<span>El e-Commerce es un fenómeno creciente en Latinoamérica y Colombia por lo que el estudio de su aceptación tecnológica es de alta importancia académica y empresarial. El objetivo de este artículo es identificar los antecedentes de la intención de uso de e-Commerce en Colombia. El Modelo de Aceptación Tecnológica (TAM), es complementado en este estudio con los constructos de Confianza y Seguridad Percibida para proponer un modelo ajustado al caso colombiano. Dicho modelo es contrastado empíricamente con una muestra de consumidores de la ciudad de Medellín. Se evidencia la importancia de la confianza y la utilidad percibida como antecedentes directos de la intención de uso del e-Commerce. Los resultados llenan vacíos existentes en la literatura sobre el e-Commerce en Colombia y permiten identificar implicaciones empresariales relevantes para el desarrollo de actividades comerciales a través de la Internet</span>

RESUMENEste artículo analiza el comportamiento de aceptación tecnológica de la publicidad móvil en Colombia, utilizando el modelo TAM (Technology Acceptance Model) y adicionando el concepto de confianza como variable que influye en la relación entre anunciantes y receptores de la publicidad móvil. El modelo planteado fue contrastado mediante una muestra empírica de 530 individuos, se comprobó la fiabilidad y validez del mismo y se validaron las hipótesis mediante ecuaciones estructurales. Para el caso de los consumidores colombianos, los resultados demuestran el ajuste del modelo y confirman que la confianza influye directamente en la intención de uso; sin embargo, la utilidad percibida se constituye como el principal determinante del uso de la publicidad móvil. PALABRAS CLAVEPublicidad, Dispositivos móviles, Aceptación tecnológica, TAM, Marketing. CLASIFICACIÓN JEL M31, M37CONTENIDO Introducción, 1. Modelo de Aceptación Tecnológica, 2. La confianza en la publicidad móvil, 3. Modelo propuesto, 4. Metodología, 5. Resultados, 6. Conclusiones, Bibliografía. Bernardo Ballesteros Díaz -Juan Fernando Tavera Mesías -Daniela Castaño Serna 134 Universidad de Medellín TECHNOLOGICAL ACCEPTANCE OF ADVERTISING IN MOBILE DEVICES IN COLOMBIA ABSTRACTThis article looks for analyzing the behavior of technological acceptance of advertising in mobile devices in Colombia, using TAM model (Technology Acceptance Model) and adding the confidence as a variable which influences in the relation between advertisers and sectors or mobile advertising. The model was contrasted through an empirical sample of 530 individuals; reliability and validity of the model was verified and hypothesis were validated by means of structural equations. In the case of Colombian consumers, results show the adjustment of the model and confirm that the confidence directly influences in the use intention; however, the usefulness perceived, constitutes as the main dewterminant of use of mobile advertising.

Objective The use of illicit drugs has increased dramatically over the past two decades among Hispanics. Neurocognitive impairments and morphological alterations have been linked to the use of drugs among the Hispanic population. However, even when increased attention is paid to the impact of drug consumption on neurocognitive functions among Hispanics, the majority of publications have been limited to male samples. This is relatively important, considering that women who consume illicit drugs appear to be more vulnerable in developing drug dependence and exhibit more neurocognitive impairment when compared to men. The present study aims to determine the impact of drug consumption in the visual-motor integration in a sample of Puerto Rican women. Our hypothesis was that Puerto Rican women who consume illicit drugs would perform poorly on visual-motor integration when compared to non-consumers. Participants and Method A total of 59 Puerto Rican women participated in this cross-sectional study. The participants were divided into three groups according to the criteria of: consumers, non-consumers, and abstinence. To evaluate the visual-motor integration, we administered the neuropsychological Bender-Gestalt-II test to all participants. Results A Kruskal-Wallis analysis revealed that there was a statically significant difference in the visual-motor integration between groups (H(2) = 12.69, p = 0.02), with a mean rank of 28 for consumers, 40 for non-consumers, and 21 for abstinence group. However, there was no significant difference between the abstinence and consumer groups in their visual-motor integration (p = .217). Conclusions These results suggest that the use of drugs can impact some neurocognitive functions, such as visual-motor integration in women, and can lead to a decline in such functions- even after sustained abstinence.