OK. Well, I've read the paper now, and I find that I strongly disagree with a key component of Marken's methodology, and that I think this zeroes in on the cause of our argument here about what kind of experimental evidence counts for PCT. Frankly, though, I don't want to spend time arguing against it only for you to say "OK, maybe Marken is a crank, but that doesn't say anything against other PCT researchers". So if it's not too much trouble, could I ask you to read the (short) paper and tell me:

1. Are the methods in Section 4 and 5 standard for PCT research?
2. Do the results in Section 4 constitute evidence that control theory is a good model for prescription errors?

If the answer to either of these questions is "No", then we're just back where we started, with me asking for experimental evidence for PCT in a cognitive context. If the answer to both is "Yes", then I think I can explain my disagreement.