March 25, 2018
March 25, 2018
March 27, 2018
This work seeks to illustrate the process of the research team in adapting an existing, valid, and reliable spatial ability instrument – the widely accepted Mental Cutting Test (MCT) – to assess spatial ability among a blind or visually-impaired population. To adapt the instrument, the team is developing 3-D models of existing MCT questions such that the target population may take the test by feeling the models with their hands. Each model is created by scaling up the MCT figures as seen when printed on paper. The 3-D models of all 25 items of the MCT are created using a solid modeling process followed by an additive 3-D printing process. The answer to each MCT question is the section view defined by a plane-of-interest (POI) intersecting the figure in question. The POI of each figure is identified by a thin plane extending from the prism. The answers will be presented as thin plane extrusions on top of a thin plate. The 3-D answer choices are based on a combination of scaling up the paper-printed test and acquiring accurate dimensions from a section view of the POI. In addition to the models, the team is developing a physical platform on which the test figures and the answers will be displayed to the test-takers in a consistent manner. To improve this adaptation of the MCT instrument, each 3-D model and the respective multiple-choice answers of the MCT test items will be inspected by a spatial cognition expert as well as three blind or visually-impaired professionals. Feedback from these individuals will provide insight into necessary revisions.
Ashby, T. J., & Goodridge, W. H., & Lopez, S. E., & Shaheen, N. L., & Call, B. J. (2018, March), Adaptation of the Mental Cutting Test for the Blind and Low Vision Paper presented at 2018 ASEE Zone IV Conference, Boulder, Colorado. https://strategy.asee.org/29599
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