Independent Variable Pre-Lab

An Independent Variable would be health conditions. For example, if one has asthma or not, this will affect the number of breaths that one makes. Thus, those health conditions cause the number of breaths to change. A Dependent Variable would the size of the bag. The Controlled Variables would be time intervals, number of people in a group, etc. The Constant Variable would be environment and temperature. The Materials needed for the experiment are pencil, paper bag, and stopwatch. There are two components of the procedures section, as there was a pre-lab activity, and the actual experiment. For the pre-lab activity, there was one group member who would breathe into the bag for three minutes, while another group member times thirty-second intervals. The other two group members would observe the

It would decrease the number by one for any interval, where there is an observed decrease in the depth of breathing. If the depth of breathing doesn’t change significantly from one interval to the next, then repeat the same number had for the previous interval. Repeat this whole process, but with a second observer doing the pre-lab activity. Afterwards, compare the results for the two observe, by checking the criteria used, and attempt to agree on reliable procedures for rating the depth of breathing. Next, switch roles to have a new subject and a timer and two new observers of depth of breathing. Record the results, without the group member communicating with each other. Once completed, compare the results. If the results are similar, summarize the procedures for rating the depth of breathing. If the results differ (significantly), improve the procedures and try again. This is the overall gist of the pre-lab, now onto the actual lab. The actual experiment will be carried out four times, with each time a different group member will be the experimental