How Intentional Nights is measured

1. What we measure

One question: out of 100 kids, how many slept last night without a phone in the room?

A night like that is an intentional night. The number is the share of kids under 18 whose night was one, averaged over all the nights reported in the time window (by default the last 90 days). It is an average night, not the figure for one specific night.

• Kid: anyone under 18.
• Phone: a mobile phone. Tablets and watches are not counted.
• In the room: in the room where the kid fell asleep. On a shelf or charging still counts as in the room.
• No phone at all: a kid who has no phone counts as an intentional night.
• Last night: the most recent night that has ended. It is named by its evening date.

A second question measures intent: where do you think the phone should sleep? The gap between what people want and what happened last night is part of the story.

2. The questions

The questionnaire asks, in this order:

1. Who's answering? A parent (about my kids under 18 at home) / A teen (under 18, about myself) / An adult (about myself).
2. Parents: "How many kids under 18 live with you?" and "How many of them slept last night without a phone in the room?" (A child who has no phone at all counts too.)
   Teens and adults: "Where did your phone sleep last night?" In the room I slept in / Outside the room / I don't have a phone.
3. Everyone: "Where do you think the phone should sleep?" Outside the bedroom / In the bedroom / Not sure.

Parents may also give the age bands of their kids. That is optional.

The exact wording on screen is the one in the questionnaire. If this page and the questionnaire ever differ, the questionnaire is the source, and this page is corrected.

3. Who answers

Everyone can answer. Parents answer about their kids. Teens answer about themselves. Adults answer about themselves.

The headline number (kids) uses parents and teens. Adults are a second, separate number.

4. How answers arrive

• Web: the anonymous questionnaire at beeritzori.com/gii.
• Field: short street interviews. Answers are written down without names. An answer we are unsure about is checked by hand before it counts.
• Events: the same questions, answered at talks and events.
• ZUZA: people who use the ZUZA app can choose to share. Only national totals per night arrive, never a user. This is a separate layer. It is never mixed into the headline number.

Web, field and event answers count in the headline. Every answer keeps its source tag, and every view can be filtered by source.

Disclosure: Beeri Tzori also founded ZUZA, a company that makes a phone dock. That is why ZUZA data stays a separate layer, and why the questions and this method are public.

5. How the number is computed

Each parent answer adds their kids. Each teen answer adds one kid. Then:

GII = 100 × (kids with an intentional night) ÷ (all kids reported), rounded.

Example: a parent of 3 kids, 2 without a phone in the room, plus a teen whose phone slept outside the room: 3 of 4 kids, so 75.

The intent figure is the share of all answers that said "outside the room".

Your own result (what you want against what happened) is shown to you once, on your screen. It is not stored.

6. The 10-answer threshold

A country shows a number only after at least 10 answers for that series (kids or adults) and time window. Until then it shows how many answers were collected.

Ten is a floor against noise, not a guarantee of accuracy. Between 10 and 99 answers the number carries the label "early estimate": with 10 answers the true share can be about 30 points away in either direction.

7. Time windows

• Last 90 days: the default view. It follows change.
• All time: every answer since the start.
• Weekly trend: answers grouped by week (ISO weeks).

8. Country

The country is suggested from the network the answer comes from. Only the two-letter country code is kept. You can correct it before you answer. Field answers use the country the person said they live in.

The borders on the map follow the de-facto view of Natural Earth, the public-domain dataset the map is drawn from. They are not a political statement.

9. Versions

This is method v1. Every answer is stored with the version it was given under. A change to a question or a definition creates a new version, and numbers from different versions are not mixed without saying so.

10. Known biases

• Self-selection: people who care about phones at night are more likely to answer.
• Online audience: web answers come from people who reached this site, mostly through social media.
• Tourists and vacation nights: some street interviews were with families on vacation. A night away from home is not a typical night. These answers are tagged.
• Parents and teens report differently: a parent may not know where the phone was. A teen answers for one person only.
• Network country is not home country: travellers and VPN users can be counted in the wrong country unless they correct it.
• Small numbers: even above 10 answers, one country can move a lot from week to week.
• Social desirability: some people give the answer they think is right, not what happened.

This is not a representative survey of any country. It is a public count of the answers we have.

11. Privacy

We don't store your IP address, email, cookies or any device ID. We keep only your answers, your country, the questionnaire language and where you came from (for example a QR code). The time is rounded to the hour. Kids can answer too, so nothing that identifies a person is collected. Privacy notice.

12. Open data

There is no download yet. Today we publish country numbers and the map. Opening the anonymous data is a later decision.