From 33baf51f1be157d659bcc72ed3d27ce10c21130c Mon Sep 17 00:00:00 2001 From: Alex Reinhart Date: Fri, 30 Jul 2021 15:02:59 -0400 Subject: [PATCH] Document late July response drop --- docs/symptom-survey/problems.md | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/docs/symptom-survey/problems.md b/docs/symptom-survey/problems.md index 9313bd300..ba545aa1f 100644 --- a/docs/symptom-survey/problems.md +++ b/docs/symptom-survey/problems.md @@ -17,6 +17,14 @@ interpretation of results. All problems will be logged here. 1. TOC {:toc} +## Response Volume Drop (July 20-22, 2021) + +On July 20, 2021, a technical problem in the process that samples Facebook users +for invitation to the survey caused lower-than-normal sample sizes. The problem +was resolved on July 22 and users that had been incorrectly not invited were +invited over the following several days. This caused sample sizes to temporarily +increase, compensating for the initial drop. + ## Incorrect Coding in Documentation We found a Qualtrics bug that affects the exported text of the survey (but not