Pollster scorecard · ranked 53 of 69 · Democratic-aligned
How accurate is Change Research?
Change Research's 109 polls in the final three weeks of 2017–2020 races missed the final margin by 6.4 points on average, ranking 53rd of 69 pollsters on the ElectionsUSA scorecard. On average its polls leaned 3.4 points toward Democrats, and 75% had the eventual winner ahead.
- Average error
- 6.4
- points on the final margin; all pollsters 5.8
- Adjusted error
- 6.30
- 53rd of 69 on the scorecard
- Partisan bias
- D+3.4
- average signed miss
- Right call
- 75%
- of polls had the winner ahead
- Rated polls
- 109
- final three weeks, 2017–2020
- 538 grade
- B-
- final (2023)
Main survey method in the rated polls: Online.
By election year
| Year | Polls | Avg error | Bias | Right call |
|---|---|---|---|---|
| 2017 | 7 | 4.9 | R+4.2 | 57% |
| 2018 | 51 | 5.5 | D+2.5 | 81% |
| 2020 | 51 | 7.5 | D+5.7 | 71% |
By race
| Race | Polls | Avg error | Bias | Right call |
|---|---|---|---|---|
| House | 39 | 5.9 | D+4.2 | 82% |
| Senate | 28 | 5.9 | D+2.1 | 62% |
| President | 22 | 5.0 | D+4.3 | 75% |
| Governor | 13 | 5.8 | D+2.3 | 77% |
| Presidential primary | 7 | 16.1 | n/a | 79% |
Change Research polls on ElectionsUSA (1)
CSV →| Race | Dates | Sample | Result | Margin |
|---|---|---|---|---|
| Generic ballot ↗ | Sep 15–24, 2026 | 2,021 RV | Democrats 46% · Republicans 39% | Democrats +7.0 |
Every poll ElectionsUSA has recorded for the approval, generic-ballot and 2028 averages, newest first. Names after a race are the media sponsor or co-pollster; ↗ opens the source.
How these numbers work
Accuracy covers polls taken in the final three weeks of races from 2016 to 2022, from FiveThirtyEight's open archive of polls matched to certified results (CC BY 4.0). Average error is the mean absolute difference between the poll's margin and the actual margin. The adjusted error shrinks it toward the field average (k = 15 polls) so a short hot streak can't outrank a long record, and the ranking uses it. Bias is the average signed miss: D+ means the polls were more favourable to Democrats than the result, R+ more favourable to Republicans.
Polls are listed under the firm that conducted them, even when the source names a media partner first (for example "The Economist/YouGov" or "CNN/SSRS"). Full method on the scorecard and methodology pages. Something wrong? Report it through the corrections page.