The note-taking traveller is very apt to forget that the mere act of note-taking upsets his normal perceptivity.
"America To-day, Observations and Reflections"
William Archer
But now his eyelids were only drooping like the brim above them; in the broad light of their abnormal perceptivity, it was as if his own eyes threw a dreadful halo round the figure they beheld.
"The Crime Doctor"
Ernest William Hornung
I could take no credit for my perceptivity since everyone in San Diego knew as well as I that this was no duplicate freak, but the same, the identical, the fearsome grass.
"Greener Than You Think"
Ward Moore