As for what can trigger episodes in people, it almost always involves close interaction with another person. Usually, that other person is speaking to you in soft or deep tones, and always kindly. There’s usually also a component of adjacent sound coming from an inanimate object that, in conjunction with a person’s voice, helps trigger the episode. This can be the sound of scissor blades scraping together during a haircut, the sound of someone turning magazine pages, or, in my case, the sound of pennies sliding across concrete.
Same. I tend to do round scratches with my hand at the top of the head crown to intensify the tingles. And like one dude (https://www.reddit.com/r/asmr/comments/3lrmyx/question_what_exactly_is_the_brain_orgasm_of_asmr/), my toes curl and eyes roll up. Rubbing hands, palms and inner wrist to be exact, against something or against each other. Same with feet.
I experience both asmr and frisson so I am familiar with both. They are similar in that they both cause a tingling sensation. Asmr is triggered mainly by physical senses (sight, sound, sometimes smell) and produces a relaxing effect. Like you literally can fall asleep from it. Frisson is triggered by thought and emotion and produces an exciting effect.
However, Tony Ro, a professor of psychology and neuroscience at the City University of New York Graduate Center, said in an email that the University of Winnipeg study “is unfortunately not as revealing or informative as it could have been,” given its small size and the fact that researchers were measuring subjects at rest, rather than while experiencing ASMR. The resting state differences could be due to other factors, like higher rates of anxiety or depression, he says. Still, writes Ro, who researches synesthesia and has also been intrigued by ASMR for a few years, “I do think that ASMR may be a form of synesthesia.”
ASMR is usually precipitated by stimuli referred to as 'triggers'. ASMR triggers, which are most commonly auditory and visual, may be encountered through the interpersonal interactions of daily life. Additionally, ASMR is often triggered by exposure to specific audio and video. Such media may be specially made with the specific purpose of triggering ASMR or originally created for other purposes and later discovered to be effective as a trigger of the experience.