Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Extremely Accessible

I used this text in my doctoral studies. This has to be the most accessible text on the subject I have yet to see. The examples are simple, the language lacks complexity, and the logical order of text is commendable. For someone wanting to understand research methods that does not have the supporting background, this is a great primer text. What this text does better than others I've seen is that it does a nice job explaining the multitude of research designs available for researchers.The single weakness that I would attribute to this text is that it doesn't help the researcher pick which statistical tests to use for their particular research very well. With that said, it is obviously not intended to be a statistics book and does not go to the depth needed to complete doctoral level research by itself, but it is an excellent companion text.