The document discusses retrospective pretests, which are used to measure learning and performance. A retrospective pretest asks participants to recall their behavior or knowledge before an intervention by having them rate themselves on a scale after the intervention has occurred. This helps address response-shift bias by distinguishing the pretest from the intervention. Retrospective pretests work well when participants don't know what they don't know, there is insufficient time for a traditional pretest, or no prior benchmarking was performed. They provide a more accurate measure of actual learning by drawing on a subject's memory of their pre-intervention state.