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Song, Joo-Hyun

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Song

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Joo-Hyun

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Song, Joo-Hyun
Author's Publications: search.filters.isAuthorOfPublication.728328db-66b6-46f4-af69-145e8ff14352

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    Engaging the Motor System with Masked Orthographic Primes: A Kinematic Analysis
    (Taylor & Francis, 2008) Finkbeiner, Matthew; Song, Joo-Hyun; Nakayama, Ken; Caramazza, Alfonso
    We report two experiments in which participants categorized target words (e. g., BLOOD or CUCUMBER) according to their canonical colour of red or green by pointing to a red square on the left or a green square on the right. Unbeknownst to the participants, the target words were preceded by the prime words "red'' or "green''. We found that the curvature of participants' pointing trajectories was greater following incongruent primes (green-BLOOD) than it was following congruent primes, indicating that individuals initiated a response on the basis of the prime and then corrected that response mid-flight. This finding establishes that the processing of masked orthographic stimuli extends down to include the formulation of an overt manual response.
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    Numeric Comparison in a Visually-guided Manual Reaching Task
    (Elsevier, 2008) Song, Joo-Hyun; Nakayama, Ken
    Nearly all studies on perception and cognition have used discrete responses to infer internal cognitive processes. In the current study, we demonstrate that visually-guided manual reaching can provide new opportunities to access internal processes over time. In each trial, participants were required to compare a single digit Arabic number presented on the center square with the standard, 5. Participants were asked to reach and touch one of three squares on the screen with their index finger while their hand movement trajectories were recorded: the left square for 1-4, the center for 5, and the right for 6-9. Direct evidence for an analogue representation of numbers was found in early as well as in later portions of hand trajectories, showing systematic shifts in position for small differences in numerical magnitude.