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title: SNS・動画の視聴時間、長いほど成績低く 中3半数が1日3時間以上 - 日本経済新聞
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source: google
category: news/domestic
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region: JP
tags:
- business
- 日本経済新聞
lang: ja
published_at: '2026-08-03T08:00:00Z'
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updated_at: '2026-08-03T14:58:49Z'
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# SNS・動画の視聴時間、長いほど成績低く 中3半数が1日3時間以上 - 日本経済新聞

## TL;DR
（要約なし・原文はリンク先を参照 / No summary available; see the source link.）

## Key Points
- business / 日本経済新聞

## Details
(本文なし。リンク先参照)

## Source
元記事: [SNS・動画の視聴時間、長いほど成績低く 中3半数が1日3時間以上 - 日本経済新聞](https://news.google.com/rss/articles/CBMibEFVX3lxTE1nOUNILTZIZ0ZjRHRIbG5oWUMyQVJzVlhvTWwxZDhlUzcxZGFVVEpWbmM0VG5zeE9DQkFHT19POExIS1piS2RybUtNdE13ZkF0YWQ4MG1lbzlCM2tkelRxcXhDbVpxOHRpNGR4TA?oc=5) — published 2026-08-03T08:00:00Z