A sample selected because of its low cost or because of time pressures. Convenience samples are useful for pretesting <a href="search.pl?p=intentions surveys">intentions surveys</a> or <a href="search.pl?p=expert opinion">expert opinion</a> studies. However, it is important to use <a href="search.pl?p=probability samples">probability samples</a>, not convenience samples, in conducting intentions studies.<o:p></o:p></P>