16. One or more tangible, non-transitory computer-readable media storing computer-readable instructions that when executed by one or more processors cause the one or more processors to perform operations, the operations comprising: accessing a review of a product or service provided by a reviewer in an online review platform; accessing reviewer generated content provided by the reviewer, the reviewer generated content comprising information about the product or service posted in a social media platform outside of the review platform; analyzing the reviewer generated content to extract product review data; matching the product review data with the review provided by the reviewer in the online review platform; and determining a quality score for the review based on the product review data extracted from the reviewer generated content, the quality score providing a measure of a degree of consistency between a sentiment associated with the product review data extracted from the reviewer generated content and a sentiment associate with the review.
16. One or more tangible, non-transitory computer-readable media storing computer-readable instructions that when executed by one or more processors cause the one or more processors to perform operations, the operations comprising: accessing a review of a product or service provided by a reviewer in an online review platform; accessing reviewer generated content provided by the reviewer, the reviewer generated content comprising information about the product or service posted in a social media platform outside of the review platform; analyzing the reviewer generated content to extract product review data; matching the product review data with the review provided by the reviewer in the online review platform; and determining a quality score for the review based on the product review data extracted from the reviewer generated content, the quality score providing a measure of a degree of consistency between a sentiment associated with the product review data extracted from the reviewer generated content and a sentiment associate with the review. 18. The one or more tangible, non-transitory computer-readable media of claim 16 , wherein the operation of determining a quality score for the review based on the product review data extracted from the social media platform comprises: determining a first sentiment score for the review, the first sentiment score indicative of a type and a magnitude of a sentiment expressed in the review; determining a second sentiment score for the product review data, the second sentiment score indicative of a type and a magnitude of a sentiment expression in the product review data; and determining the quality score based at least in part on the first sentiment score and the second sentiment score.