In the video, you can visually see what the procedure looks like and the task that is at hand. In both of the articles, without seeing a video of the experiment, you would need to use your imagination and combine it with the data you have about the course. By doing this, you can envision your own type of course. However, the article “Elephants can lend a helping trunk” has a picture that give you a better understanding of what the obstacle looks like. The article “Elephants know when they need a helping trunk in a cooperative task”, is mainly about the procedure and experiment set up where as the article. “Elephants can lend a helping trunk” also includes some of the history about elephants and their