(Background) To help us understand the medical students' reflections about professional skill educations we conducted a study on medical students' conceptions of selected medical phenomena, cardiopulmonary resuscitation, CPR. (Methods) The study was conducted in January 2008, using a sample consisting of medical students from one of the universities in Turkey (n=31). After cardiopulmonary resuscitation education with manikins, students were asked to filled out a questionnaire consisting of twelve Likert scale questions. Statistical analysis were done by using Somers' d correlation coefficient. (Results) When we made correlation between satisfied participants and the answers to the questions; satisfied participants stated that their vision regarding this lesson was changed (p=0.003), time was enough (p=0.003), their attitude about necessity of CPR education was changed (p=0.004), they have learned everything they need about this subject (p=0.004), their expectations are countered (p=0.008), they think they are supported by the educator (p=0.033), they have wanted to know more about this subject (p=0.025), this session helped them to realize what they know (p=0.000), and they believe about future modifications on their approaches (p=0.010). (Conclusion) Professional Medical Skills Laboratory in an important part of undergraduate medical education. Studies in these areas will add positive dynamic to medical education systems.