Which preposition to use with supernormal

as Occurrences 1%

Besides this, it must be allowed that together with the normal phenomena of dreaming, there are abnormal dreams which even to cultivated minds seem at times as supernormal as second-sight or prophecy.

at Occurrences 1%

This is very much the way she is dealing with the supernormal at present; brushing aside as wholly nonsensical, beliefs that envelope a core of useful fact in a wrapping of crude explanation, and then receiving the same facts as new discoveries, because she has fitted them into an involucre more to her own liking, though perhaps but little less crude.

in Occurrences 1%

Isolated labor if on exceptionally fertile soil or if equipped with specially efficient apparatus or if supernormal in energy may produce a surplus income, but ordinarily it can earn no more than a bare subsistence.

to Occurrences 1%

We shall now endeavour to make it probable that Fetishism (the belief in the souls tenanting inanimate objects) may also have sources which perhaps are not normal, or which at all events seemed supernormal to savages.

Which preposition to use with  supernormal