<unk>  (also known as<unk> ; from Ancient Greek ἠχώ (ēkhṓ) "echo, reflected sound") is "automatic imitative actions without explicit awareness" or pathological repetitions of external stimuli or activities, actions, sounds, or phrases, indicative of an underlying disorder. The echophenomena include repetition: * echolalia (syn. echophrasia) – of vocalizations (the most common of the echophenomena) * echopalilalia – of words * echopraxia (syn. echokinesis, echomatism) – of actions, movements * echopathy – of actions or speech * echoplasia – physically or mentally, tracing contours of objects * echolalioplasia – involving sign language, described in one individual with Tourette syndrome ().
Echophenomenon
Interventionism 
Unwarranted variation
Ideomotor phenomenon
Neglect
Attrition 
Weekend effect
Forced normalization