Need numerical data about your product’s UX, but not sure where to start? Check out this list of the most popular quantitative methods to help you pick a tool.| Nielsen Norman Group
Number fetishism leads usability studies astray by focusing on statistical analyses that are often false, biased, misleading, or overly narrow. Better to emphasize insights and qualitative research.| Nielsen Norman Group
The answer is 5, except when it's not. Most arguments for using more test participants are wrong, but some tests should be bigger and some smaller.| Nielsen Norman Group