When less is more and when more is more: The mediating roles of capacity and speed in brain-behavior efficiency

An enduring enterprise of experimental psychology has been to account for individual differences in human performance. Recent advances in neuroimaging have permitted testing of hypotheses regarding the neural bases of individual differences but this burgeoning literature has been characterized by inconsistent results. We argue that careful design and analysis of neuroimaging studies is required to separate individual differences in processing capacity from individual differences in processing speed to account for these differences in the literature. We utilized task designs which permitted separation of processing capacity influences on brain-behavior relationships from those related to processing speed. In one set of studies, participants performed verbal delayed-recognition tasks during blocked and event-related fMRI scanning. The results indicated that those participants with greater working memory (WM) capacity showed greater prefrontal cortical activity, strategically capitalized on the additional processing time available in the delay period, and evinced faster WM-retrieval rates than low-capacity participants. In another study, participants performed a digit-symbol substitution task (DSST) designed to minimize WM storage capacity requirements and maximize processing speed requirements during fMRI scanning. In some prefrontal cortical (PFC) brain regions, participants with faster processing speed showed less PFC activity than slower performers while in other PFC and parietal regions they showed greater activity. Regional-causality analysis indicated that PFC exerted more influence over other brain regions for slower than for faster individuals. These results support a model of neural efficiency in which individuals differ in the extent of direct processing links between neural nodes. One benefit of direct processing links may be a surplus of resources that maximize available capacity permitting fast and accurate performance.     

Validating age-related functional imaging changes in verbal working memory with acute stroke

Functional imaging studies consistently find that older adults recruit bilateral brain regions in cognitive tasks that are strongly lateralized in younger adults, a characterization known as the Hemispheric Asymmetry Reduction in Older Adults model. While functional imaging displays what brain areas are active during tasks, it cannot demonstrate what brain regions are necessary for task performance. We used behavioral data from acute stroke patients to test the hypothesis that older adults need both hemispheres for a verbal working memory task that is predominantly left-lateralized in younger adults. Right-handed younger (age ? 50, n = 7) and older adults (age > 50, n =21) with acute unilateral stroke, as well as younger (n =6) and older (n =13) transient ischemic attack (TIA) patients, performed a self-paced verbal item-recognition task. Older patients with stroke to either hemisphere had a higher frequency of deficits in the verbal working memory task compared to older TIA patients. Additionally, the deficits in older stroke patients were mainly in retrieval time while the deficits in younger stroke patients were mainly in accuracy. These data suggest that bihemispheric activity is necessary for older adults to successfully perform a verbal working memory task.     

Eschewing Community: Black Metal

There is a great deal of literature that examines community orientations, in particular consumption‐based subcultures rooted in the appreciation of music scenes such as heavy metal and its subgenres. Much of this literature focuses on aspects of community maintenance, reaffirmation of shared identities and building of social bonds. In the present article, we report a study in which consumption of, and fandom in a specific scene in extreme metal, namely black metal, may lead to very unique consumer cultural orientations. Our analyses reveal that black metal fans' identities reside in a realm outside of a desired collective identification and tightly knit community, but rather one that uses signification, or representational means to convey meaning and belonging, as a way to signal repugnance with society and a reverence of individuality. The study engages a mixed qualitative approach utilizing interviews, observational research and content analysis to demonstrate how self‐identity related to the black metal music scene can thrive through an ideological and semiotic rejection of traditional community orientations seen in the majority of other extreme metal music scenes. This paper challenges traditional conceptualizations of group identity in music scenes by closely examining aspects of signification and fandom in black metal that represent a unique system of shared identities devoid of community building. Copyright © 2014 John Wiley & Sons, Ltd.     

What Makes for a Good Life? A Four-Nation Study

How do we assess the value of our lives? What makes the life we live a good or worthy one in our own eyes? What are its aims? The answers to these questions are implicit in the often unarticulated commitments by which people define their selves, purposes, and actions. These commitments structure the moral framework that guides our everyday qualitative distinctions and positions us within a unified narrative of continuity and change. The substantive conception of a good life, we argue, presupposes but is not reducible to a set of basic values. As an initial exploration of cultural variation, Canadian, Chinese, Indian, and Japanese university students were compared on what they held to be most important for assessing the worth of their lives. The results revealed considerable commonality of content with notable differences consistent with the cultural ethos of each group.     

A Longitudinal Field Investigation of Gender Differences in Individual Technology Adoption Decision-Making Processes

This research investigated gender differences in the overlooked context of individual adoption and sustained usage of technology in the workplace using the theory of planned behavior (TPB). User reactions and technology usage behavior were studied over a 5-month period among 355 workers being introduced to a new software technology application. When compared to women's decisions, the decisions of men were more strongly influenced by their attitude toward using the new technology. In contrast, women were more strongly influenced by subjective norm and perceived behavioral control. Sustained technology usage behavior was driven by early usage behavior, thus fortifying the lasting influence of gender-based early evaluations of the new technology. These findings were robust across income, organization position, education, and computer self-efficacy levels. Copyright 2000 Academic Press.     

Individual Reactions to New Technologies in the Workplace: The Role of Gender as a Psychological Construct

Using the theory of planned behavior (TPB), individual reactions to a new technology and technology usage behavior were studied over a 12-month period among 552 employees being introduced to a new computer-based system in the workplace. When considering gender as a psychological construct by employing Bern's Sex Role Inventory (BSRI), important distinctions were revealed. Specifically, masculine gender-typed individuals exhibited the same pattern as did men in previous research; feminine gender-typed individuals were different from women in that they were influenced only by subjective norm and PBC. The balanced decision-making process was observed only in the case of individuals categorized as androgynous. The high percentage of women who tested to be androgynous explains the divergence in results from the previous work, and provides evidence of changing gender roles for women in today's organizations and society.     

Perceiving images and telling tales: A visual and verbal analysis of the meaning of the internet

This paper uses visual and verbal analysis to delve into the multi-faceted ways in which individuals construct their own meanings and shape their own experiences with the Internet. We build on the Zaltman Metaphor Elicitation Technique, and the principles of visual rhetoric to show how perceptual processes affect picture choices, and how these choices contribute to the narrative imagination. Numerous perceptual principles [abstraction, concept formation, perceptual problem solving, constancy, closure, symmetry and balance]are identified in the choice and organization of visual images. The argument we make is that images and words (visual and textual processes) provide deeper insights into our understanding of consumer online experiences.     

Food for thought: a study of food consumption in postmodern US culture

• The objective of this research is to examine the symbolic meanings of contemporary food consumption and provide an in‐depth understanding of related practices. Specifically, we view food as a prominent cultural category representative of postmodernism and approach our study using a postmodern perspective. The paper provides an insight into how US consumers relate to food and highlights the symbolic dimension of food in a culture that is often depicted as highly individualistic. Offering a theoretical framework rooted in an ethnographic account of food consumption we uncover its postmodern complexities that take into account social, cultural, and contextual dimensions. Food is discussed in the context of relationships, desire, and a globalized commodity.

Copyright © 2007 John Wiley & Sons, Ltd.