| Research Question: |
| Does assignment to any physician-delivered COVID-19 video increase information-seeking behavior among Black or Latinx adults in the United States? |
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| Hypothesis: |
| H0: Assignment to any physician-delivered COVID-19 video does not increase information-seeking behavior relative to pure control |
| H1: Assignment to any physician-delivered COVID-19 video increases information-seeking behavior relative to pure control |
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| STUDY DESIGN: |
| - Type: Randomized controlled trial |
| - Unit of observation: Individual adult respondent |
| - Sample: Black or Latinx adults in the United States surveyed in May 2020 |
| - Comparison: Any video treatment versus pure control |
| - Study structure: Single post-treatment survey with randomization within demographic strata |
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| VARIABLE GLOSSARY: |
| - intended_behavior: Count of information links demanded (integer, 0-10) [OUTCOME] |
| - anytreat: Assignment to any video treatment versus pure control (binary: 0/1) [TREATMENT] |
| - stratum: Randomization stratum based on race, gender, and age (categorical) |
| - resp_lang: Survey language (categorical) |
| - resp_race: Respondent race (categorical) |
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