Is having more prerequisite knowledge better for learning from productive failure?

A critical assumption made in Kapur’s (Instr Sci 40:651–672, 2012) productive failure design is that students have the necessary prerequisite knowledge resources to generate and explore solutions to problems before learning the targeted concept. Through two quasi-experimental studies, we interrogated this assumption in the context of learning a multilevel biological concept of monohybrid inheritance. In the first study, students were either provided or not provided with prerequisite micro-level knowledge prior to the generation phase. Findings suggested that students do not necessarily have adequate prior knowledge resources, especially those at the micro-level, to generate representations and solution methods for a multilevel concept such as monohybrid inheritance. The second study examined how this prerequisite knowledge provision influenced how much students learned from the subsequent instruction. Although the prerequisite knowledge provision helped students generate and explore the biological phenomenon at the micro- and macro-levels, the provision seemingly did not confer further learning advantage to these students. Instead, they had learning gains similar to those without the provision, and further reported lower lesson engagement and greater mental effort during the subsequent instruction.     

Parents' Reactions to Children's Negative Emotions: Relations to Children's Social Competence and Comforting Behavior

The purpose of this study was to examine the relations of mothers' and fathers' reported emotion-related practices to parents' and teachers' reports of third-to sixth-grade children's social skills, popularity, and coping, as well as the quantity and quality of children's comforting of an infant. Mothers' problem-focused reactions tended to be positively associated with children's social functioning and coping, whereas maternal minimizing reactions tended to be linked to lower levels of social competence and high levels of avoidant coping. There were few findings for fathers' reactions, although fathers reported fewer problem-focused reactions with socially competent, in contrast to less competent, daughters. Emotion-focused and problem-focused maternal reactions, as well as encouragement of the expression of emotion, were associated with boys' children's comforting behavior, although a moderate level of maternal encouragement of the expression of emotion was associated with quality of girls' comforting.     

Young children's attitudes toward the disabled: A classroom intervention using children's literature

With the increasing inclusion of special needs children in regular classrooms, experiences which encourage positive attitudes toward the disabled are essential. The purpose of this project was: 1) to examine the thinking and attitudes of young children regarding the capabilities of disabled children and the potential for friendship and 2) to assess the effectiveness of children's literature and related activities in influencing attitudes toward the disabled. Results suggested that children's attitudes were generally positive and realistic regarding the capabilities and the potential for friendship with the disabled. The use of selected children's books and book related activities positively influenced children's attitudes.     

Study on the failure mechanism of Ag-Ce contacts in DC level

Nominal contact resistance, minimum erosion and material transfer are required with low cost materials working in a wide currents range for DC relays. Ag-Ni contact materials have low contact resistance, but the erosion and material transfer are large at high current level. Ag-SnO2 contact materials have good anti-welding properties and resistance to arc erosion, but they have large contact resistance during working and are easily block SnO2 from flocking together on the surface at low current level. In this paper, the failure mechanisms of Ag-Ce contact material were studied. The surface morphologies of the contacts after electrical endurance test for Ag-Ce contact material were compared with that of Ag-Ni and Ag-SnO2 contact materials. The effect of Ce on the surface morphologies of the contacts after electrical endurance test was analyzed.     

Investigating the effectiveness of a learning activity supported by a mobile multimedia learning system to enhance autonomous EFL learning in authentic contexts

A learning activity supported by a mobile multimedia learning system (MMLS) was designed in this study. We aimed to test the effectiveness of the learning activity to enhance autonomous language learning in quasi-experimental Study 1 using a pretest/posttest design. Two groups participated in the learning activity: the students in a control group (n = 27) completed the activity using traditional approach whereas the students in an experimental group (n = 26) completed the activity using MMLS. The results of Study 1 showed that the experimental students outperformed their counterparts on the post-test (F = 29.602, p < 0.005, partial eta-squared = 0.372). In a non-experimental Study 2, the experimental students (n = 26) were assigned two learning tasks, the first task was completed individually and the second task in collaboration. We aimed to investigate which learning approach to complete tasks (i.e. individual vs. collaborative) enhances learning performance better by comparing students’ scores on two tasks. In addition, we explored students’ perceptions towards MMLS. The results of Study 2 showed that the students had better learning performance when they completed tasks in collaboration than individually. The results also showed that the students had high perceptions towards MMLS. Based on our results, we make suggestions and provide directions for future research.