogy. In fact, observed levels of learner-centered practices were only modestly higher in treatment classes than in control classes. In both treatment and control classes, however, higher levels of learner-centered pedagogy were associated with higher student achievement in geometry.     

军事训练场馆建设的模式化研究

为贴近军队实战要求,提高院校军事训练场馆的服务保障能力,采用将军事训练场馆作为一个保障实体交予使用方集中管理的模式,提出以教学训练为中心,拓展院内、院外两级功用,坚持重点突破与整体推进相结合、硬件建设与软件服务相结合、长远发展与立足当前相结合的3项原则,开展框架搭建、条件使用、管理实施、资源开发等4类工程;提出加强军地融合的军事训练场馆建设、发展与集约化运行的思路和措施。     

加强职工培训构建学习型企业

江泽民同志在亚太经合组织人力资源能力建设高峰会议上提出:“教育是人力资源能力建设的基础,学习是提高人的能力的基本途径。要通过政策指导和舆论引导,营造尊师重教、求知好学的社会氛围。加快社会化终身教育体系建设,大力发展职业教育,建立广覆盖、多层次的教育培训网络。鼓励人们通过多种形式参与终身学习,拓展与更新知识,提高     

Problem Solving in Geometry: Comparing the effects of non-goal specific instruction and conventional worked examples

This study examines the extended effects of an instructional program designed to enhance schema development by using non-goal specific problems, in the teaching of geometry to high school students in need of remedial tuition. A multiple baseline across-subjects experimental design was used to compare the effects of this program with another method of teaching this subject--that is, using worked examples. This methodology provides detailed information on the shifts and changes associated with learning processes for particular individuals during the actual process of schema acquisition. Dependent measures included test performance, error analysis, time analysis, directionality and generalisation. Results indicate that participants in the non-goal specific group showed greater improvements, solving problems faster, more efficiently, more accurately and with fewer errors and greater consistency. These findings are discussed in terms of their implications for the design of mathematics instructional material.     

Effects of Tutor‐Tutee Intimacy,Tutoring Conditions and Tutor Background on College Student Tutor Satisfaction

Path analysis was used to examine the effects of tutor‐tutee intimacy, tutoring conditions and background variables on overall tutor satisfaction, as well on specific satisfaction from achievements, rewards, and relationships. University student tutors (n = 472), who worked with younger children under the auspices of the PERACH Project in Israel, participated in the study. Results revealed higher satisfaction among tutors who reported greater intimacy with tutees and who were able to hold tutorial sessions without difficulty. More intimate tutoring relations were found when pairs were matched by ethnicity, when telephone contact with the tutee was easy, when sessions were easily held, and for female same‐sex pairs.     

Training higher education teachers for instructional design of competency-based education: Product-oriented versus process-oriented worked examples

Teachers involved in the development of competency-based higher education (CBE) are expected to fulfil a new role of instructional designer. As a consequence, they are confronted with the problem to translate abstract new curriculum principles into concrete learning tasks. Recent studies have shown that teachers can be trained to apply an instructional systems design methodology. After this training the teachers were able to design better learning tasks for CBE in comparison with their experienced-based design efforts. In order to optimize the training, this study compares an experimental condition with process-oriented worked examples with a conventional training condition with emphasis on product-oriented worked examples. After the training, the participants—25 higher education teachers—had to apply the ISD methodology to two design problems. The quality of the resulting design materials, as rated by experts, was higher in the product-oriented worked examples condition than in the process-oriented worked examples condition. The significance of this finding for training approaches to design methodology for CBE is discussed.     

校企合作共建软件实训中心的探索与实践

产学研结合是国家科技与社会生产结合的成熟经验,而理论知识与实际具体业务脱节是高校人才培养中急需解决的问题.校企联合共建软件实训中心,营造企业工作氛围,模仿企业运作流程,为学生接轨市场需求提供过渡平台,是教学理念改革的一次全新尝试,开拓了一条为企业提供实用型人才的新路.     

建设国内一流工程实训中心的实践探索

天津职业技术师范大学在创建国家级实验教学示范中心过程中,坚持建设理念、运行管理、教学体系和服务平台的创新,以教学建设为龙头,不断拓展示范中心建设内涵,构建适应现代工程训练的工程实训教学体系、拓展教学方法,规范中心管理,开展创新活动,搭建多功能服务平台,实现了实训实验教学服务师生和社会的双向功能,发挥了国家级实验教学示范中心的示范辐射作用。