Source

When and why defaults influence decisions: a meta-analysis of default effects

peer-reviewed meta-analysis Jachimowicz, J. M., Duncan, S., Weber, E. U. and Johnson, E. J. 2019. Behavioural Public Policy 3(2), 159-186.

Claim this source supports

“Opt-out defaults tend to produce substantially higher uptake of the pre-selected option than opt-in arrangements, across 58 studies and roughly 73,675 participants, with a medium average effect and meaningful variation between domains.”

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