A press briefing is generally delivered by the __________

Noted program evaluator Carol Weiss has pointed out that social science research has____________________

a) Greatly influenced policy and practice b) Not generally had major influence on policy or practice c) Tended to influence agenda setting of grassroots activists d) Determined the most appropriate methods for policy implementation

When research participants give information to prospective participants about the procedures, the research could be affected by the confounding variable of

A) the bystander effect. B) diffusion of responsibility. C) diffusion of treatment. D) regression to the mean.