Training can improve the accuracy of judgements of solvability

We show that the accuracy of initial metacognitive judgements about problem solvability improves with training. Participants attempted to discriminate solvable from unsolvable anagrams. In a no-training condition, anagram presentation duration was 2 s in each of four blocks. In a training condition, anagram presentation duration started at 16 s and decreased by half to 2 s by the final block. Training led to more discriminating judgements of solvability in the final block. This pattern held when anagrams that participants had solved during the judgement task were excluded. Thus, rapid, intuitive judgements of solvability can benefit from long-to-short duration training.