After expressing interest in the company I was invited to lunch at the Menlo Park office. Talked to several people from the group I was interested in working. Though these lunches are considered informal, you ARE being evaluated and it pays off to be well prepared and research the people you'll be meeting. I then had a phone interview with a senior manager - this is a great opportunity to get your questions answered and to show genuine interest in the position. After the phone conversation, was invited for a full day interview, which included a technical presentation. The presentation is extremely important: make it as broad as possible while emphasizing your ability to work with others and solve problems. If you've gotten this far in the process they know you have good technical skills, now you have to prove that you have the ability to communicate effectively ("give me a 3min summary of your research" was a popular question) and answer questions on the fly.

The interview included mostly basic professional questions about communication skills, problem solving, and ability to manage projects. Interviewers asked how you would interact with clients, handle tight deadlines, and coordinate survey research tasks. There were also questions about working in fast paced environments, staying organized across multiple projects, and how you would approach recruiting experts and ensuring survey responses are accurate and high quality.