Sentence:  The psychologist Gustav T. Fechner once introduced the idea of stimuli that are so weak that they are subliminal; they remain below the threshold of our perception and consciousness. Anders suggests that we must consider the opposite also, namely, stimuli that are absolutely too strong to be registered by our perception and imagination, stimuli that are <WSD>superliminal</WSD>. These can influence our behavior, passively and actively. 
Meaning of the word marked with <WSD> tags:  Of, pertaining to, or involving a supposed kind of awareness which is above and beyond the experiential range of normal consciousness.