We study how the ratings people receive on online labor platforms are influenced by their performance, gender, their rater's gender, and displayed ratings from other raters. We conducted a deception ...study in which participants collaborated on a task with a pair of simulated workers, who varied in gender and performance level, and then rated their performance. When the performance of paired workers was similar, low-performing females were rated lower than their male counterparts. Where there was a clear performance difference between paired workers, low-performing females were preferred over a similarly-performing male peer. Furthermore, displaying an average rating from other raters made ratings more extreme, resulting in high performing workers receiving significantly higher ratings and low performers lower ratings compared to when average ratings were absent. This work contributes an empirical understanding of when biases in ratings manifest, and offers recommendations for how online work platforms can counter these biases.
The present study analyzed heterotypic schooling behavior and protective mimicry relationships involving species of the genus Haemulon and other coral reef fishes on coastal reefs at Tamandaré, ...Pernambuco State, Northeastern Brazil. The work was performed during 35 hours of direct observation using the "focal animal" method. The observed events involved 14 species of reef fish in eight different families. The phenomenon of mixed schooling appeared to be related to the large number of individuals of the genus Haemulon present in reef environments and to the tendency of individuals with limited populations to try to aggregate in schools (e.g. genus Scarus).
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