1) A case study is when researchers conduct in-depth investigations of individuals or of small groups. The EX POST FACTO method is an experimental research process, where the researcher manipulates the independent variable, while the dependable variable is controlled with the aim of establishing the effect of the independent variable on the dependable variable. There are many advantages and disadvantages to case studies. An advantage is that it can provide insight to specific cases. A disadvantage is that it may focus on isolated circumstances or events that cannot be replicated. Also a disadvantage is that people interviewed in case studies may distort their past experiences. 2) The scientists were trying to find out if people learn language from their environment or are they born with an innate ability to speak? They were also trying to find out if people can learn a language at any time in their lives or must they learn to speak when they are young? The hypothesis of their study was that she would not be able to come back to be a normal living human that is her actual age.
