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Since the broad diffusion of Computer-Assisted survey tools (i.e. web surveys), a lively debate about innovative scales of measure arose among social scientists and practitioners. Implications are relevant for applied Statistics and evaluation research since while traditional scales collect ordinal observations, data from sliders can be interpreted as continuous. Literature, however, report excessive times of completion of the task from sliders in web surveys. This experimental protocol is aimed at testing hypotheses on the accuracy in prediction and dispersion of estimates from anonymous participants who are recruited online and randomly assigned into tasks in recognition of shades of colour. The treatment variable is two scales: a traditional multipoint 0-10 multipoint vs a slider 0-100. Shades have a unique parametrisation (true value) and participants have to guess the true value through the scale. These tasks are designed to recreate situations of uncertainty among participants while minimizing the subjective component of a perceptual assessment and maximizing information about scale-driven differences and biases. We propose to test statistical differences in the treatment variable: (i) mean absolute error from the true value (ii), time of completion of the task. To correct biases due to the variance in the number of completed tasks among participants, data about participants can be collected through both pre-tasks acceptance of web cookies and post-tasks explicit questions.
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Slides (Photography) --- Projectors --- Lantern projection --- History
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Library management --- Libraries --- -Documentation --- Public institutions --- Librarians --- Special collections --- -Slides (Photography) --- -Special collections --- Documentation --- Slides (Photography) --- Great Britain --- Libraries - Great Britain - Special collections - Slides (Photography)
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Slides (Photography) --- Visual aids --- Word processing --- Standards. --- United States.
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Art and photography --- Art --- Slides (Photography) --- Photographs --- Slides
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Slides for the magic or optical lantern were a major tool for knowledge transfer in the second half of the 19th and early 20th centuries. Schools, universities, the church and many public and private institutions all over the world relied on the lantern for illustrated lectures and demonstrations. This volume brings together scholarly research on the educational uses of the optical lantern in different disciplines by international specialists, representing the state of the art of magic lantern research today. In addition, it contains a lab section with contributions by archivists and curators and performers reflecting on ways to preserve, present and re-use this immensely rich cultural heritage today.
Lantern slides --- History --- Educational aspects. --- Conservation and restoration. --- Photography in education --- Slides (Photography) --- History. --- Photography in education - History. --- Slides (Photography) - History
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Visual education --- Visual education. --- Education, Visual --- Visual instruction --- Object-teaching --- Audio-visual education --- Slides (Photography) --- Visual aids
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Visual education --- Programmed instruction. --- Education, Visual --- Visual instruction --- Object-teaching --- Audio-visual education --- Slides (Photography) --- Visual aids --- Programmed instruction
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