A closer look at the methodology of the Brown University poll

The 496 interviews used for Brown University’s new survey were conducted in two sets over 10 days.

The survey results combine findings from two groups of interviews conducted almost a week apart, the first done from Sept. 26 to 29 and the second done from Oct. 4 to 5, according to Marion Orr, the professor who oversees Brown’s polling. “We did two consecutive sets of days,” Orr told WPRI.com.

Asked whether the poll included cell phones as well as landlines, Orr said the call list was created using phone numbers that some Rhode Islanders voluntarily write down on the official voter registration forms they file with the secretary of state’s office.

A breakdown provided by Brown shows the 496 survey respondents identified themselves as 45% independents, 37% Democrats and 10% Republicans, with an additional 6% of voters classified as “other” and 3% who didn’t know or didn’t say. As a comparison, the 501 voters surveyed in last week’s WPRI 12 poll were 40% independents, 41% Democrats and 17% Republicans, with another 2% who refused to say.

The Brown poll’s gender breakdown was 50.2% female and 49.8% male, and its age breakdown was 10% under 30; 18% ages 30 to 44; 31% ages 45 to 60; 28% ages 61 to 74; and 11% ages 75 and older. Orr said the university trains and pays undergraduate and graduate students to conduct the survey interviews.

• Related: Cicilline leads by 6 points in new Brown poll; Republicans trail (Oct. 10)

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