An application of media and network multiplexity theory to the structure and perceptions of information environments in hurricane evacuation

Internet, phone, mail and mixed-mode surveys: the tailored design method: reseña

Abstract: Resena de la obra de Don A. Dillman, Jolene D. Smyth y Leah Melani Christian: Internet, Phone, Mail and Mixed-Mode Surveys. The Tailored Design Method. New Jersey: John Wiley and Sons

Characteristics of Organizational Environments and Perceived Environmental Uncertainty.

Abstract: Twenty-two decision groups in three manufacturing and three research and development organizations are studied to identify the characteristics of the environment that contribute to decision unit members experiencing uncertainty in decision making.' Two dimensions of the environment are identified. The simple-complex dimension is defined as the number of factors taken into consideration in decision making. The static-dynamic dimension is viewed as the degree to which these factors in the decision unit's environment remain basically the same over time or are in a continual process of change. Results indicate that individuals in decision units with dynamic-complex environments experience the greatest amount of uncertainty in decision making. The data also indicate that the static-dynamic dimension of the environment is a more important contributor to uncertainty than the simple-complex dimension.

Cognitive control in media multitaskers.

Abstract: Chronic media multitasking is quickly becoming ubiquitous, although processing multiple incoming streams of information is considered a challenge for human cognition. A series of experiments addressed whether there are systematic differences in information processing styles between chronically heavy and light media multitaskers. A trait media multitasking index was developed to identify groups of heavy and light media multitaskers. These two groups were then compared along established cognitive control dimensions. Results showed that heavy media multitaskers are more susceptible to interference from irrelevant environmental stimuli and from irrelevant representations in memory. This led to the surprising result that heavy media multitaskers performed worse on a test of task-switching ability, likely due to reduced ability to filter out interference from the irrelevant task set. These results demonstrate that media multitasking, a rapidly growing societal trend, is associated with a distinct approach to fundamental information processing.

Internet, phone, mail and mixed-mode surveys: the tailored design method: reseña

Abstract: Resena de la obra de Don A. Dillman, Jolene D. Smyth y Leah Melani Christian: Internet, Phone, Mail and Mixed-Mode Surveys. The Tailored Design Method. New Jersey: John Wiley and Sons

On Network Theory

Abstract: Research on social networks has grown considerably in the last decade. However, there is a certain amount of confusion about network theory — for example, what it is, what is distinctive about it, and how to generate new theory. This paper attempts to remedy the situation by clarifying the fundamental concepts of the field (such as the network) and characterizing how network reasoning works. We start by considering the definition of network, noting some confusion caused by two different perspectives, which we refer to as realist and nominalist. We then analyze two well-known network theories, Granovetter’s strength of weak ties, to identify characteristic elements of network theorizing. We argue that both theories share an underlying theoretical model, which we label the network flow model, from which we derive additional implications. We also discuss network phenomena that do not appear to fit the flow model and discuss the possibility of a second fundamental model, which we call the bond model. We close with a discussion of the merits of model-based network theorizing for facilitating the generation of new theory, as well as a discussion of endogeneity in network theorizing.

Facing the Unexpected: Disaster Preparedness and Response in the United States

Abstract: Facing the Unexpected presents the wealth of information derived from disasters around the world over the past 25 years. The authors explore how these findings can improve disaster programs, identify remaining research needs, and discuss disaster within the broader context of sustainable development. How do different people think about disaster? Are we more likely to panic or to respond with altruism? Why are 110 people killed in a Valujet crash considered disaster victims while the 50,000 killed annually in traffic accidents in the U.S. are not? At the crossroads of social, cultural, and economic factors, this book examines these and other compelling questions. The authors review the influences that shape the U.S. governmental system for disaster planning and response, the effectiveness of local emergency agencies, and the level of professionalism in the field. They also compare technological versus natural disaster and examine the impact of technology on disaster programs.