Turns out half the sites personalized search results, based on who was searching.
结果显示，半数网站都会根据搜索对象对搜索结果进行个性化处理。
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Other algorithms are being developed that provide personalized learning experiences, much like Netflix’s personalized movie recommendations or Google’s personalized search results.
Personalized search refers to search experiences that are tailored specifically to an individual's interests by incorporating information about the individual beyond specific query provided. Pitkow et al. describe two general approaches to personalizing search results, one involving modifying the user’s query and the other re-ranking search results.