Interleaved Practice for Long-Term Certification Exam Retention

Doug Rohrer's interleaving research points to a consistent mechanism: mixing problem types trains the ability to discriminate among them and select the appropriate solution strategy for each, rather than simply recognizing a method that was just demonstrated. This discrimination skill is the core challenge of applied certification exams, where recognizing which concept applies to the current scenario matters as much as knowing the concepts in isolation. | Research shows interleaved practice produces meaningfully better long-term retention and significantly better ability to discriminate between concepts -- which is exactly what certification scenario questions require.