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Area of Science:

  • Neuroscience
  • Public Health
  • Psychology

Background:

  • Adolescent smoking initiation is linked to higher dependence.
  • Graphic health warnings (GHWs) are used to deter smoking.
  • The impact of GHW size on adolescent inhibitory control is not well understood.

Purpose of the Study:

  • To evaluate the effect of different GHW sizes on adolescent inhibitory control.
  • To test the hypothesis that larger GHWs enhance inhibitory control.

Main Methods:

  • Fifty-nine adolescents completed a Go/No-Go task with electroencephalographic recording.
  • Stimuli included cigarette packs with 0%, 30%, and 60% GHWs.
  • Analyzed N200 event-related potential and behavioral accuracy.

Main Results:

  • GHWs increased N200 amplitude, with 60% coverage showing the greatest effect.
  • Behavioral data indicated higher accuracy in No-Go trials with 60% GHWs.
  • This suggests enhanced inhibitory control with larger GHWs.

Conclusions:

  • GHWs effectively increase inhibitory control in adolescents.
  • A 60% GHW coverage is more effective than 30% or no GHW.
  • Larger GHWs can be a valuable public health strategy to reduce adolescent smoking.