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INTRODUCTION: The majority of smokers begin consumption in adolescence and the earlier initiation of cigarette smoking is associated with a greater likelihood of cigarette dependence. Graphic health warnings (GHW) are one of the most used strategies to communicate the consequences of cigarette smoking, but little is known about their ability to increase inhibitory control and thus prevent consumption. The objective of the present study was to evaluate the effects of different sizes of GHWs on inhibitory control in adolescents. We hypothesized that GHWs promote inhibitory control, and increasing GHW size, enhance inhibitory control. METHODS: Fifty-nine participants completed a Go/No-Go task during electroencephalographic recording. The No-Go stimuli were pictures of cigarette packs without GHWs, and cigarette packs with GHWs that covered 30% or 60% of the front (main side) of the pack. The event-related potential N200 component and behavioral measures in the Go/No-Go task were analyzed. RESULTS: Separate mixed-model analysis of variance (ANOVAs) were used for N200 component (amplitude and latency) and behavioral data. The GHWs increased the amplitude of the N200 potential, especially GHWs that covered 60% of the front of the pack. The behavioral data showed that GHWs that covered 60% of the front of the pack generated higher a percentage of accuracy in No-Go trials (ie, fewer commission errors). CONCLUSIONS: These results suggest that GHWs increase inhibitory control in adolescents, especially when the GHWs cover 60% of the front of the cigarette pack. IMPLICATIONS: GHWs with an increased size (60% of the front of the cigarette pack vs. 30%, the minimum size, proposed by the World Health Organization) recruit additional cognitive resources and thus can effectively increase inhibitory control both in adolescent smokers and nonsmokers. Accordingly, the use of larger GHW has the potential of becoming an effective public policy strategy to inhibit smoking in adolescents.

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Resumen Los estudios experimentales de la emoción y la motivación se han desarrollado de forma más frecuente con imágenes, sonidos y videos, sin embargo, son pocos los trabajos que han estudiado la respuesta emocional y motivacional ante las palabras, las cuales son estímulos que guían significativamente nuestra interacción social. Por lo anterior, el objetivo de la presente investigación fue identificar la capacidad que tienen las palabras para generar estados emocionales y las posibles diferencias entre hombres y mujeres. Para esto se llevó a cabo un estudio con 232 personas y se utilizaron 15 palabras con contenido afectivo, las cuales fueron evaluadas en las dimensiones de valencia, arousal y dominancia. Los resultados muestran que las palabras agradables, en especial aquellas con contenido sexual generan una valencia apetitiva, alto arousal y alta dominancia, y las palabras desagradables generan una valencia aversiva, bajo arousal y baja dominancia. Solo se encontraron diferencias significativas entre hombres y mujeres en la valencia de las palabras desagradables y el arousal de las palabras agradables.

Abstract The experimental studies of emotion and motivation have developed more often with pictures, sounds and videos; however, few studies have addressed the emotional and motivational response to the words, which are stimuli that guide significantly our social interaction. Therefore, the objective of this research was to identify the words capacity to generate emotional states and differences between men and women. For this we conducted a study with 232 persons and used 15 words with affective content which were evaluated in the dimensions of valence, arousal and dominance. The results show that pleasant words, especially those with sexual content generate an appetitive valence, high arousal and high dominance, and unpleasant words generate an aversive valence, low arousal and low dominance. Significant differences between men and women only found in valence of unpleasant words and in arousal of the pleasant words.

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