Impact of Environmental Nudges on Dietary Quality

Healthfulness of product selections (operationalized as products' Nutri-Score scores). Products' Nutri-Score scores are calculated using the updated 2022 algorithm released by the Scientific Committee of the Nutri-Score (ScC). Scores range from -15 (Nutri-Score of "A") to 40 (Nutri-Score of "E"), with lower scores indicating a more healthful product selection.

Carbon footprint of product selections [operationalized as products' greenhouse gas emissions (GHGE) per 100g].

Acceptability of eco-labels on products, measured by an item adapted from Vargas-Meza et al., 2019. Likert responses are on a 1 to 5 scale, from "Not at all" (coded as 1) to "A great deal" (coded as 5), with higher scores representing a higher acceptability of eco-labels.

Acceptability of environmental swaps, measured by an item adapted from Vargas-Meza et al., 2019. Likert responses are on a 1 to 5 scale, from "Not at all" (coded as 1) to "A great deal" (coded as 5), with higher scores representing a higher acceptability of swaps.

Acceptability of peer comparison messages, measured by an item adapted from Vargas-Meza et al., 2019. Likert responses are on a 1 to 5 scale, from "Not at all" (coded as 1) to "A great deal" (coded as 5), with higher scores representing a higher acceptability of peer comparison messages.

How much the participant reports thinking about the healthfulness of products when making selections. Likert responses are on a 1 to 5 scale, from "Not at all" (coded as 1) to "A great deal" (coded as 5), with higher scores representing a higher amount of thinking about the healthfulness of products.

How much the participant reports thinking about the taste of products when making selections. Likert responses are on a 1 to 5 scale, from "Not at all" (coded as 1) to "A great deal" (coded as 5), with higher scores representing a higher amount of thinking about the taste of products.

How much the participant reports thinking about the cost of products when making selections. Likert responses are on a 1 to 5 scale, from "Not at all" (coded as 1) to "A great deal" (coded as 5), with higher scores representing a higher amount of thinking about the cost of products.

How much the participant reports thinking about the environmental sustainability of products when making selections. Likert responses are on a 1 to 5 scale, from "Not at all" (coded as 1) to "A great deal" (coded as 5), with higher scores representing a higher amount of thinking about the environmental sustainability of products.

Participants' perceptions about the healthfulness of sustainable products. Likert responses are on a 1 to 5 scale, from "Not at all" (coded as 1) to "Extremely" (coded as 5), with higher scores representing a higher perceived healthfulness of sustainable products.

Participants' perceptions about the healthfulness of unsustainable products. Likert responses are on a 1 to 5 scale, from "Not at all" (coded as 1) to "Extremely" (coded as 5), with higher scores representing a higher perceived healthfulness of unsustainable products.

Participants' perceptions about the sustainability of sustainable products. Likert responses are on a 1 to 5 scale, from "Not at all" (coded as 1) to "Extremely" (coded as 5), with higher scores representing a higher perceived sustainability of sustainable products.

Participants' perceptions about the sustainability of unsustainable products. Likert responses are on a 1 to 5 scale, from "Not at all" (coded as 1) to "Extremely" (coded as 5), with higher scores representing a higher perceived sustainability of unsustainable products.

Participants' intentions to purchase a sustainable product in the next month. Likert responses are on a 1 to 5 scale, from "Not at all likely" (coded as 1) to "Extremely likely" (coded as 5), with higher scores representing a higher intention to purchase.

Participants' intentions to purchase an unsustainable product in the next month. Likert responses are on a 1 to 5 scale, from "Not at all likely" (coded as 1) to "Extremely likely" (coded as 5), with higher scores representing a higher intention to purchase.

Participants' perceived approval from people important in their life for purchasing environmentally sustainable products. Likert responses are on a 1 to 5 scale, from "Strongly disagree" (coded as 1) to "Strongly agree" (coded as 5), with higher scores representing higher perceived approval about purchasing environmentally sustainable products.

Participants' belief that most shoppers purchase environmentally sustainable foods when shopping for groceries. Likert responses are on a 1 to 5 scale, from "Strongly disagree" (coded as 1) to "Strongly agree" (coded as 5), with higher scores representing higher belief that most shoppers purchase environmentally sustainable foods.