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. 2020 Aug 20;10:292. doi: 10.1038/s41398-020-00887-2

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© The Author(s) 2020

Open Access This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — a Physiological arousal, measured with event-related SCRs, decreased for both fear-relevant and neutral cues, but decreases were greater for fear relevant cues, indicated by a highly significant stimulus by time interaction. Subjects showed higher SCRs to fear relevant cues compared to neutral cues during early but not late trials of repeated exposure. Points and error-bars denote means and SEMs. b There was no significant relationship between decreases in physiological arousal to fear-relevant cues and approach behavior. The scatter plot shows the association between decreases in SCR (spiders: early>late) and approach behavior at the 24-h time point.