| speech perception | The process whereby an utterance is decoded into a representation in terms of linguistic units (sequences of phonetic segments which combine to form lexical and grammatical morphemes). (12 Dec 1998) |
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| distance perception | The act of knowing or the recognition of a distance by recollective thought, or by means of a sensory process which is under the influence of set and of prior experience. (12 Dec 1998) |
| time perception | The ability to estimate periods of time lapsed or duration of time. (12 Dec 1998) |
| extrasensory perception | Perception by means other than through the ordinary senses; e.g., telepathy, clairvoyance, precognition. (05 Mar 2000) |
| form perception | The sensory discrimination of a pattern shape or outline. (12 Dec 1998) |
| loudness perception | The perceived attribute of a sound which corresponds to the physical attribute of intensity. (12 Dec 1998) |