The patient appears to be in no apparent distress, but vital signs taken by assistive personnel reveal an extremely low pulse. The nurse then auscultates an apical pulse and asks the patient whether there is any history of heart problems. The nurse is utilizing which critical thinking skill?

A) Evaluation
B) Explanation
C) Interpretation
D) Self-regulation

Interpretation involves being orderly in data collection, looking for patterns to categorize data, and clarifying uncertain data. This nurse is clarifying the data in this situation. Evaluation involves determining the effectiveness of interventions or care provided. The nurse in this scenario is assessing the patient, not evaluating interventions. Self-regulation is reflecting on experiences. Explanation is supporting findings and conclusions. The nurse in this question is clarifying uncertain data (determining cause of the low pulse), not supporting the finding of a low pulse.