baby article of a baby researcher

Hi again,
As I already written in my previous post, I need to conduct a study for one of my classes (TEFL and the learner) in the MA program. As I am a webhead, a technology enthusiast, I decided to choose a topic about CMC (Computer Mediated Communication) and relate it with a factor affecting foreign language learning, which is motivation and when I narrowed it down to a reseachable topic, I came up with an idea suitable to my own teaching context. I am using a wiki with my elementary learners for a month and I want to investigate its effects on their motivation. I intend to investigate this problem using an adapted questionnaire from Austin and Skinner and interviewing with some of my students. As the questionnaire is an adapted one, I guess will not have any problems. However, I am not sure what kind of questions to ask in the interview.Can you give this baby researcher a hand? What other instruments can I use to conduct this study?