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Durvasula added that "stubbornness could be viewed as a form of perseveration, again, an executive function in the brain."

Instead, by a principle you might call the perseveration of enmity, a new population stepped in to take up the slack: mostly middle-class Protestants from other suburbs now mixing with ours at a new school.

Your hesitation and his perseveration suggest the emotional health of your marriage warrants a closer look.

Mr. Bruck seeded his speech with words like “abnormal,” “irrationality,” “senselessness,” “delusional,” “obsession” and “perseveration,” a psychiatric term referring to the uncontrollable repetition of a particular response.

Psychologists call stubborn and irrational persistence in repeating an act or behavior “perseveration,” defined as the attempt to overcome past failures by trying again at the same task.