The study was a replication with methodological improvements (multi-centre testing and a double-blind study design) to a previous study (publication 4728). A total of 64 subjects in two independent laboratories performed a short term memory task.
Distance between exposed object and exposure source
0.0337 m
Setup
The mobile phone was mounted on the left side of the subject's head in the normal position of use with an adjustable rubber head cap. The antenna was located over the left posteriortemporal lobe. The distance from the surface of the skull was measured in 12 randomly selected subjects, averaging 33.7 mm (SD 2.57 mm).
No statisticallysignificant differences in performance between the two laboratories were found. The authors could not replicate the previous results: the electromagnetic field had no effect on reaction times or on the accuracy of the subjects' answers. The inability to replicate previous results could have been caused by lack of actual electromagnetic field effects or the magnitude of effects being at the sensitivitythreshold of the test used.
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