A/B testing, also known as split testing or bucket testing, is a research method to gain statistical insight into user preferences. In an A/B test, you create two versions of a user interface and run a randomized test.

The AARRR Pirate Metrics Framework is a popular way to measure the success of a user experience. The Pirate Metric acronym stands for Acquisition, Activation, Retention, Referral, and Revenue, and is dubbed the "pirate" framework for the similarity to a pirate's "arrr matey". Each of these metrics can help you track the progress of your user experience and determine whether or not it is successful.

Analytics is a core quantitative tool that informs other UX research methods. Specifically UX or Experience Analytics. UX Analytics measures user activity with a focus on analyzing the user journey over marketing focused metrics.

Behavioral studies observe what actions research participants take to accomplish tasks and meet their needs.

Card sorting is a user experience research technique used to help understand how users categorize information.

Mixed methods research is a research approach that combines both quantitative and qualitative research methods to gain a more comprehensive understanding of a research question or phenomenon.

Quantitative research focuses on how people behave and what actions they take through the gathering and analysis of data.

The System Usability Scale (SUS) is a widely-used tool in the field of user experience (UX) design that helps measure the subjective assessment of usability in a system.

Tree testing is an important usability technique that all user researchers should be familiar with. By creating a task list, site map, and recruiting test participants, you can conduct your own tree test and make necessary changes to improve the findability of topics on your website.