Isn't that on-topic for skeptics.se?
(Maybe sadly) no. To quote the FAQ:
Skeptics - Stack Exchange is for challenging unreferenced notable claims, pseudoscience and biased results.
Skeptics is about applying skepticism — it is for researching the evidence behind claims you encounter. It is not for speculation, philosophical discussions or investigating original claims.
It is’t very explicit here but this does exclude questions about the function or way of working of various effects. This decision was initially made to limit the scope of the site and to prevent overlap with other sites such as Physics.SE and Biology.SE, since those sites are way better suited to answer such questions. The only thing on-topic on Skeptics.SE are therefore questions which target and examine specific claims in a rigorous fashion.
The “ideomotor effect” question in particular would probably be better suited on the Cognitive Sciences Stack Exchange.
Is there a way we can salvage the wording of the question to make it more on-topic?
To be honest, I can’t think of an elegant way. “Is the ideomotor effect real?” would be on topic but it would still be required to be notable: i.e. does anybody (notable) actually doubt that the effect exists? If that could be demonstrated, the question would be on topic.