MAP20071504035 Scherer, Clifford W. A Social network contagion theory of risk perception / Clifford W. Scherer and Hichang Cho Risk perceptions have, to a great extent, been studied exclusively as individual cognitive mechanisms in which individual collect, process, and form perceptions as atomized units unconnected to a social system. En: Risk analysis : an international journal. - New York and London : Society for Risk Analysis. - Vol. 23, nº 2, April, 2003 ; p. 261-267 1. Percepción del riesgo . 2. Comunicación . 3. Sistemas de comunicación . 4. Relaciones humanas . 5. Comportamiento social . I. Cho, Hichang . II. Title.