Research for Natural Depression Treatment

I need a few research subjects to participate in survey work about productivity at the workplace. I want to find out if the equipment I am selling helps really the cause of depression, reducing depression. There is already research suggesting that negative ions-generating air purifiers can be used to positively affect mood disorders and depression. If that is so, then at home and at work we can likely be more productive since my own research has revealed that people with depressions or poor moods are anti-social and/or experience conflict more likely and conflict at work and at home is strong cause for productivity problems because of people not colaborating effectively.

I am paying $ 50.00 rebate back to air-purifier buyers that participate in the survey. This will give an incredible savings to the consumer(s). Please contact me for more information.
http://www.123vita.com provides the link to the survey. Thanks.
Thomas