subperceptual
sub-perceptual

She smiled and said, pleasantly, "Your paper on the role of subperceptual influence in product placement was intriguing."

The topic was, interestingly enough, subperceptual influence and learning, and that explained in part why they wanted me.

She's the one who developed an entirely visual analytical method for detecting subperceptual reactions to physical stimuli.

What I could address, legitimately and fairly, were the difficulties in recognizing and assessing the impact of subperceptual influences.

There was no identifiable pattern to the subperceptual emanations coming from the bulky mass of armour, only the assurance that inside, someone or something was alive.

I parked in the same carpark as the day before and made my way to the Ritz, where, since the halls were empty, I sat in on the end of a very boring presentation on the implications of measurement of subperceptual learning.

Micro-dosing (or sub-perceptual dosing) means taking sub-threshold dose, which for LSD is 10-20 micrograms.