PSB Research
Historical accuracy is measured against certified results. Current-cycle records come from the canonical, deduplicated archive and do not by themselves change the sealed forecast.
- Historical polls
- 19
- Mean absolute error
- 7.75percentage points
- Historical bias
- D+4.26
- Represented cycles
- 31998–2010
- Current archive
- 0canonical records
- History span
- Oct 28, 1998through Oct 20, 2010
Known names and relationships
- Known aliases
- No additional reviewed aliases
- Organization type
- Single canonical organization
- Cycles represented
- 1998 · 2006 · 2010
19 eligible historical polls across 3 represented cycles passed the published history identity checks. Historical bias is descriptive and is kept separate from sponsor or client affiliation.
Current-cycle records
Archive source date 2026-09-09 · bundled copy. Archive records may be newer than the sealed forecast; inclusion here does not mean the forecast uses them.
0 shown · 0 total
No record in the currently authorized canonical archive is attached to this identity.
This is not evidence that the pollster released no 2026 polling; the source-audit gaps remain documented.
Eligible historical observations
19 shown · 19 total
| Cycle | Race | Type | Field end | Sample | Poll | Result | Error |
|---|---|---|---|---|---|---|---|
| 2010 | 2010_House-G_TX-17 | House-G | 2010-10-20 | 404 | R+12.0 | R+25.2 | D+13.2 |
| 2010 | 2010_House-G_PA-11 | House-G | 2010-10-20 | 402 | R+5.0 | R+9.4 | D+4.4 |
| 2010 | 2010_House-G_IA-3 | House-G | 2010-10-20 | 404 | D+12.0 | D+4.3 | D+7.8 |
| 2010 | 2010_House-G_GA-8 | House-G | 2010-10-20 | 400 | R+13.0 | R+5.4 | R+7.6 |
| 2010 | 2010_House-G_CO-3 | House-G | 2010-10-20 | 400 | R+4.0 | R+4.3 | D+0.3 |
| 2010 | 2010_House-G_SD-1 | House-G | 2010-10-18 | 399 | D+3.0 | R+2.2 | D+5.2 |
| 2010 | 2010_House-G_SC-5 | House-G | 2010-10-18 | 499 | R+10.0 | R+10.3 | D+0.3 |
| 2010 | 2010_House-G_ND-1 | House-G | 2010-10-18 | 398 | D+1.0 | R+9.8 | D+10.8 |
| 2010 | 2010_House-G_IN-9 | House-G | 2010-10-18 | 400 | D+2.0 | R+10.1 | D+12.1 |
| 2010 | 2010_House-G_FL-2 | House-G | 2010-10-18 | 399 | R+12.0 | R+12.3 | D+0.3 |
| 2010 | 2010_House-G_WI-8 | House-G | 2010-10-13 | 415 | R+1.0 | R+9.7 | D+8.7 |
| 2010 | 2010_House-G_PA-10 | House-G | 2010-10-13 | 406 | 0 | R+10.3 | D+10.3 |
| 2010 | 2010_House-G_NY-24 | House-G | 2010-10-13 | 400 | D+10.0 | R+6.2 | D+16.2 |
| 2010 | 2010_House-G_NY-19 | House-G | 2010-10-13 | 416 | 0 | R+5.4 | D+5.4 |
| 2010 | 2010_House-G_MS-1 | House-G | 2010-10-13 | 603 | R+5.0 | R+14.5 | D+9.5 |
| 2010 | 2010_House-G_IL-17 | House-G | 2010-10-13 | 417 | R+7.0 | R+9.6 | D+2.6 |
| 2010 | 2010_House-G_AZ-5 | House-G | 2010-10-13 | 408 | R+3.0 | R+8.8 | D+5.8 |
| 2006 | 2006_House-G_NE-3 | House-G | 2006-10-29 | 404 | D+6.0 | R+10.0 | D+16.0 |
| 1998 | 1998_House-G_US | House-G | 1998-10-28 | 500 | D+10.0 | R+0.9 | D+10.9 |
Method · historical final-three-week D/R general-election rows plus verified historical supplement; min n=5
Definition · bias_D is poll D-R margin minus actual D-R margin; positive overstates Democrats.
A missing sample, sponsor or source is labeled unavailable; it is never reconstructed.
Poll data via VoteHub, used under CC BY 4.0. Poll data from The New York Times, used under CC BY 4.0.