@article{661dc77927b84208adeca68bf5359e6d,
title = "Infants{\textquoteright} sensitivity to shape changes in 2D visual forms",
abstract = "Research in developmental cognitive science reveals that human infants perceive shape changes in 2D visual forms that are repeatedly presented over long durations. Nevertheless, infants{\textquoteright} sensitivity to shape under the brief conditions of natural viewing has been little studied. Three experiments tested for this sensitivity by presenting 128 seven-month-old infants with shapes for the briefer durations under which they might see them in dynamic scenes. The experiments probed infants{\textquoteright} sensitivity to two fundamental geometric properties of scale- and orientation-invariant shape: relative length and angle. Infants detected shape changes in closed figures, which presented changes in both geometric properties. Infants also detected shape changes in open figures differing in angle when figures were presented at limited orientations. In contrast, when open figures were presented at unlimited orientations, infants detected changes in relative length but not in angle. The present research therefore suggests that, as infants look around at the cluttered and changing visual world, relative length is the primary geometric property by which they perceive scale- and orientation-invariant shape.",
keywords = "angle, change detection, invariance, length, shape perception",
author = "Dillon, {Moira R.} and V{\'e}ronique Izard and Spelke, {Elizabeth S.}",
note = "Funding Information: This work was supported by the Center for Brains, Minds and Machines (CBMM), a National Science Foundation Technology Center (CCF‐1231216), the National Science Foundation (DGE‐1144152 to MRD; DRL‐1348140 to ESS), and a Starting Grant from the European Research Council (MathConstruction 263179 to VI). This study contributes to the IdEx Universit{\'e} de Paris ANR‐18‐IDEX‐0001. We thank the Institute for Quantitative Social Sciences at Harvard University for assistance with programming the stimulus‐presentation software and V. Chan, R. Guzman, N. Kalra, and E. Wheaton for assistance with data collection and coding. The authors declare no conflicts of interest. Funding Information: This work was supported by the Center for Brains, Minds and Machines (CBMM), a National Science Foundation Technology Center (CCF-1231216), the National Science Foundation (DGE-1144152 to MRD; DRL-1348140 to ESS), and a Starting Grant from the European Research Council (MathConstruction 263179 to VI). This study contributes to the IdEx Universit? de Paris ANR-18-IDEX-0001. We thank the Institute for Quantitative Social Sciences at Harvard University for assistance with programming the stimulus-presentation software and V. Chan, R. Guzman, N. Kalra, and E. Wheaton for assistance with data collection and coding. The authors declare no conflicts of interest. Publisher Copyright: {\textcopyright} 2020 International Congress of Infant Studies (ICIS)",
year = "2020",
month = sep,
day = "1",
doi = "10.1111/infa.12343",
language = "English (US)",
volume = "25",
pages = "618--639",
journal = "Infancy",
issn = "1525-0008",
publisher = "Wiley-Blackwell",
number = "5",
}