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Intrinsic Reward Modulates Word Learning in Both Oral and Written Contexts Cover

Intrinsic Reward Modulates Word Learning in Both Oral and Written Contexts

Open Access
|Apr 2026

Figures & Tables

Figure 1

A. Schematic overview of block structure, illustrating the sentence congruency manipulation (congruent: M+, yellow; incongruent: M–, blue). Each block comprised 2 pairs of M+ sentences and 2 pairs of M– sentences presented randomly. Participants were presented with the ‘first’ sentence from all sentence pairs (pink outlines), before encountering the second sentence of the pair (green outlines). B. Schematic illustration of the trial structure. C. Schematic outline of the recognition trial.

Figure 2

Accuracy and memory by congruency and modality. The figure displays the means of accuracy (left panel) and memory (right panel) across different modalities, separated by Congruency (M– vs. M+). Error bars represent ±1 standard error (SE).

Table 1

Generalized Linear Mixed-Effects Results for Accuracy. Z-values in bold indicate that the effect is significant. The final model fitted to the accuracy data was Accuracy ~ Congruency + Modality + Congruency:Modality + (1 + Congruency | Participant) + (1 | Item) + (0 + Congruency | Item).

MEASUREFIXED EFFECTbSE95% CIz-valuep-value
Memory(intercept)–0.060.12–.29,.17–0.520.602
Congruency–0.500.07–.64, –.36–7.00<.001
Modality: Listening–0.060.14–.34, .21–0.450.652
Modality: Listening + Reading0.200.14–.08,.471.400.161
Congruency * Modality (Listening)–0.400.08–.56, –.24–4.96<.0001
Congruency * Modality (Listening + Reading)0.010.08–.15, .170.110.912
RANDOM EFFECTSVARIANCESDCORRELATION
Participant(intercept)0.2550.505
Word(intercept)0.1120.334
Type: M–0.0830.288
Type: M+0.2410.491–.15
Table 2

Generalized Linear Mixed-Effects Results for Memory. The final model fitted to the memory data was Memory ~ Congruency + Modality + Congruency:Modality + (1 + Congruency | Participant) + (1 + Congruency | Item).

MEASUREFIXED EFFECTbSE95% CIz-valuep-value
Accuracy(Intercept)–0.110.07–.25, .02–1.640.102
Congruency (incongruent)–0.050.08–.21, .11–0.600.547
Modality: Listening–0.200.09–.38, –.02–2.220.026
Modality: Listening + Reading0.160.10–.31, .351.640.101
Congruency * Modality (Listening)–0.040.09–.22, .15–0.410.683
Congruency * Modality (Listening + Reading)–0.030.10–.23,.16–0.340.732
RANDOM EFFECTSVARIANCESDCORRELATION
Participant(intercept)0.1600.400
Congruency0.1990.4460.18
Word(intercept)0.0050.068
List 10.0870.2940.02
Table 3

Generalized Linear Mixed-Effects Results for Enjoyment using Day 1 Accuracy. The final model fitted to the accuracy data was Enjoyment ~ Congruency + Accuracy + Modality + Congruency:Accuracy + Accuracy:Modality + (1 | Participant) + (1 | Item).

MEASUREFIXED EFFECTbSE95% CIz-valuep-value
Enjoyment(Intercept)4.870.224.44, 5.3022.40<.0001
Congruency–0.070.02–0.10, –0.04–4.27<.0001
Accuracy–0.020.03–0.07, 0.03–0.790.432
Modality (Reading and Listening)0.190.32–0.45, 0.830.590.553
Modality (Listening)0.070.32–0.57, 0.700.210.836
Congruency * Accuracy0.200.020.17, 0.2311.70<.0001
Accuracy*Modality (RL)–0.080.04–0.15, 0.00–1.900.057
Accuracy*Modality (L)0.030.04–0.04, 0.110.810.416
RANDOM EFFECTSVARIANCESD
Participant(intercept)1.941.39
Word(intercept)0.010.09
Figure 3

Estimated marginal means of enjoyment by Accuracy, Congruency and Modality.

The figure displays the estimated marginal means (EMMs) of enjoyment as a function of Accuracy (“Incorrect” vs. “Correct”) and Congruency (M– vs. M+), with separate panels for each Modality. Error bars show ±1 standard error (SE).

Table 4

Generalized Linear Mixed-Effects Results for Enjoyment using Day 2 Memory. The final model fitted to the memory data was Enjoyment ~ Congruency + Memory + Modality + Congruency:Memory + (1 | Participant) + (1 | Item).

MEASUREFIXED EFFECTbSE95% CIz-valuep-value
Enjoyment(Intercept)4.980.204.59, 5.3825.10<.0001
Congruency–0.300.03–.35, –.25–11.00<.0001
Memory–0.040.03–.09, .01–1.600.110
Modality (Reading and Listening)–0.080.29–.66, .49–0.280.782
Modality (Listening)0.300.30–.29, .891.010.316
Congruency * Accuracy0.070.03.02, .122.700.007
RANDOM EFFECTSVARIANCESD
Participant(intercept)1.541.24
Word(intercept)0.010.10
Figure 4

Estimated marginal means of enjoyment by Memory, Congruency and Modality.

The figure displays the estimated marginal means (EMMs) of enjoyment as a function of Memory (“Forgotten” vs. “Remembered” 24 hours later) and Congruency (M– vs. M+), with separate panels for each Modality (however, note there is no difference by modality). Error bars show ±1 standard error (SE).

Figure 5

Enjoyment and confidence by congruency, outcome, and modality.

The figure displays the means of enjoyment (left panel) and confidence (right panel) separated by Congruency (M– vs. M+) and outcome (Correct, Incorrect meaning inferred, and incorrectly rejected). The different modalities are shown in different colouts (Red: Reading, Green: Listening and Purple: Reading and Listening). Error bars represent ±1 standard error (SE).

Figure 6

Enjoyment and confidence by congruency, outcome and memory.

The figure displays the means of enjoyment separated by Congruency (M– vs. M+) and outcome (Correct, Incorrect meaning inferred, and incorrectly rejected). The different memory conditions are shown in different colours (Black: Forgotten, Green: Remembered). Error bars represent ±1 standard error (SE).

DOI: https://doi.org/10.5334/joc.499 | Journal eISSN: 2514-4820
Language: English
Page range: 28 - 28
Submitted on: Apr 20, 2026
Accepted on: Apr 20, 2026
Published on: Apr 30, 2026
Published by: Ubiquity Press
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2026 Haniya Zaka, Samuel Evans, Pablo Ripollés, Saloni Krishnan, published by Ubiquity Press
This work is licensed under the Creative Commons Attribution 4.0 License.