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Anne Collins McLaughlin Wendy A. Rogers Edmundo A. Sierra Jr Arthur D. Fisk 《Learning, Media and Technology》2007,32(4):381-405
Task instruction may be presented in many forms. However, training system designers are often forced to depend on intuition when choosing a presentation medium. Though past research has investigated the effectiveness of instructional media types, results have been mixed with no clear recommendations of which medium to use for instruction. An organizational framework for matching the appropriate medium or media to a learning situation is necessary for progress to occur in this research area. Through three experiments, we investigated the attributes of audio and video as instructional media, identified tasks for which we might predict the most beneficial instructional media, and tested our proposed organizational framework by manipulating the difficulty of the task and the complexity of the instructions. Older and younger adults participated in the experiments to help us understand differences in training needs for varying cognitive and perceptual abilities. We provide the basis for a taxonomy of instructional media and task demands, to be added through further research. 相似文献
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Rivers Michelle L. Fitzsimmons Charles J. Fisk Susan R. Dunlosky John Thompson Clarissa A. 《Metacognition and Learning》2021,16(1):157-178
Metacognition and Learning - Prior research has found gender differences in spatial tasks in which men perform better, and are more confident, than women. Do gender differences also occur in... 相似文献
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This article explores the role of state education agencies in three states that have embarked on ambitious kindergarten through Grade 12 (K–12) virtual learning initiatives: Alabama, Florida, and Idaho. Subject to a rapidly changing environment influenced by factors beyond the jurisdiction of many state departments of education, the world of virtual K–12 education is relatively unregulated and fluid. Case studies describing the virtual learning initiatives of several states suggest that few, if any, state education agencies are currently equipped to regulate the rapidly growing number of independent for-profit and nonprofit organizations delivering online learning options. 相似文献
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Tunable resistive pulse sensing (TRPS) experiments have been used to quantitatively study the motion of 1 μm superparamagnetic beads in a variable magnetic field. Closed-form theory has been developed to interpret the experiments, incorporating six particle transport mechanisms which depend on particle position in and near a conical pore. For our experiments, calculations indicate that pressure-driven flow dominates electrophoresis and magnetism by a factor of ∼100 in the narrowest part of the pore, but that magnetic force should dominate further than ∼1 mm from the membrane. As expected, the observed resistive pulse rate falls as the magnet is moved closer to the pore, while the increase in pulse duration suggests that trajectories in the half space adjacent to the pore opening are important. Aggregation was not observed, consistent with the high hydrodynamic shear near the pore constriction and the high magnetization of aggregates. The theoretical approach is also used to calculate the relative importance of transport mechanisms over a range of geometries and experimental conditions extending well beyond our own experiments. TRPS is emerging as a versatile form of resistive pulse sensing, while magnetic beads are widely used in biotechnology and sensing applications. 相似文献
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