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71.
Testa and Ternes have proposed that the degree of spatial contiguity between a cue and a food object is an important determinant of the associability of that cue with toxicosis. We found, in accord with the Testa and Ternes hypothesis, that rats showed more profound illness-based aversions to the visual properties of food objects than to the visual properties of food bins or feeding chambers. This result has implications for the design of experiments undertaken to determine the relative associability of cues in different sensory modalities with toxicosis. 相似文献
72.
This paper reviews empirical literature on how people use documents to perform tasks. We examine studies that have been published under the topics of: following written directions, reading maps, following instructions, using job performance aids, and processing procedural texts. Documents that contain a procedure, such as a set of directions, require transformation of information. Such transformation frequently requires converting a procedure represented verbally in a text into a procedure represented behaviorally in a performance. To accomplish this transformation, we propose that students must: (a) form a conceptual model of the performance; (b) encode procedures from the document; (c) engage in self-testing; and (d) conduct self-corrections to repair mistakes. We further propose that these operations are performed most efficiently with distinctive information resources. An overview of the task is likely to be most effective in facilitating conceptual model formation. Procedural information that emphasizes temporal characteristics of the performance will facilitate the encoding of procedures. A representation of the outcome (usually graphic) improves self-testing, and the comparison of the outcome with progress in the workspace leads to most effective self-correction. This process-resource interaction minimizes the number and complexity of transformations required to process procedural documents. 相似文献
73.
Linda Lohr Manisha Javeri Chris Mahoney Jim Gall Kathy Li Dawn Strongin 《Educational technology research and development : ETR & D》2003,51(2):41-55
The aim of this research was to examine the use of a rapid application development (RAD) approach in improving the usability
(effectiveness, efficiency, and appeal) of instructional materials for preservice teachers. The RAD approach used was the
analysis, synthesis, evaluation and change (ASEC) model (Reigeluth & Nelson, 1997). After examining existing materials, 11
units of instruction were prototyped, tested, modified, and retested with the requisite changes being implemented over the
course of three semesters. Qualitative and quantitative data were collected from 570 students, 7 instructional designers,
and 4 lab assistants. Results of the study showed significant increases in usability scores between the second and third semester.
Both positive and negative experiences in using a rapid development model are discussed. 相似文献
74.
We examined the basis of feeling-of-knowing judgments (FOK) in patients with schizophrenia. Such patients typically have impaired memory and awareness, but not metamemory-accuracy deficits. The magnitude of FOKs are lower for patients with schizophrenia than for healthy participants, but judgments equally predict memory performance. In healthy participants, FOK is based on accessible information, including retrieval of partial-target (e.g., retrieving the first letter) and contextual information (e.g., related facts). In Experiment 1, we examined if accessible information predicts FOKs for episodic memory in patients with schizophrenia. Patients and healthy controls learned names paired with drawings of imaginary animals. The results showed that patients’ FOK increased with the retrieval of partial-target and contextual information. In Experiment 2, using semantic-memory general-information questions, accessible partial-target information predicted FOKs in patients with schizophrenia. The accessibility model of FOK applies to patients with schizophrenia, and it is important to determine what occurs in other memory-impaired populations. 相似文献
75.
We study the effects of homeschool background and time use on academic performance among students at Patrick Henry College, a private religious institution with a 63-credit core classical liberal arts curriculum. Using ordinary least squares regression analysis, we examine four research questions: (1) Does time use influence academic performance? (2) Do homeschooled students perform differently than traditionally schooled students? (3) Does parental education moderate the impact of homeschooling on academic performance? (4) Does homeschooling moderate the impact of ACT scores on academic performance? 相似文献
76.
77.
In this study, we worked with second-year engineering students at an Australian university to examine previously identified threshold concepts within the theoretical framework of Possible Selves. Using workshops as the context for intensive work with students, students were encouraged to consider their future lives and work, including their engineering fears, expectations, and aspirations. The findings revealed many students to have a poor understanding of the realities of engineering work. Moreover, perceived gaps between self-efficacy and the requirements of engineering work appeared to be motivating if students deemed it possible to reduce the gap, but demotivating if they identified a characteristic over which there was perceived to be no control. The study suggests that these engineering students needed more opportunities to explore both the roles of engineers and their own possible selves. Overall, the findings indicate that higher education students may need encouragement and support to explore potential future roles, and they strengthen calls for further research in this area. 相似文献
78.
Positive Youth Development Among Diverse Racial–Ethnic Children: Quality Afterschool Contexts as Developmental Assets
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Positive youth development (PYD) deserves more empirical attention, particularly among children of diverse racial–ethnic backgrounds. Given the need among families for monitoring and supervision during out‐of‐school time, community‐based afterschool is a potentially promotive ecological setting. This study explores the quality of afterschool experiences upon PYD. This multimethod study includes over 500 elementary school children in Grades 2–5 (Mage = 8.80, SD = 1.12). The sample comprises of 49% White, 27% African American, 7% Latino, and 17% mixed race/others with 45% free/reduced lunch eligible children. In multilevel models, independently observed quality across time positively impacted competence, connection, caring for all youth, and cultural values for racial–ethnic minority youth. Afterschool fosters PYD, including sociocultural dimensions, when comprised of appropriately structured, supportive, and engaging interactions. 相似文献
79.
80.
Kathryn Ley Dawn B. Young 《Educational technology research and development : ETR & D》2001,49(2):93-103
The purpose of this article is to suggest principles for embedding support in instruction to facilitate self-regulation (SR)
in less expert learners. The principles are based on an analysis of the growing body of research on the distinctive self-regulation
differences between higher and lower achieving learners. The analysis revealed four instructional principles that designers
should consider to provide support for self-regulation. Each principle is supported by research and instructional examples
are included. 相似文献