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206 results

Page 1 of 11

  • A Network Approach for Evaluating Coherence in Multivariate Systems: An Application to Psychophysiological Emotion Data

  • Fushing Hsieh, Emilio Ferrer, Shuchun Chen, Iris B. Mauss, Oliver John, James J. Gross
  • Journal:
    Psychometrika / Volume 76 / Issue 1 / January 2011
    Published online by Cambridge University Press:
    01 January 2025, pp. 124-152

  • We present an approach for evaluating coherence in multivariate systems that considers all the variables simultaneously. We operationalize the multivariate system as a network and define coherence as the efficiency with which a signal is transmitted throughout the network. We illustrate this approach with time series data from 15 psychophysiological signals representing individuals’ moment-by-moment emotional reactions to emotional films. First, we summarize the time series through nonparametric Receiver Operating Characteristic (ROC) curves. Second, we use Spearman rank correlations to calculate relationships between each pair of variables. Third, based on the obtained associations, we construct a network using the variables as nodes. Finally, we examine signal transmission through all the nodes in the network. Our results indicate that the network consisting of the 15 psychophysiological signals has a small-world structure, with three clusters of variables and strong within-cluster connections. This structure supports an effective signal transmission across the entire network. When compared across experimental conditions, our results indicate that coherence is relatively stronger for intense emotional stimuli than for neutral stimuli. These findings are discussed in relation to multivariate methods and emotion theories.

The Citizen of the World
  • Oliver Goldsmith
  • Edited by James Watt
  • Published online:
    22 October 2024
    Print publication:
    07 November 2024
  • The Citizen of the World is a highly readable yet deceptively sophisticated text, using the popular eighteenth-century device of the imaginary observer. Its main narrator, the Chinese philosopher Lien Chi Altangi, draws on traditional ideas of Confucian wisdom as he tries (and sometimes fails) to come to terms with the commercial modernity and spectacle of imperial London. Goldsmith explores a moment of economic and social transformation in Britain and at the same time engages with the ramifications of a global conflict, the Seven Years' War (1756–63). He also uses his travelling Chinese narrator as a way of indirectly addressing his own predicament as an Irish exile in London. This edition provides a reliable, authoritative text, records the history of its production, and includes an introduction and explanatory notes which situate this enormously rich work within the political debates and cultural conflicts of its time, illuminating its allusiveness and intellectual ambition.

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