研究のタイプ: 医学／生物学の研究 (experimental study)

[人の注意力に対する携帯電話放射電磁界のばく露時間の影響] med./bio.

The effect of the duration of exposure to the electromagnetic field emitted by mobile phones on human attention

著者: Lee TM, Lam PK, Yee LT, Chan CC
掲載誌: NeuroReport 2003; 14 (10): 1361-1364
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この研究は、先行研究での知見（携帯電話から放射される電磁界は、ヒトの注意力の促進効果を持つ）を前提に、このような注意促進効果と携帯電話電磁界へのばく露時間との関係を調べた。78人の大学生を無作為にばく露群または対照群に割り当て、注意タスクの遂行成績を比較した。その結果、2つの注意タスクのうちの一つで、対照群に比べ、ばく露群の成績の方が高かったが、それは、ばく露後にタスクを実施した場合に限られた；さらに、この一時的な促進効果には用量依存性があるかもしれないことが示された、と報告している。

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研究目的（著者による）

To examine the effect of electromagnetic fields emitted by mobile phones on human attention by investigating the relationship between the duration of irradiation and the effect of electromagnetic field.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 1.9 GHz
Modulation type: pulsed
ばく露時間: continuous for 25 min
-

ばく露1

主たる特性
周波数 1.9 GHz
タイプ
  • electromagnetic field
ばく露時間 continuous for 25 min
Modulation
Modulation type pulsed
ばく露装置
ばく露の発生源／構造
  • セルラ－電話
ばく露装置の詳細 Mobile phone was mounted on the subject's head. Mobile phone was oriented in the normal position for use with the earphone over the right ear of the subject.
Additional information Mobile phones were off with the control group throughout the session of 60 min.
パラメータ

No parameters are specified for this exposure.

ばく露を受けた生物:

方法 影響評価項目／測定パラメータ／方法

研究対象とした生物試料:
調査の時期:
  • ばく露中

研究の主なアウトカム（著者による）

Subjects in the experimental group appear to become somewhat faster than subjects in the control group in responding to the SART after being exposed to the electromagnetic field. Yet, there were no significant differences in the number of correct responses on the SART, indicating that there was no observable change in the quality of performance of the subjects. The absence of significant difference on the scores on the TMT may suggest that an increased duration of irradiation may have a differential impact on different human attention functions, or it might relate to the possibility that the effect on the performance in the TMT tests might take longer times for it to be noticeable. The data seem to suggest that attention functions may be differentially enhanced with an increased duration of exposure to the electromagnetic field. Furthermore, this transient facilitation effect might be dose dependent.

研究の種別:

研究助成

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