品牌提升测试的最短持续时间是多久？

Brand Lift Tests require a minimum duration of two weeks to gather sufficient data for statistically significant results. This timeframe allows for exposure to the advertising campaign and subsequent measurement of brand perception changes among the exposed and control groups. Shorter durations, such as "no minimum duration" or "a few days," would not provide enough time for the campaign to have a measurable impact or for reliable data collection. While longer durations like "thirty days" or "ninety days" are possible, two weeks is the established minimum for a valid test.