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When Time and Numerosity Interfere: The Longer the More, and the More the Longer

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  • Amir Homayoun Javadi
  • Clarisse Aichelburg

Abstract

There is strong evidence that magnitudes in different dimensions can interfere. A majority of previous studies on the interaction of temporal magnitudes on numerosity showed no interfering effect, while many studies have reported the interference of numerosity on judgement of temporal magnitudes. We speculated that this one-way interference is confounded by the magnitudes used in the studies. We used a methodology that allowed us to study this interaction reciprocally. Moreover, we selected magnitudes for two dimensions that enabled us to detect their interfering effects. Participants had to either judge which of two successive sets of items was more numerous (numerosity judgement task), or which set of items was presented longer (duration judgement task). We hypothesised that a longer presentation of a set will be judged as being more numerous, and vice versa, a more numerous set will be judged as being presented longer. Results confirmed our hypothesis. A positive correlation between duration of presentation and judged numerosity as well as a positive correlation between the number of items and judged duration of presentation was found. This observation supports the idea that duration and numerosity judgements are not completely independent and implies the existence of (partly) generalised and abstract components in the magnitude representations.

Suggested Citation

  • Amir Homayoun Javadi & Clarisse Aichelburg, 2012. "When Time and Numerosity Interfere: The Longer the More, and the More the Longer," PLOS ONE, Public Library of Science, vol. 7(7), pages 1-9, July.
    • Handle: RePEc:plo:pone00:0041496
    DOI: 10.1371/journal.pone.0041496
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    Cited by:

    1. Nadine Schlichting & Ritske de Jong & Hedderik van Rijn, 2018. "Robustness of individual differences in temporal interference effects," PLOS ONE, Public Library of Science, vol. 13(8), pages 1-19, August.
    2. Isabell Winkler & Madlen Glauer & Tilmann Betsch & Peter Sedlmeier, 2015. "The Impact of Attention on Judgments of Frequency and Duration," PLOS ONE, Public Library of Science, vol. 10(5), pages 1-21, May.
    3. Zhenguang G Cai & Ruiming Wang, 2014. "Numerical Magnitude Affects Temporal Memories but Not Time Encoding," PLOS ONE, Public Library of Science, vol. 9(1), pages 1-9, January.
    4. Anna Lambrechts & Vincent Walsh & Virginie van Wassenhove, 2013. "Evidence Accumulation in the Magnitude System," PLOS ONE, Public Library of Science, vol. 8(12), pages 1-10, December.
    5. Amir Homayoun Javadi & Clarisse Aichelburg, 2013. "Training Enhances the Interference of Numerosity on Duration Judgement," PLOS ONE, Public Library of Science, vol. 8(1), pages 1-8, January.

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