この研究は、携帯電話使用期間が5年未満（第1群）、5年以上（第2群）、使用経験なし（第3群）の被験者を募集し（各群30人：聴覚正常を確認）、各人の事象関連電位を測定した。第1、2群は大学生から募集できたが、第3群に該当する大学生は3人しか集まらず、大学の清掃などの就業者から追加募集した。その結果、N100、P200、N200、P300の潜時、N2-P300振幅における3群間の有意差は観察されなかった、と報告している。
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The effects of chronic mobile phone usage on cognition should be investigated.
90 volunteers aged 17-25 years with normal hearing were divided into 3 groups according to their duration of mobile phone use (n=30 each): 1) subjects who had used mobile phones for less than five years, 2) subjects who had used mobile phones for more than five years and 3) subjects who had never used a mobile phone.
Data from two trials were obtained and averaged.
subjects were using mobile phones primarily to make phone calls, while text messaging and use of the internet constituted less than 20% of their total mobile phone use; 47% of the subjects used their mobile phone for 30 to 60 minutes per day; all were using handsets and none used Bluetooth
No significant differences in any parameter were found between the groups.
The authors conclude that chronic mobile phone usage has no detrimental effect on cognition. However, further studies with larger numbers of subjects and with a longer duration of exposure are needed to substantiate these results.
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