UPDATED Mar. 13, 2023, at 3:53 PM

FiveThirtyEight’s Pollster Ratings

Based on the historical accuracy and methodology of each polling organization’s polls.

A/B

Western New England University Polling Institute

Polls analyzed	11
Races called correctly	100%
Most recent cycle	2018
Affiliated with AAPOR/Roper	Yes
Other names

What are pollster ratings?

How accurate are the polls from Western New England University Polling Institute?

Polls conducted within 21 days of an election (based on the poll’s median date) are used to determine the pollster’s grade.

2018

Key

A = Adults

RV = Registered voters

V = Voters

LV = Likely voters

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Oct 10-27	402LV	Governor (MA) General election	Live Phone	Poll Baker +38.0	Actual Baker +33.6	Difference 4.4
Oct 10-27	402LV	Senate (MA) General election	Live Phone	Poll Warren +30.0	Actual Warren +24.2	Difference 5.8

2016

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Oct 23-Nov 2	417LV	President (MA) General election	Live Phone	Poll Clinton +30.0	Actual Clinton +27.6	Difference 2.4

2014

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Oct 21-30	430LV	Governor (MA) General election	Live Phone	Poll Baker +5.0	Actual Baker +1.9	Difference 3.1
Oct 21-30	430LV	Senate (MA) General election	Live Phone	Poll Markey +20.0	Actual Markey +23.9	Difference 3.9

2013

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Jun 16-20	566LV	Senate (MA) Special election	Live Phone	Poll Markey +8.0	Actual Markey +10.2	Difference 2.2

2012

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Oct 26-Nov 1	535LV	Senate (MA) General election	Live Phone	Poll Warren +4.0	Actual Warren +7.6	Difference 3.6
Oct 26-Nov 1	535LV	President (MA) General election	Live Phone	Poll Obama +18.0	Actual Obama +23.2	Difference 5.2

2010

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Oct 24-28	361LV	Governor (MA) General election	Live Phone	Poll Patrick +5.0	Actual Patrick +6.4	Difference 1.4
Oct 16-21	400LV	Governor (MA) General election	Live Phone	Poll Patrick +8.0	Actual Patrick +6.4	Difference 1.6

2008

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Jan 20-26	151LV	President (MA) Democratic primary	Live Phone	Poll Clinton +28.0	Actual Clinton +15.5	Difference 12.5

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How this works

FiveThirtyEight’s pollster ratings are calculated by analyzing the historical accuracy of each polling organization’s polls along with its methodology. Accuracy scores are adjusted for the type of election polled, the poll’s sample size, the performance of other polls surveying the same race and other factors. We also calculate measures of statistical bias in the polls. When a pollster publishes multiple versions of the same survey (for example, versions with and without third-party candidates included), FiveThirtyEight uses an average of the different versions to calculate the pollster’s rating. However, all versions of these polls are listed here. Read more about our methodology»

Download this data as an Excel spreadsheet or get it on GitHub.

Design and development by Elena Mejía and Aaron Bycoffe. Research by Mary Radcliffe, Cooper Burton and Dhrumil Mehta. Copy editing by Andrew Mangan. Visual editing by Christopher Groskopf. Statistical model by Nate Silver.

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