Abstract
Autonomous sensory meridian response (ASMR) is a sensory phenomenon commonly characterized by pleasant tingling sensations arising from the back of the head and accompanied by feelings of relaxation and calmness. Although research has found ASMR to have a distinct physiological pattern with increased skin conductance levels and reduced heart rate, the specific tingles felt in ASMR have not received much investigation. The aim of the present study was to investigate the physiology and characteristics of ASMR further by examining whether experiencing ASMR is visible from the pupil of the eye. A total of 91 participants were recruited and assigned to three different groups based on their experience of ASMR (ASMR vs. non-ASMR vs. unsure). Participants were instructed to watch a control video and an ASMR video and to report any tingling sensations by pressing down a button on the keyboard. Pupil diameter was measured over the duration of both videos using a tower-mounted eye tracker. Data was analyzed on a general level, averaging pupil diameter over each video, as well as on a more specific level, comparing pupil diameter during reported episodes of tingling sensations to pupil diameter outside of those episodes. On the general level, results revealed no significant differences between the groups. On the specific level, however, the tingling sensations experienced in ASMR were found to cause statistically significant increases in pupil diameter, demonstrating that they have a physiological basis. The results of the study further reinforce the credibility of ASMR and suggest that the tingles felt in ASMR are at the very core of the experience itself.
Highlights
Autonomous sensory meridian response (ASMR) refers to a sensory phenomenon that has received a large amount of popular attention over the past few years
Upon examination of the data around these periods, we noticed that the velocity of pupil diameter change was greatly increased in their immediate proximity, likely representing measurement error during the closing and opening of the recorded eye
In attempt to remove these instances of high velocity pupil change, the periods of missing data were expanded on both sides, meaning that four samples of data both before and after each missing data point were removed
Summary
Autonomous sensory meridian response (ASMR) refers to a sensory phenomenon that has received a large amount of popular attention over the past few years. When browsing internet sites like YouTube, it is hard to not come by the term ASMR; according to Ahrefs, it is currently the 8th most common keyword searched on YouTube worldwide (as of February 2019) [2]. Both anecdotal reports and various studies have suggested that ASMR can have multiple benefits, ranging from mood improvement to temporary relief of physical pain [1, 3], indicating that it could potentially be used as a therapeutic tool
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