Echolalia vs Echopraxia
Overview
Both are automatic imitation phenomena seen in the same catatonic and organic presentations, and the two are almost always mentioned in the same breath. The only real difference between them is the channel of imitation: echolalia copies what is heard, echopraxia copies what is seen.
| Dimension | echolalia | echopraxia |
|---|---|---|
| What is imitated | Speech — the automatic repetition of part or all of what has just been said to the patient | Simple physical actions — the involuntary imitation of a movement observed in another person |
| Sensory channel involved | Auditory — words heard are echoed back | Visual — actions seen are copied |
| Understanding of the stimulus | Not required — the words are repeated regardless of whether the patient understands them, even echoing phrases in a language they don't know | Not required — the action is imitated automatically, without any apparent purpose of the patient's own |
| Typical trigger | Any speech directed at, or occurring near, the patient | Any simple action performed by another person within the patient's view, such as hand-clapping or finger-snapping |
| Typical example | Asked "How are you feeling today?", a patient simply repeats back, "How are you feeling today?" | When the examiner claps their hands, the patient claps their hands too, apparently without meaning to |
Common confusion
Because the two so often appear together in the same patient and the same catatonic presentations, students sometimes use the terms interchangeably rather than distinguishing them. The distinction is simple once stated directly: 'echolalia' shares its root with words heard and repeated, 'echopraxia' with actions seen and copied — and a patient can display one without the other.
Clarifying questions
- Is this happening with words that are said to the patient, or with actions the patient sees someone else do?
- Does the patient seem to understand what's being repeated or imitated, or does it happen automatically regardless of understanding?
- Is this occurring alongside other catatonic features, such as posturing or negativism?
Provenance
Class B · tier T1 · lifecycle migrated_candidate
- Casey, P. & Kelly, B. (2019). Fish's Clinical Psychopathology, 4th ed. Ch. 8, 'Motor Disorders'.