From November 11 through December 4, 1989, the Center for Survey Research of the University of Massachusetts at Boston conducted a random digit dial survey of adults aged 18 and over in Massachusetts. A total of 423 individuals were interviewed in a sampling procedure that yielded a 63 percent response rate. In contrast to most media polls, this survey was carried out over a period of four weeks permitting extensive efforts at locating and interviewing difficult-to-reach, reluctant, or less interested respondents. This survey is likely to be more representative of the true population of Massachusetts than most state polls.
Bluestone, Barry; Colten, Mary Ellen; and Ferguson, Thomas, "Commonwealth's Choice: Results from the Massachusetts Public Opinion Survey" (1990). John M. McCormack Graduate School of Policy and Global Studies Publications. 17.