WHAT IS RAPID VALIDATION AND HOW IS IT DIFFERENT FROM A/B TESTING?

Summary from the TLDR Marketing newsletter

While A/B testing is incredible in its fullest application, tests can take a long time to complete, depending on their complexities. This post suggests using rapid prototyping as an alternative. This involves creating low-fidelity models to test and gain early feedback. Examples include first-click testing, tree testing, preference testing, 5-second testing, and design surveys.