Results

Blood Pressure

  Percent difference between the blood pressure at the start of video and blood pressure at the end of the video for both the traditional and non-traditional lectures was calculated. Figure 1 shows these differences. Data for the traditional lecture have a larger range than do those for the non-traditional lecture. A two-tailed t-test was used to compare the two groups. The P-value of this t-test was 0.047, which indicates a significant difference between the two series. Participants' blood pressure decreased more during the traditional lecture than it did for the non-traditional lecture. The error bars in Fig. 1 represent standard deviation, while the center line shows the average of the data sets.