Nownes (2000) surveyed representatives of interest groups who were registered

as lobbyists of three U.S. state legislatures. One of the issues he studied was
whether interest groups are in competition with each other.

3 answers

Mouradian (2001) surveyed college students selected from a screening session to
include two groups: (a) “Perpetrators”—students who reported at least one violent
act (hitting, shoving, etc.) against their partner in their current or most recent
relationship—and (b) “Comparisons”—students who did not report any such
uses of violence in any of their last three relationships. At the actual testing session,
the students first read a description of an aggressive behavior such as,
I don't see any questions here.
“Perpetrators”—students who reported at least one violent
act (hitting, shoving, etc.) against their partner in their current or most recent
relationship—and