VotePredictor
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PSB Research

Graded against the actual result across 48 races (from 49 polls, through 2010).

Races polled
48
Polls
49
Avg miss
6.45 pts
Most recent
2010

Head-to-head vs the VotePredictor model

The fair, apples-to-apples test: on the 46 races PSB Research actually polled, how its final poll's margin compared to what the VotePredictor model predicted for those same races.

ModelAvg miss (pts)Called right
PSB Research5.8878%
VotePredictor4.6589%

VotePredictor aggregates all the pollsters, so it's expected to beat any single one on margin — that's the value of averaging. The honest comparison among forecasters is on the combined board.

Every race (48)

Each race PSB Research polled, scored on its final poll — the call right before the vote — against the actual Dem−Rep result. Click a race for its full detail.

RaceTheir callResultMissCall
2010 AR-1 HouseR+12.0R+8.33.7
2010 AZ-1 HouseR+7.0R+6.01.0
2010 AZ-5 HouseR+3.0R+8.85.8
2010 CO-3 HouseR+4.0R+4.30.3
2010 CO-4 HouseR+3.0R+11.18.1
2010 FL-2 HouseR+12.0R+12.20.2
2010 GA-8 HouseR+13.0R+5.47.6
2010 HI-1 HouseR+4.0D+6.510.5
2010 IA-3 HouseD+12.0D+4.27.8
2010 IL-10 HouseD+12.0R+2.214.2
2010 IL-11 HouseR+18.0R+14.73.3
2010 IL-14 HouseR+1.0R+6.35.3
2010 IL-17 HouseR+7.0R+9.62.6
2010 IN-9 HouseD+2.0R+10.112.1
2010 MD-1 HouseR+3.0R+12.19.1
2010 MI-1 HouseR+3.0R+11.18.1
2010 MI-7 HouseEVENR+4.84.8
2010 MS-1 HouseR+5.0R+14.59.5
2010 ND-1 HouseD+1.0R+9.810.8
2010 NH-1 HouseR+5.0R+11.66.6
2010 NH-2 HouseR+3.0R+1.61.4
2010 NM-2 HouseR+4.0R+10.86.8
2010 NV-3 HouseR+3.0R+0.72.3
2010 NY-19 HouseEVEND+4.74.7
2010 NY-24 HouseD+10.0D+2.17.9
2010 OH-15 HouseR+9.0R+12.93.9
2010 OH-16 HouseR+3.0R+10.87.8
2010 PA-10 HouseEVENR+10.410.4
2010 PA-11 HouseR+5.0R+9.44.4
2010 PA-3 HouseR+13.0R+11.41.6
2010 PA-7 HouseR+1.0R+11.010.0
2010 PA-8 HouseD+3.0R+7.010.0
2010 SC-5 HouseR+10.0R+10.30.3
2010 SD-1 HouseD+3.0R+2.25.2
2010 TN-8 HouseR+10.0R+20.210.2
2010 TX-17 HouseR+12.0R+25.213.2
2010 VA-2 HouseR+6.0R+10.74.7
2010 VA-5 HouseR+1.0R+3.82.8
2010 WA-3 HouseR+2.0R+5.93.9
2010 WI-7 HouseR+9.0R+7.71.3
2010 WI-8 HouseR+1.0R+9.68.6
2010 WV-1 HouseD+3.0R+0.83.8
2009 NJ GovernorR+5.0R+3.61.4
2006 NE-3 HouseD+6.0R+10.016.0
2005 NJ GovernorD+13.0D+10.42.6
2004 US PresidentR+4.0R+2.41.6
2002 NJ-5 HouseR+2.0R+21.219.2
2002 NV-3 HouseR+1.0R+18.817.8

Accuracy by time to election

24686–9 wk3–6 wk1–3 wk≤1 wkavg miss (pts)
PSB ResearchAll pollsters (field average)

Lower is better. Time to election runs right (election week) to left (~2 months out).

By the numbers

Time to electionPollsAvg missvs fieldCalled right
1–3 wk187.08+2.0167%
3–6 wk276.14+0.4082%
6–9 wk45.73-0.42100%

vs field is this pollster's average miss minus all pollsters' at the same lead time — green beats the field, redtrails it. Our historical polls reach ~2 months out; earlier polling isn't in the record.