When she first felt it, she had no idea what it was. In kindergarten in central Russia, Maria and her friends would sometimes tickle each other gently, running their fingers over the skin of their forearms. For Maria, the experience was transcendent, sending a cascade of goosebumps over her head and down her back: “I would be left in a zombie-like state,” she says. “I would just be so relaxed.”
The most popular source of stimuli reported by subjects to be effective in triggering ASMR is video. Videos reported being effective in triggering ASMR fall into two categories, identified and named by the community as 'Intentional' and 'Unintentional'. Intentional media is created by those known within the community as 'ASMRtists' with the purpose of triggering ASMR in viewers and listeners. Unintentional media is that made for other purposes, often before attention was drawn to the phenomenon in 2007, but which some subjects discover to be effective in triggering ASMR. One early unintentional example is the Art Bears song 'The Bath of Stars.' Another example of unintentional media several journalists have noted is of famed painter Bob Ross. In episodes of his popular television series The Joy of Painting both broadcast and on YouTube, his soft, gentle speaking mannerisms and the sound of him painting and his tools trigger the effect on many of his viewers. The work of stop-motion filmmaker PES is also often noted.
Many of those who experience ASMR report that some specific non-vocal ambient noises are also effective triggers of ASMR, including those like the sound of rain, fingers scratching or tapping a surface, the crushing of eggshells, the crinkling and crumpling of a flexible material such as paper, or writing. Many YouTube videos that are intended to trigger ASMR responses capture a single person performing these actions and the sounds that result.