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Working memory load affects early affective responses to concrete and abstract words differently: Evidence from ERPs

  • Conrad PerryEmail author
  • Aaron T. Willison
  • Megan K. Walker
  • Madeleine C. Nankivell
  • Lee M. Lawrence
  • Alexander Thomas
Article

Abstract

Early posterior negativity (EPN) is an early-occurring, event-related, potential that is elicited by pictures and words that have highly arousing characteristics. Whilst EPN has been found with words presented in isolation several times, different types of words have shown quite different effects across different types of tasks. One possible reason for this is that memory and attentional demands may affect the way semantic features of words are processed, and this may modulate EPN. This was investigated in a silent reading task using abstract and concrete words of negative and neutral valence and a dual phonological working memory task to manipulate memory load. The results showed that abstract but not concrete words elicited EPN, and this may have affected downstream processing. Further analyses examining alpha desynchronization showed that negative concrete words appeared to be significantly affected by the memory load manipulation, unlike negative abstract words. These results provide evidence that the processing of features in negative concrete words is more affected by working memory and attentional demands than the processing of features in negative abstract words, and this may be responsible for the failure of negative concrete words to elicit EPN in this study. Thus, the extent to which words elicit EPN appears to be dependent on both their semantic representations and competing cognitive processes. These results provide a potential explanation for some of the differences that have been reported in previous experiments as well as insight into how memory and attention can affect the processing of the semantic features of words.

Keywords

Early posterior negativity Concreteness Emotion Working memory Reading 

Notes

Supplementary material

13415_2018_686_MOESM1_ESM.bmp (2.6 mb)
Fig. S1 Grand mean ERPs elicited by negative and neutral words in example electrodes in the four possible conditions. Topographic maps are difference scores (negative minus neutral) averaged across each of the three time-windows (BMP 2700 kb)
13415_2018_686_MOESM2_ESM.bmp (2.6 mb)
Fig. S2 Grand mean ERPs elicited in high and low memory load conditions in example electrodes in the four possible conditions. Topographic maps are difference scores (high minus low) averaged across each of the three time-windows (BMP 2700 kb)
13415_2018_686_MOESM3_ESM.bmp (2.6 mb)
Fig. S3 Grand mean ERPs elicited by concrete and abstract words in example electrodes in the four possible conditions. Topographic maps are difference scores (abstract minus concrete) averaged across each of the three time-windows (BMP 2700 kb)
13415_2018_686_MOESM4_ESM.bmp (5.2 mb)
Fig. S4 Example lower alpha envelopes. Thick lines represent low memory load conditions and thin lines high memory load conditions; only the top half of the envelope is shown and the X-axis starts at 1.15 μV. Note: HNegAbs = High load negative abstract; HNeuAbs = High load neutral abstract; HNegCon = High load negative concrete; HNeuCon = High load neutral concrete; LNegAbs = Low load negative abstract; LNeuAbs = Low load neutral abstract; LNegCon = Low load negative concrete; LNeuCon = Low load neutral concrete (BMP 5357 kb)
13415_2018_686_MOESM5_ESM.bmp (5.2 mb)
Fig. S5 Example upper alpha envelopes. Thick lines represent low memory load conditions and thin lines high memory load conditions; only the top half of the envelope is shown and the X-axis starts at .4μV. Note: HNegAbs = High load negative abstract; HNeuAbs = High load neutral abstract; HNegCon = High load negative concrete; HNeuCon = High load neutral concrete; LNegAbs = Low load negative abstract; LNeuAbs = Low load neutral abstract; LNegCon = Low load negative concrete; LNeuCon = Low load neutral concrete (BMP 5357 kb)

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Copyright information

© The Psychonomic Society, Inc. 2019

Authors and Affiliations

  • Conrad Perry
    • 1
    Email author
  • Aaron T. Willison
    • 1
  • Megan K. Walker
    • 1
  • Madeleine C. Nankivell
    • 1
  • Lee M. Lawrence
    • 1
  • Alexander Thomas
    • 1
  1. 1.Faculty of Health, Arts and Design, Department of Psychological ScienceSwinburne University of TechnologyHawthornAustralia

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