Always generous when describing others, Paul Kirschner discusses "another worthless article presenting and then solving a non-existent problem." The article in question is Wesley Pyke, Johan Lunau and Amir-Homayoun Javadi's Does difficulty moderate learning? It rankles Kirschner for two reasons: one is that "increasing difficulty (thus relative effort) during retrieval-based learning can help achieve superior long-term retention," which seems contrary to Cognitive Load Theory (CLT); and the second is that it references perceptual Load Theory (PLT), which offers an alternative explanation to that provided by CLT. Kirschner complains, "there's no conflict between the two and that they fit together like a hand in a glove," once again demonstrating CLT's extraordinary flexibility in the face of conflicting data.
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