title: Perseveration in healthy subjects: an impressive classroom demonstration for educational purposes.
abstract: Perseveration, that is, the inappropriate maintenance of an activity, is not exclusively observed in patients with brain pathology. We present a brief calculation task that requires healthy subjects to add eight numbers sequentially. While the first seven steps of the addition involve the repeated application of a particular rule, this rule does not apply for the last step. However, a high percentage of subjects (approximately 70%) will commit a perseverative error at this last step and hence obtain an incorrect final result. This simple task is a highly informative illustration of the principle of perseverative behavior. When applied in a classroom setting, it is an impressive demonstration of the ease with which perseveration can be evoked in healthy persons.
authors.affiliation: University of California, San Diego.
authors.forename: P
authors.initials: P
authors.lastname: Brugger
authors.forename: M
authors.initials: M
authors.lastname: Gardner
mesh_terms: D001288:Attention; D005717:Games, Experimental; D006801:Humans; D011340:Problem Solving; D013239:Stereotyped Behavior