Yelp reviews tend toward very positive or very negative extremes, while Glassdoor reviews gravitate toward the center of the distribution with fewer extremely positive or negative ratings. In a study comparing 25 online platforms by the percentage of extreme reviews, 21 platforms were more polarized than Glassdoor.

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A common concern with online reviews is that they can skew toward a polarized distribution, with many glowing reviews, a disproportionate number of extremely negative reviews, and relatively few moderate opinions. This pattern is documented across settings such as Amazon products and Yelp restaurants, and it occurs when users with extremely positive or extremely negative views are especially motivated to write reviews.

Polarization Risk in Online Reviews

MIT Sloan Management Review project page on measuring culture in leading companies, including the Culture 500 dataset. https://sloanreview.mit.edu/projects/measuring-culture-in-leading-companies/

MIT Sloan Management Review

Yelp Versus Glassdoor Review Polarization

Glassdoor minimizes review polarization through user policies designed to promote honest and representative reviews, creating a more equal and representative distribution of user ratings.

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