Purdue University Graduate School
Peters, 2019, Dissertation, FINAL.pdf (1.36 MB)


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posted on 2019-08-15, 18:09 authored by Ryan PetersRyan Peters
Recent modeling work shows that patterns of shared perceptual features relate to the group-level order of acquisition of early-learned words (Peters & Borovsky, 2019). Here we present results for two eye-tracked word recognition studies showing patterns of shared perceptual features likewise influence processing of known and novel noun-concepts in individual 24- to 30-month-old toddlers. In the first study (Chapter 2, N=54), we explored the influence of perceptual connectivity on both initial attentional biases to known objects and subsequent label processing. In the second study (Chapter 3, N=49), we investigated whether perceptual connectivity influences patterns of attention during learning opportunities for novel object-features and object-labels, subsequent pre-labeling attentional biases, and object-label learning outcomes. Results across studies revealed four main findings. First, patterns of shared (visual-motion and visual-form and surface) perceptual features do relate to differences in early noun-concept processing at the individual level. Second, such influences are tentatively at play from the outset of novel noun-concept learning. Third, connectivity driven attentional biases to both recently learned and well-known objects follow a similar timecourse and show similar patterns of individual differences. Fourth, initial, pre-labeling attentional biases to objects relate to subsequent label processing, but do not linearly explain effects of connectivity. Finally, we consider whether these findings provide support for shared-feature-guided selective attention to object features as a mechanism underlying early lexico-semantic development.


F31 DC017089


Degree Type

  • Doctor of Philosophy


  • Speech, Language, and Hearing Sciences

Campus location

  • West Lafayette

Advisor/Supervisor/Committee Chair

Dr. Arielle Borovsky

Advisor/Supervisor/Committee co-chair

Dr. Laurence Leonard

Additional Committee Member 2

Dr. Amanda Seidl

Additional Committee Member 3

Dr. Brandon Keehn