Deb Roy studied the environment around his child to see how he learns a new language and how that develops over time. What I found interesting with this idea was the methodology he used to conduct this research. He documented the process over time in such a way that he was able to filter out the words that the baby heard the most and the people he was around the most. Based on this, he was able to diagram a process of his language learning. He used simple technology such as camera around the house. However he was able to extract the data that was relevant to his study.