"Although the Big Five Inventory developed by John et al. (1991) excels in its brevity and efficiency, it lacks in its ability to measure more nuanced sub-facets of personality (McCrae and John, 1992). For example, it is possible that the highly significant differences seen between ASMR participants and controls on the Neuroticism domain of the BFI may instead be due to significant differences in the self-consciousness sub-facet of Neuroticism rather than negative affect, which is the primary characteristic of this domain. Further, the differences seen on the Conscientiousness, Extraversion, and Agreeableness domains may be better explained by results obtained from a personality questionnaire that employs a faceted framework (e.g., Costa and McCrae, 1992). However, despite its limitations, the BFI is an excellent first step in identifying how the “Big Five” personality characteristics relate to ASMR, and provides a stepping-stone for additional research on this condition."