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Psychomotor performance is not influenced by brief repeated exposures to mobile phones.

Bioelectromagnetics · 2008 · No effect · Low evidence

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No effectLow evidencePaper 5034

In 24 subjects, the study did not detect cumulative effects of three brief repeated GSM mobile phone exposures (902.40 MHz; SAR 0.5 W/kg) on psychomotor performance as measured by reaction time and finger tapping tasks. A non-statistical trend toward shorter …

Study snapshot

PublicationBioelectromagnetics · 2008
Study typeother
Reported directionNo effect
Evidence ratingLow

Abstract

The present study investigated the presence of a cumulative effect of brief and repeated exposures to a GSM mobile phone (902.40 MHz, 217 Hz modulated; peak power of 2 W; average power of 0.25 W; SAR = 0.5 W/kg) on psychomotor functions. To this end, after each of 3 15-min exposures, both an acoustic simple reaction time task (SRTT) and a sequential finger tapping task (SFTT) were administered to 24 subjects. The present study was unable to detect the cumulative effects of brief and repeated EMF exposure on human psychomotor performance, although there was a non-statistical trend to shorter reaction times. In summary, these data show an absence of effects with these particular exposure conditions; however, possible cognitive effects induced by different signal characteristics cannot be excluded.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeother
Effect directionno_effect
Population24 subjects
Sample size24
ExposureRF · 902.4 MHz · 0.5 W/kg · 3 × 15-min exposures
Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

In 24 subjects, the study did not detect cumulative effects of three brief repeated GSM mobile phone exposures (902.40 MHz; SAR 0.5 W/kg) on psychomotor performance as measured by reaction time and finger tapping tasks. A non-statistical trend toward shorter reaction times was noted.

Outcomes measured

  • Psychomotor performance
  • Acoustic simple reaction time task (SRTT)
  • Sequential finger tapping task (SFTT)

Limitations

  • Small sample size (24 subjects)
  • Only brief, repeated exposures were tested (3 × 15 min)
  • Findings limited to the specific GSM signal characteristics and exposure conditions used
View raw extracted JSON
{
  "study_type": "other",
  "exposure": {
    "band": "RF",
    "source": "mobile phone",
    "frequency_mhz": 902.4,
    "sar_wkg": 0.5,
    "duration": "3 × 15-min exposures"
  },
  "population": "24 subjects",
  "sample_size": 24,
  "outcomes": [
    "Psychomotor performance",
    "Acoustic simple reaction time task (SRTT)",
    "Sequential finger tapping task (SFTT)"
  ],
  "main_findings": "In 24 subjects, the study did not detect cumulative effects of three brief repeated GSM mobile phone exposures (902.40 MHz; SAR 0.5 W/kg) on psychomotor performance as measured by reaction time and finger tapping tasks. A non-statistical trend toward shorter reaction times was noted.",
  "effect_direction": "no_effect",
  "limitations": [
    "Small sample size (24 subjects)",
    "Only brief, repeated exposures were tested (3 × 15 min)",
    "Findings limited to the specific GSM signal characteristics and exposure conditions used"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "GSM",
    "mobile phone",
    "RF EMF",
    "902.40 MHz",
    "217 Hz modulation",
    "SAR 0.5 W/kg",
    "psychomotor",
    "reaction time",
    "finger tapping",
    "cumulative effect"
  ],
  "suggested_hubs": []
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1002/bem.20393
PubMed: 18163437

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