In a double-blind study, who is unaware of the group assignments?

1. Expectations can shape both what a participant reports and what a researcher records. 2. In a double-blind study, both the researchers and the participants are blind to group assignments. 3. That removes expectation effects on both sides at once. 4. A single-blind design would leave one side informed. _Source: OpenStax Psychology 2e (CC BY 4.0), Ch 2 'Psychological Research', sections 2.1-2.4_