Blood donorship and psychological reactance.
Research in social psychology suggests that expressing urgent need in requests for blood donation may result in less volunteering to help, not more. In addition, there is evidence that requests for several donations over a period of time are more likely to meet with refusal than requests for only one donation. These issues were investigated within the framework of a social psychological theory known as reactance theory.
D001771:Blood Banks; D001782:Blood Donors; D006801:Humans; D011593:Psychology, Social; D013689:Telephone; D014836:Volition