Net Promoter Score

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The food delivery market has been growing significantly over the past five years. That growth exploded in the United States from $17 billion in 2018 to $26 billion in 2020 (partly due to COVID-19). This market is highly competitive and has ultra-thin profit margins. Technologies such as route optimization enable faster and cheaper delivery, but dissatisfied customers can easily switch providers. Service providers that don’t

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Sample size estimation is a critical step in research planning. It can also seem like a mysterious and at times controversial process. But sample size estimation, when done correctly, is based mostly on math, not magic. The challenge is that the math can get complex, so it becomes easier to defer to simple rules or a one-size-fits-all number. Before 2016, there was no well-defined method

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The Net Promoter Score (NPS) is widely used by organizations. It’s often used to make high-stakes decisions on whether a brand, product, or service has improved or declined. Net Promoter Scores are often tracked on dashboards, and any changes (for better or worse) can have significant consequences: adding or removing features, redirecting budgets, even impacting employee bonuses. Random sampling error, however, can often explain many

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When we wrote Quantifying the User Experience, we put confidence intervals before tests of statistical significance. We generally find fluency with confidence intervals to be easier to achieve and of more value than with formal hypothesis testing. We also teach confidence intervals in our workshops on statistical methods. Most people, even non-researchers, have been exposed to the concept of margins of error—political polls include them.

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Fifteen minutes could save you 15%. Nationwide is on your side. You’re in good hands with Allstate. Auto insurance commercials are ubiquitous. It’s no wonder, considering the market. In 2020, the population of the United States was 331,000,000, and 230,000,000 Americans were licensed drivers. If you drive, you should have auto insurance. Until recently, most customer interactions with an auto insurance company were through its

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The Net Promoter Score (NPS) is a popular business metric used to track customer loyalty. It uses a single likelihood-to-recommend (LTR) question (“How likely is it that you will recommend our company to a friend or colleague?”) with 11 scale steps from 0 (Not at all likely) to 10 (Extremely likely). In NPS terminology, respondents who select 9 or 10 on the LTR question are

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Despite the ease with which you can create surveys using software like our MUIQ platform, selecting specific questions and response options can be a bit more involved. Most surveys contain a mix of closed-ended (often rating scales) and open-ended questions. We’ve previously discussed 15 types of common rating scales and have published numerous articles  in which we investigated their measurement properties. Now we turn our

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The Net Promoter Score (NPS) is a widely used metric, but it can be tricky to work with statistically. One of the first statistical steps we recommend that researchers take is to add confidence intervals around their metrics. Confidence intervals provide a good visualization of how precise estimates from samples are. They are particularly helpful in longitudinal research to help differentiate the inevitable fluctuations in

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The COVID-19 pandemic has led to significant changes in how people have vacationed in 2020. To get away from it all without spending time in crowded places, vacationers have turned to vacation rental websites and have planned longer stays. For example, Airbnb recently reported a year-to-year doubling of long-term (>28 days) rentals and a shift from urban to rural stays. These changes make sense given

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Software dominates our professional and personal lives. A product's usability, in addition to its features and capabilities, is an important influence on how likely users are to adopt new technology and recommend the software. Between 30 and 60% of the variation in Net Promoter Scores is determined by a product's usability. Customers tend to recommend products they have positive experiences with. Similarly, bad experiences lead customers

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