- 0Feb 7, '10 by hollydollCollective Bargaining (Unionized) RN's needed for doctoral research study comparing union and non-union nurses perceptions of verbal aggression from peers. We really need to hear from our union colleges to complete the study. Need approximately 60 more participants. If you would like to participate in this important study send me a private message and will send you the link. The survey only takes 15 minutes to complete. Thanks for your help.