Austen Smith

Permanent URI for this collectionhttps://hdl.handle.net/10294/15056

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Browsing Austen Smith by Author "Friedrich, Trista, E."

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    Native reading direction influences lateral biases in the perception of shape from shading
    (Taylor & Francis, 2014-12-24) Smith, Austen, K.; Szelest, Izabela; Friedrich, Trista, E.; Elias, Lorin, J.
    Although neurologically normal individuals often exhibit leftward biases of perception and attention, known as pseudoneglect, factors such as lighting, spatial location and native reading direction have been found to modulate these biases. To investigate lighting and spatial biases in left-to-right and right-to-left readers search times were measured in a target finding task where lighting and target locations were manipulated. Target search times under upper-left lighting were significantly shorter than lower-left, upper-right and lower-right lighting among left-to-right readers. Right-to-left readers did not display the same leftward bias, even displaying significantly shorter search times under upper-right lighting than those of left-to-right readers. Significantly shorter search times for targets located in the upper-left quadrant (compared to other quadrants) were observed for left-to-right readers, while search times for upper-right located targets were significantly shorter for right-to-left readers compared to those of left-to-right readers. Participant scan times of stimuli divided into equal quadrants were monitored by an eye-tracking camera. Both groups displayed greater scan times in upper quadrants. These findings suggest that native reading direction modulates spatial and light perception biases resulting in weaker leftward, or a lack of lateral biases among right-to-left readers.
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    Proof of concept for a multi-method approach to evaluate the usability of websites with public health content: The case of Alzheimer association websites
    (Canadian Psychological Association, 2022-10-06) Friedrich, Trista, E.; Smith, Austen, K.; Hunter, Paulette, V.
    Methods for assessing usability are advancing rapidly, and include think-aloud protocols, objective measures such as task timing, and ultra-sensitive measures such as eye tracking and page recording. In this study, we provide proof-of-concept for the new, combined use of these three types of measures within a quasi-experimental paradigm focused on a question relevant to public health. The quasi-experiment specifically involved assessing the usability of four English-language Alzheimer websites from around the world (USA, UK, Ireland, Canada), all of which contained information about cognitive health. Participants completed two tasks; one requiring them to identify strategies to prevent dementia and another requiring them to locate a definition of Alzheimer’s disease. We hypothesized that the websites would have superior usability for the former task and inferior usability for the latter task. We also hypothesized positive correlations among eye tracking measures, simpler performance measures (e.g., task completion time), and subjective usability measures. We found that the new quasi-experimental protocol facilitated comparison of tasks and websites. It also facilitated interpretation by permitting comparison across measures. Overall, this study provides proof of concept for the use of this multi-method approach to evaluate the usability of websites. It also provides information that could potentially be used to advance further pilot or experimental hypothesis testing on this topic.