normalize_gaze_coords

Transforms raw gaze coordinates (in pixels) to normalized coordinates where:<ul>
<li>(0,0) represents the center of the screen</li>
<li>Coordinates are scaled to [-1,1] range</li>
<li>Also calculates the normalized distance from screen center</li>
</ul>

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Pupillometry offers a non-invasive window into the mind and has been used extensively as a psychophysiological readout of arousal signals linked with cognitive processes like attention, stress, and emotional states [Clewett et al. (2020) <doi:10.1038/s41467-020-17851-9>; Kret & Sjak-Shie (2018) <doi:10.3758/s13428-018-1075-y>; Strauch (2024) <doi:10.1016/j.tins.2024.06.002>]. Yet, despite decades of pupillometry research, many established packages and workflows to date lack design patterns based on Findability, Accessibility, Interoperability, and Reusability (FAIR) principles [see Wilkinson et al. (2016) <doi:10.1038/sdata.2016.18>]. 'eyeris' provides a modular, performant, and extensible preprocessing framework for pupillometry data with BIDS-like organization and interactive output reports [Esteban et al. (2019) <doi:10.1038/s41592-018-0235-4>; Gorgolewski et al. (2016) <doi:10.1038/sdata.2016.44>]. Development was supported, in part, by the Stanford Wu Tsai Human Performance Alliance, Stanford Ric Weiland Graduate Fellowship, Stanford Center for Mind, Brain, Computation and Technology, NIH National Institute on Aging Grants (R01-AG065255, R01-AG079345), NSF GRFP (DGE-2146755), McKnight Brain Research Foundation Clinical Translational Research Scholarship in Cognitive Aging and Age-Related Memory Loss, American Brain Foundation, and the American Academy of Neurology.

Shawn Schwartz

eyeris

Flexible, Extensible, & Reproducible Pupillometry Preprocessing

normalize_gaze_coords function

<dl><dt>pupil_df</dt>
<dd>A data frame containing raw gaze
coordinates (<code>eye_x</code>, <code>eye_y</code>)</dd>
<dt>screen_width</dt>
<dd>The screen width in pixels</dd>
<dt>screen_height</dt>
<dd>The screen height in pixels</dd></dl>

Arguments

Normalize gaze coordinates to screen-relative units — normalize_gaze_coords

<dl>

<dt>pupil_df</dt>
<dd>A data frame containing raw gaze
coordinates (<code>eye_x</code>, <code>eye_y</code>)</dd>


<dt>screen_width</dt>
<dd>The screen width in pixels</dd>


<dt>screen_height</dt>
<dd>The screen height in pixels</dd>

</dl>

normalize_gaze_coords: Normalize gaze coordinates to screen-relative units

Description

Usage

Value

Arguments