Do you think it is more effective to search the invisible web (databases) than using search engines, meta-search or subject directories? Why?
I think it is better to use search engines such as google to search for information due to its simplicity and effectiveness.
Subject directories are compiled by humans, thus it might not ahve the information you are looking for if no one has ever compiled it before.
Meta search engines are not too bad.
It searches several different search engines all at once.
However the results churned out are sometimes irrelevant.