Which of the following best describes or defines a personality disorder? an enduring and rigidly pervasive pattern of behavior and experiences that is stable through time and leads to unhappiness, impairment and relationship difficulties. experiences that deviate from cultural norms and cause changes in perception and coping mechanisms. have an onset in late adulthood due to stress of financial concerns, marriage difficulty and child rearing. the inability to cope that leads to deviate behavior of the adolescent.