通过基于问卷调查的调研来衡量广告对消费者关于品牌态度及感知影响的方法称为什么？

Brand lift studies measure the impact of advertising on consumer perceptions and attitudes towards a brand, often using survey-based research. This directly aligns with the question's description of measuring ad impact on brand attitude and perception through questionnaires. Field surveys are a broad category of data collection, not specific to advertising impact. A/B testing compares two versions of an ad or webpage to see which performs better, typically focused on direct response metrics like clicks or conversions, not brand perception. Conversion lift studies measure the incremental increase in conversions attributable to an ad campaign, focusing on direct actions rather than brand sentiment.