Browsing by Subject "visual perception"

Now showing 1 - 3 of 3
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    Best Practices for Visual Processing Deficits in Early Intervention Identified Through Advancement of Clinical Skills and Dissemination of Information
    (2025) Brubaker, Zoe; Belkiewitz, Johhna; Department of Occupational Therapy, School of Health and Human Sciences; Daniel , Jessica
    Vision plays a critical role in a child’s learning and engagement with their environment, daily activities, and play. Occupational therapists contribute to visual processing in early intervention by addressing sensory processing through education, intervention, and collaboration. Research has shown that children with visual processing difficulties often experience developmental delays that affect their occupational performance. Barriers to identifying these difficulties include a lack of parental education on vision-specific skills and limited occupational therapy training on visual processing conditions, symptoms, treatment options, and referral processes. This capstone project involved collaboration with two sites to connect the expertise of teachers of blind and low-vision students with occupational therapy outreach in Indianapolis. The project aimed to educate caregivers and providers on visual processing in early intervention and foster relationships between organizations for improved collaboration. Results indicate that mentors were satisfied with the implemented handouts and recognized the value of making these resources accessible within the site’s virtual platform.
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    Graphical Perception of Continuous Quantitative Maps: the Effects of Spatial Frequency and Colormap Design
    (ACM, 2018) Reda, Khairi; Nalawade, Pratik; Ansah-Koi, Kate
    Continuous 'pseudocolor' maps visualize how a quantitative attribute varies smoothly over space. These maps are widely used by experts and lay citizens alike for communicating scientific and geographical data. A critical challenge for designers of these maps is selecting a color scheme that is both effective and aesthetically pleasing. Although there exist empirically grounded guidelines for color choice in segmented maps (e.g., choropleths), continuous maps are significantly understudied, and their color-coding guidelines are largely based on expert opinion and design heuristics--many of these guidelines have yet to be verified experimentally. We conducted a series of crowdsourced experiments to investigate how the perception of continuous maps is affected by colormap characteristics and spatial frequency (a measure of data complexity). We find that spatial frequency significantly impacts the effectiveness of color encodes, but the precise effect is task-dependent. While rainbow schemes afforded the highest accuracy in quantity estimation irrespective of spatial complexity, divergent colormaps significantly outperformed other schemes in tasks requiring the perception of high-frequency patterns. We interpret these results in relation to current practices and devise new and more granular guidelines for color mapping in continuous maps.
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    Surgeons see anatomical structures faster and more accurately compared to novices: Development of a pattern recognition skill assessment platform
    (Elsevier, 2018) Mizota, Tomoko; Anton, Nicholas E.; Stefanidis, Dimitrios; Surgery, School of Medicine
    Background This study aimed to identify differences in pattern recognition skill among individuals with varying surgical experience. Methods Participants reviewed laparoscopic cholecystectomy videos of various difficulty, and paused them when the cystic duct or artery was identified to outline each structure on the monitor. Time taken to identify each structure, accuracy and work load, which was assessed using the NASA-Task Load Index (TLX), were compared among the three groups. Results Ten students, ten residents and eight attendings participated in the study. Attendings identified the cystic duct and artery significantly faster and more accurately than students, and identified the cystic artery faster than residents. The NASA-TLX score of attendings was significantly lower than that of students and residents. Conclusions Attendings identified anatomical structures faster, more accurately, and with less effort than students or residents. This platform may be valuable for the assessment and teaching of pattern recognition skill to novice surgeons. Short summary Accurate anatomical recognition is paramount to proceeding safely in surgery. The assessment platform used in this study differentiated recognition skill among individuals with varing surgical experience.