Motivation for writing long online reviews: a big data analysis of an anime community

PurposeBased on self-determination theory (SDT), this study aims to determine the motivation factors of reviewers writing long reviews in the anime industry.Design/methodology/approachThis study analyzes 171,188 online review data collected from an online anime community (MyAnimeList.net).FindingsThe findings show that intensity of emotions, experience in writing reviews and helpful votes in past reviews are the most important factors and positively influence review length. The overall rating of the anime moderates the effects of some motivation factors. Moreover, reviewers commenting on their favorite or nonfavorite anime also have varied motivation factors. Furthermore, this study has addressed the p-value problem due to the large sample size.Research limitations/implicationsThis study provides a comprehensive and theoretical understanding of reviewers' motivation for writing long reviews.Practical implicationsOnline communities can incorporate the insights from this study into website design and motivate reviewers to write long reviews.Originality/valueMany past studies have investigated what reviews are more helpful. Review length is the most important factor of review helpfulness and positively affects it. However, few studies have examined the determinants of review length. This study attempts to address this issue.