It is very important to use CREDIBLE web sites for your research. Information on a web site is often not reviewed for accuracy and timeliness. (This doesn't include journal articles and books reprinted digitally.) Think about the web site you are using.
If the answer to these questions is "No," then ask these questions:
You can find additional suggestions for evaluating web resources on UC Berkeley's page: Evaluating Web Pages: Techniques to Apply & Questions to Ask: http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/Evaluate.html.
You can use commands to do an Advanced Search in "regular" Google Search.
filetype: pdf [give me ONLY pdf documents]
why? Most research reports are published online in pdf format.
alternative-- filetype:ppt for powerpoint presentations
domain: org [give me ONLY results from .org web sites]
why? Most research organizations are nonprofits, which use the .org domain.
alternative-- domain:edu for university web sites.
"employee participation" [give me only documents that contain this phrase]
alternative-- whatever Key Words and Key Phrases define your research topic.