Data collected by this research team suggests that a variety of factors may influence the effectiveness of real-time CPR feedback. CPR providers interviewed after a simulated cardiac arrest report that they often are distracted by other events while providing CPR, are unable to clearly see the device, or have difficulty interpreting the visual display on the CPR feedback device. Additionally, many providers' perception of CPR quality is inaccurate, with providers consistently overestimating the quality of CPR provided during simulated CPA, even when using CPR feedback. This suggests a need to improve provider perception of CPR and provider awareness of the CPR feedback device.