PPIC

Methodology

Pollster

PPIC independent

Sponsor

Public Policy Institute of California

Commissioned by

Survey funded by the Arjay R. and Frances F. Miller Foundation, the Stuart Foundation, and the Windy Hill Fund

Fielded

Mar 27, 2025 – Apr 4, 2025

Population

adults

Sample size

1,591

Sample frame

probability panel

Panel

Ipsos KnowledgePanel

Mode

online - Ipsos KnowledgePanel, self-administered web, English and Spanish; median completion time 19 minutes

Margin of error

plus or minus 3.1 percentage points for the total sample of 1,591 adults, taking design effects from weighting into consideration

Weighting

base weight correcting for differential selection probability, then iterative proportional fitting (raking) to 2019-2023 ACS PUMS benchmarks for region, age, gender, race/ethnicity and education, plus party-registration benchmarks from the California Secretary of State voter file

Geography

US: California

Base notes

1,356 registered voters (sampling error 3.3 points); 1,094 likely voters (3.6 points); 279 public school parents (6.8 points). 1,642 respondents completed out of 2,972 sampled panelists; 51 cases removed for speeding or profile mismatch, leaving 1,591 valid cases.

Sources

• Original release↗(opens another site)
• Methodology↗(opens another site)

Verification note. RESOLVED. The PPIC publication page returns 403 to the fetch tool but is served normally to curl with a browser user agent; the full report, including the Questions and Responses appendix and the complete methodology section, was retrieved that way. CONFIRMED: verbatim item wording (question 68, rotated with question 67), the full four-point distribution plus don't know, the 65 percent adult and 71 percent public-school-parent net support figures, and the party breaks (49 percent Democrats, 91 percent Republicans, 71 percent independents). Methodology now fully documented: 1,591 California adults, Ipsos KnowledgePanel probability panel, English and Spanish, 55 percent response rate, sampling error 3.1 points. DATE CORRECTION: the original row carried 2025-03-01 to 2025-04-30; the true field window is March 27 - April 4, 2025. NOT CONFIRMED: the previously stored '64 percent of likely voters' figure does not appear anywhere in the PPIC report text - the report gives only the all-adult distribution, the public-school-parent figure and the party breaks for this item - so it has been dropped rather than carried forward. A future attempt wanting the likely-voter column should look for PPIC's separate detailed crosstab tables for this survey.

Figures below are transcribed from these documents. Where they disagree with the source, the source governs.