Its not an explicit form of Primacy of Consciousness like prayer or wishing. Its implicit in QM and its basic premises. One example of an implicit form of PoC is to project properties or aspects of consciousness onto reality and treating them as metaphysical and not epistemological factors. I think the ancient philosophers got hung up on this when debating whether a color like "red" was in the object or subject. This went round and round for a few hundred years until someone pointed out that its both (form/object distinction).

Jaynes covers similar idea in his book and articles where he ascribes this error to traditional frequentists who hold probabilities as a property of things (a metaphysical concept) instead of a measure or property of our lack of knowledge (an epistemological, bayesian concept). Moreover, committing the PoC error will lead you to supernaturalism eventually so MWI is just a logical outcome of that error.