Consider: is a dark night an ideal condition for perception?
Comparing the elements of the correlation matrix in the before condition for perceptions of the different sound sources and its effects, we conclude that the scraping and screeching sounds play a prominent role, with significant associations for angry reaction, coping and symptoms.
We lack a relevant vocabulary, he argues, because we cannot construct any simple correlation between a range of "stimulus conditions" for mystical perception and the kinds of experience which are likely to arise under those conditions.
This difficulty in identifying the stimulus conditions for mystical perception in no way impugns its epistemic worth, Alston thinks, because God is said to be a personal reality, and an experience of God's presence therefore cannot be brought about in some relatively mechanical way, simply by creating an appropriate set of sensory or other conditions.
Further even minute auditory steering responses were added up over the testing period revealing the directional performance of the cricket's phonotactic steering system under favourable conditions for auditory perception and sensory-to-motor processing.
Another is to highlight a third-relatum which encapsulates various conditions of perception such as one's spatiotemporal perspective, perceptual modality, and other conditions of perception variation in which can make for variation in phenomenal character (Campbell (2009), Brewer (2011)).
One might, nonetheless, think that there is introspective support for the claim that genuine perceptions have phenomenal properties which are such that (i) an event's possession of them is independent of the conditions of perception, and (ii) an event's possession of them is sufficient to account for the fact that the event is introspectively indiscriminible from a genuine perception.
In addition to two placebo periods, epinephrine and esmolol (a peripherally acting β1-blocker) served as control conditions for altered cardiac perception.
It is worth noting that the ancient philosophers tried to live in communities and one can think of a philosophical community, whether instantiated in a Christian congregation, a Buddhist sangha, a humanist group, as serving to protect and support the conditions for that undeluded perception of the world from which issues moral action.
Suppose further that all the propitious conditions for a veridical perception are present in this case, e.g., the traveller's vision is not defective, there is adequate light, and so on.
