A peek under the bonnet - when and where are nudges effective?
paper (Löfgren & Nordblom, 2020) proposing a theoretical framework of decision
making explaining the mechanisms of nudging by mapping out decisions on two
axes: importance of the decision to the person and their confidence in making
the right choice
When making a decision, we – or our brains – compare the benefits of making an
effort or not, and the risks of getting it wrong. We might decide it’s not worth
the effort because we already (feel like) we have enough knowledge in this
situation, or because it doesn’t really matter that much even if we got it
wrong.
Although our goal is to maximise the benefits, it often takes a lot of cognitive
effort to work out what the right choice is so our brains ‘cheat’ by making
decisions on gut feel, our previous choices (habit) or by using heuristics.
According to the authors, decisions in the bottom quadrants C and D are most likely to be influenced by nudges of two kinds**:Pure nudges that change something in a choice situation that is seemingly irrelevant to the choice itself (most effective in quadrant C)Preference nudges that change the perceived value in a choice situation without actually changing the attentive choice. (most effective in quadrant D)
Commonly used pure nudges are default options and framing (e.g., placing apples at eye level) while preference nudges commonly include social-norm messages of others’ behaviour (e.g., a note in the shower indicating the share of hotel guests who reuse their towels).