Hi Fernando - sounds like an interesting project. It might be useful to know what you are seeking to look at - are you, for example, most concerned with trustworthiness of reviews? If so, is you starting assumption that those reading the reviews place reliance on them, and is that an unthinking, total reliance, or is there a degree of skepticism?

You might find the Trust Project at Northwestern University (USA) interesting.

Hi Fernando-

You might be interested in utilizing Raven's Eye for your study.

One of the features of Raven's Eye is that it collects data directly from websites, TripAdvisor in your study. Makes it easy to do comparisons of website information. You can compare submissions based on user demographics or compare various travel based websites.

This is a interesting study. I am interested to hear about your findings when you are done.

Keep up the great work!

https://ravens-eye.net