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Pupil Size Tracks the Effects of Global Context and Semantic Ambiguity on Word-Meaning Processing Cover

Pupil Size Tracks the Effects of Global Context and Semantic Ambiguity on Word-Meaning Processing

By: Julieta Laurino and  Laura Kaczer  
Open Access
|Jul 2025

Figures & Tables

joc-8-1-454-g1.png
Figure 1

Experiment 1 example block. Each global context is followed by two word-associations: one corresponding to the matched condition (e.g., ‘note’) and one to the unmatched condition (e.g., ‘bank’). All words are presented in pseudorandom order across blocks.

joc-8-1-454-g2.png
Figure 2

Experiment 1. Consistency scores of the unmatched and matched context conditions. Each bar provides the mean (±SEM) proportion of associate responses consistent with the context-related meaning across each condition. Points represent the mean consistency for each cue.***p < .0001.

Table 1

Experiment 1. Log-likelihood model comparisons for growth curve analysis.

EFFECTχ2Dfp
Linear polynomial9673.61<.001***
Quadratic polynomial190971<.001***
Cubic polynomial397.321<.001***
Quartic polynomial313.741<.001***
Context (levels: unmatched, matched)65.271<.001***
Context × Linear polynomial34.991<.001***
Context × Quadratic polynomial1.101.29
Context × Cubic polynomial30.441<.001***
Context × Quartic polynomial.861.35

[i] Note. All models included random intercepts for participants and words. Random slopes for the linear, quadratic, and cubic terms were included by participants, and random slopes for the linear, quadratic, cubic, and quartic terms were included by words.

joc-8-1-454-g3.png
Figure 3

Experiment 1. Pupil diameter (EyeLink arbitrary units) over time for the unmatched (red) and matched (green) context conditions. Points represent the raw data means with standard errors, and GCA model fit is overlaid with solid lines. Auditory word onset time is represented as a solid vertical line.

joc-8-1-454-g4.png
Figure 4

Experiment 2 example block. Each global context is followed by three semantic relatedness pairs: one corresponding to the matched context condition, one to the unmatched context condition, and one filler. All words are presented in pseudorandom order across blocks.

joc-8-1-454-g5.png
Figure 5

Experiment 2. Performance on the semantic relatedness task for ambiguous and non-ambiguous words of the unmatched and matched context conditions. Each bar provides the mean (±SEM) across each condition. Points represent the mean for each cue. a) Accuracy (percentage of correct prime-probe relatedness judgments). ###p < .001 (pairwise simple contrasts); **p < .01 (main effect). b) Response times (in milliseconds) for correct responses.***p < .001 (main effect).

Table 2

Experiment 2. Log-likelihood model comparisons for growth curve analysis.

EFFECTχ2DfP
Linear polynomial1557.11<.001***
Quadratic polynomial1958.81<.001***
Cubic polynomial156.341<.001***
Context (levels: unmatched, matched)473.721<.001***
Word type (levels: non-ambiguous, ambiguous)1.1810.28
Context × Word type159.171<.001***
Context × Linear polynomial15.431<.001***
Context × Quadratic polynomial2.461.12
Context × Cubic polynomial1.171.28
Word type × Linear polynomial.371.54
Word type × Quadratic polynomial3.611.058
Word type × Cubic polynomial.031.86

[i] Note. All models included random intercepts for participants and words, and random slopes for the linear, quadratic and cubic terms by both participants and words.

joc-8-1-454-g6.png
Figure 6

Experiment 2. Pupil diameter (EyeLink arbitrary units) over time for ambiguous and non-ambiguous words of the unmatched and matched context conditions. Points represent the raw data means with standard errors, and GCA model fit is overlaid with solid lines. Auditory word onset time is represented as a solid vertical line.

DOI: https://doi.org/10.5334/joc.454 | Journal eISSN: 2514-4820
Language: English
Submitted on: Jan 20, 2025
Accepted on: Jul 7, 2025
Published on: Jul 29, 2025
Published by: Ubiquity Press
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2025 Julieta Laurino, Laura Kaczer, published by Ubiquity Press
This work is licensed under the Creative Commons Attribution 4.0 License.