English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

This article adds to the understanding of teachers' visual expertise bymeasuring visual information processing in real-world classrooms (mobileeye-tracking) with the newly introduced Gaze Relational Index (GRI) metric,which is defined as the ratio of mean fixation duration to mean fixationnumber. In addition, the aim was to provide a methodological contribution tofuture research by showing to what extent the selected configurations (i.e.varying velocity thresholds and fixation merging) of the eye movement eventdetection algorithm for detecting fixations and saccades influence the resultsof eye-tracking studies. Our study leads to two important take-home messages:First, by following a novice-expert paradigm (2 novice teachers & 2 experiencedteachers), we found that the GRI can serve as a sensitive measure of visualexpertise. As hypothesized, experienced teachers' GRI was lower, suggestingthat their more fine-graded organization of domain-specific knowledge allowsthem to fixate more rapidly and frequently in the classroom. Second, we foundthat the selected velocity threshold parameter alter and, in the worst case,bias the results of an eye-tracking study. Therefore, in the interest offurther generalizability of the results within visual expertise research, weemphasize that it is highly important to report configurations that arerelevant for the identification of eye movements.

Measuring Teachers' Visual Expertise Using the Gaze Relational Index Based on Real-world Eye-tracking Data and Varying Velocity Thresholds