The study tested the proposition that coping is personality in action under stress. Using a stressful medical school entrance examination, the study examined (a) whether neurotieism emerged in coping patterns over time and (b) whether the influence of neurotieism on coping accounted for changes in anxiety and examination performance. Fifty premedical students reported their coping efforts at 35 days before, 10 days before, and 17 days after the examination. They provided daily reports of anxiety for 35 days surrounding the examination. Neuroticism influenced coping efforts and increases in daily anxiety under stress. Two types of coping, wishful thinking and self-blame, explained over half the relationship between neuroticism and increases in preexamination anxiety. Consistent with previous research, neither neuroticism nor specific coping efforts influenced examination performance. I am grateful to Jane Crawford and Don Cook for access to the sample, to Paula Hanpeter and Stuart Beraha for research assistance, and to