Recently i've found an interesting article about an tiny study released by DuckDuckGo (in 2012), pointing out that Google reseach results are really really different depending on each user. Therefore i think they did an experiment with 131 volunteers. Here is a link to the video of few results: https://vimeo.com/51181384
But beside the video i can't find any official research paper of the study... and all linked sources are offline. But i really would like to read those details... because i plan a quite similare research in germany.
Does anybody know where i can find the study?
You would help me a lot! :)