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柳叶刀:儿童每天使用电子设备超2小时 有损大脑

2018-10-20 06:02:35 来源: 红星新闻
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柳叶刀:儿童每天使用电子设备超2小时 有损大脑

当代儿童及青少年从小就被智能手机、平板电脑等电子设备环绕,然而,太多的屏幕时间直接导致其认知能力发展受损。如何防止孩子认知能力受损,提高脑力呢?

据《纽约时报》报道,《柳叶刀儿童与青少年健康》杂志发表的新研究显示,保证三种日常行为可让儿童拥有更高的脑力:每天运动至少60分钟,每天保证9-11小时睡眠,以及每天不超过2小时的电子设备使用时间。 该研究对4524名8到11岁儿童做了六种标准测试,其中包括对语言能力、记忆力、计划能力,以及完成脑力任务的速度等多方面能力的测评。

同时满足三种行为标准的孩子在上述能力测试中所获综合分数比其他孩子高4%。满足睡眠和电子设备使用时间这两项的孩子测试分数比一条都不满足的孩子要高5.1%,甚至超过了满足三条的孩子表现。这说明,睡眠和电子设备使用时间同孩子的认知能力发展最直接相关,效果最为明显。而运动时间同身体健康更直接相关。

该研究作者英属哥伦比亚大学博士后杰瑞米·沃尔什指出:“睡眠是大脑的重要行为。孩子需要9到11个小时的睡眠,才能让其认知能力的发展达到最佳状态。”而电子设备的使用时间会对睡眠产生负面影响。此外,电子设备刺激大脑的方式不同于阅读等其他活动,刺激效果不如其他活动。然而,多达63%的孩子每天电子设备使用时间超过2小时。

4000多名孩子中,只有5%的被试孩子能同时满足这3条标准,25%的孩子能达到2条,41%的孩子仅达到一条,还有多达30%的孩子连一条标准都达不到,着实令人忧虑。

杨卉 本文来源:红星新闻 责任编辑:杨卉_NQ4978
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