Cp: Invite Trial Txt

-------------------------------------------------------------------------------- 2. METHODOLOGY -------------------------------------------------------------------------------- 2.1 Population: Closed group (registered panel members, no new entries allowed). 2.2 Sample Size: 500 individuals. 2.3 Invitation Channels (randomized equally, n=125 per arm): - Arm A: Email only - Arm B: SMS only - Arm C: In-app notification only - Arm D: Multi-channel (email + SMS reminder after 48h) 2.4 Invitation Message (standardized): "You are invited to participate in a 10-min confidential survey. Click [link] to begin. Reward: $10 gift card upon completion." 2.5 Trial Period: 7 consecutive days.

Multi-channel arm reached 50% response by Day 2; single-channel arms required 4-5 days to approach 50%. CP Invite Trial txt

Average response rate across arms: 46.0% CP Invite Trial txt