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      A comparison of equivalent noise methods in investigating local and global form and motion integration

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      Author(s)
      Pavan, A.
      Contillo, A.
      Koç, Şeyma
      Kafalıgönül, Hulusi
      Donato, R.
      O’Hare, L.
      Date
      2022-11-15
      Source Title
      Attention, Perception, & Psychophysics
      Print ISSN
      1943-3921
      Publisher
      Springer New York LLC
      Volume
      83
      Issue
      1
      Pages
      152 - 165
      Language
      English
      Type
      Article
      Item Usage Stats
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      12
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      Abstract
      Static and dynamic cues within certain spatiotemporal proximity are used to evoke respective global percepts of form and motion. The limiting factors in this process are, first, internal noise, which indexes local orientation/direction detection, and, second, sampling efficiency, which relates to the processing and the representation of global orientation/direction. These parameters are quantified using the equivalent noise (EN) paradigm. EN has been implemented with just two levels: high and low noise. However, when using this simplified version, one must assume the shape of the overall noise dependence, as the intermediate points are missing. Here, we investigated whether two distinct EN methods, the 8-point and the simplified 2-point version, reveal comparable parameter estimates. This was performed for three different types of stimuli: random dot kinematograms, and static and dynamic translational Glass patterns, to investigate how constant internal noise estimates are, and how sampling efficiency might vary over tasks. The results indicated substantial compatibility between estimates over a wide range of external noise levels sampled with eight data points, and a simplified version producing two highly informative data points. Our findings support the use of a simplified procedure to estimate essential form-motion integration parameters, paving the way for rapid and critical applications to populations that cannot tolerate protracted measurements.
      Keywords
      Internal noise
      Sampling efficiency
      Form-motion integration
      Equivalent noise methods
      Permalink
      http://hdl.handle.net/11693/111787
      Published Version (Please cite this version)
      https://doi.org/10.3758/s13414-022-02595-z
      Collections
      • Aysel Sabuncu Brain Research Center (BAM) 249
      • National Magnetic Resonance Research Center (UMRAM) 301
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