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Halszka Jarodzka Thomas Balslev Kenneth Holmqvist Marcus Nystr?m Katharina Scheiter Peter Gerjets Berit Eika 《Instructional Science》2012,40(5):813-827
Complex perceptual tasks, like clinical reasoning based on visual observations of patients, require not only conceptual knowledge about diagnostic classes but also the skills to visually search for symptoms and interpret these observations. However, medical education so far has focused very little on how visual observation skills can be efficiently conveyed to novices. The current study applied a novel instructional method to teach these skills by showing the learners how an expert model visually searches and interprets symptoms (i.e., eye-movement modelling examples; EMMEs). Case videos of patients were verbally explained by a model (control condition) and presented to students. In the experimental conditions, the participants received a recording of the model’s eye movements superimposed on the case videos. The eye movements were displayed by either highlighting the features the model focused on with a circle (the circle condition) or by blurring the features the model did not focus on (the spotlight condition). Compared to the other two conditions, results show that a spotlight on the case videos better guides the students’ attention towards the relevant features. Moreover, when testing the students’ clinical reasoning skills with videos of new patient cases without any guidance, participants studying EMMEs with a spotlight showed improved their visual search and enhanced interpretation performance of the symptoms in contrast to participants in either the circle or the control condition. These findings show that a spotlight EMME can successfully convey clinical reasoning based on visual observations. 相似文献
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Halszka Jarodzka Katharina Scheiter Peter Gerjets Tamara van Gog 《Learning and Instruction》2010,20(2):146-154
Tasks with a complex, dynamic visual component require not only the acquisition of conceptual/procedural but also of perceptual/attentional skills. This study examined expertise differences in perceiving and interpreting complex, dynamic visual stimuli on a performance and on a process level, including perceptual and conceptual strategies. Performance, eye movement, and verbal report data were obtained from seven experts and 14 novices. Results show that experts compared to novices attend more to relevant aspects of the stimulus, use more heterogeneous task approaches, and use knowledge-based shortcuts. Implications for instructional design for the acquisition of perceptual skills are discussed. 相似文献
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Avoiding split attention in computer‐based testing: Is neglecting additional information facilitative? 
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下载免费PDF全文 Halszka Jarodzka Noortje Janssen Paul A. Kirschner Gijsbert Erkens 《British journal of educational technology : journal of the Council for Educational Technology》2015,46(4):803-817
This study investigated whether design guidelines for computer‐based learning can be applied to computer‐based testing (CBT). Twenty‐two students completed a CBT exam with half of the questions presented in a split‐screen format that was analogous to the original paper‐and‐pencil version and half in an integrated format. Results show that students attended to all information in the integrated format while ignoring information in the split format. Interestingly, and contrary to expectations, they worked more efficiently in the split format. A content analysis of the ignored information revealed that it was mostly not relevant to answering the questions, unnecessarily taxed students' cognitive capacity and inefficiently increased the mental effort they expended. Further comparisons of different mental effort measures indicate that mental effort had an explicit (ie, self‐reports, explicit utterances) and an implicit component (ie, silent pauses in thinking‐aloud, eye tracking parameters). Consequently, when designing CBT environments, not only the design of the tasks but also the content of the given information and their effect on the different aspects of mental effort must be considered. 相似文献
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Textbooks in applied mathematics often use graphs to explain the meaning of formulae, even though their benefit is still not fully explored. To test processes underlying this assumed multimedia effect we collected performance scores, eye movements, and think-aloud protocols from students solving problems in vector calculus with and without graphs. Results showed no overall multimedia effect, but instead an effect to confirm statements that were accompanied by graphs, irrespective of whether these statements were true or false. Eye movement and verbal data shed light on this surprising finding. Students looked proportionally less at the text and the problem statement when a graph was present. Moreover, they experienced more mental effort with the graph, as indicated by more silent pauses in thinking aloud. Hence, students actively processed the graphs. This, however, was not sufficient. Further analysis revealed that the more students looked at the statement, the better they performed. Thus, in the multimedia condition the graph drew students’ attention and cognitive capacities away from focusing on the statement. A good alternative strategy in the multimedia condition was to frequently look between graph and problem statement, and thus to integrate their information. In conclusion, graphs influence where students look and what they process, and may even mislead them into believing accompanying information. Thus, teachers and textbook designers should be very critical on when to use graphs and carefully consider how the graphs are integrated with other parts of the problem. 相似文献
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