Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2020 Jan 28;82(5):2482–2501. doi: 10.3758/s13414-019-01952-9

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2019

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Fig. 5 — Measures of observers’ gaze behavior to people in rounds 1 and 2. Box and whisker plots indicate the relative total fixation duration to people (sum of fixations to the group, head and body) for each round. Medians are indicated by the vertical bars. Boxes cover the 25th to 75th percentiles (inter-quartile range; IQR). Whiskers extend from the 25th and 75th percentile to cover all participant data lying within 1.5 times the IQR from the 25th and 75th percentile, respectively. Any participant data lying outside this range is identified by an open circle. Relative total fixation duration is estimated according to two methods. The top panel depicts the lower-limit estimate of relative total fixation duration to people, which was calculated by dividing the sum of total fixation durations to the group, body, and head AOIs by the total time that people were in view in the scene camera video. The latter was determined as the time between a group entering the scene camera video and the last person of a group leaving the scene camera video. This is considered a lower limit estimate, as a relative total fixation duration of 1 can only be obtained by one continuous fixation on a group for the entire duration it is in view. However, the eye-tracking data also contains fast phases (saccades) and/or data loss. As such, another estimate was also calculated. The bottom panel depicts the upper-limit estimate of relative total fixation duration to people, calculated by dividing the total fixation durations to the group, body, and head AOIs by an estimated maximum time people could be looked at. This estimated maximum time was calculated by first determining the proportion of eye-tracking data that contained fixations, compared to fast phases and/or data loss for the entire eye-tracking recording. This proportion was then multiplied by the total time people were in view in the scene camera video. If for example people are in view for 50 s, and the proportion of eye-tracking data that contained fixations was 0.8, the estimated maximum time people could be looked at was 40 s