（罗马13日综合电）发表于《自然-人类行为》的一项意大利跟踪研究显示，青少年开通首个社交媒体帐号的年龄越早，标准化考试成绩表现越差，部分学业差距还会随时间持续拉大。
该研究由意大利米兰比科卡大学研究团队完成，样本覆盖意大利北部28所学校共5227名学生。研究数据显示，11至12岁，也就是六年级就开设社交媒体帐号的学生，到八年级时，意大利语成绩较14至15岁（九年级及以后）才开通帐号的同龄人低0.22个标准差，数学成绩低0.18个标准差。
按照研究团队的测算，0.2个标准差大致相当于6个月的在校学习差距。报导称，这种差距并不会随年龄增长自然消失。到了十年级，早开帐号学生的意大利语成绩仍比其他学生低0.22个标准差，数学成绩差距进一步扩大至0.27个标准差。
研究进一步显示，频繁翻看手机的孩子，往往可能更早注册社交媒体，且在15或16岁时意大利语和数学成绩可能较低。他们使用社交媒体时受到父母的监督也较少。
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