I chose to do the topic of ‘is yawning contagious’. I actually find it hard to critique the experiment over just a four minute clip, but i definitely found quite a few of strengths and weaknesses.
Overview: They brought subjects one by one into isolated rooms. Some of the subjects would be exposed to a yawn before they enter the room. The conclusion of the experiment was that 29% of the exposed subjects yawned and 25% of the subjects not exposed to the yawn. They tested 50 subjects. They had groups of three go into separate rooms and two out of three were subjected to yawns.
They made sure to isolate each subject with the same conditions for each subject. They set up a great environment for each subject.
The person exposing the yawn was the independent variable. The dependent variable were the subjects exposed to the yawn.
They did have a control which were the people not subjected to a yawn.
I think that sitting in a small room by yourself with a sign saying quiet please could get very boring and typically when people get bored they get tired and yawn. A way they could improve this is by having the subjects doing a small task that is too physically or mentally demanding.
I think that if they put a bunch of people in a room together and had one person planted in there to yawn one time and see how many subjects yawn after the initial yawn.