Yuko Okumura, Ph.D.

Research Scientist
Child Development Research Group
Innovative Communication Lab
NTT Communication Science Laboratories

Contact Information:
yuko.okumura (at) ntt.com
2-4 Hikaridai, Seika, Souraku, Kyoto
619-0237, JAPAN

Research Interests

  • Cognitive Development
  • Language Development


  • Journal Paper
  • Invited paper

Journal Paper

  1. Okumura, Y., Taguchi, S., & Kanakogi, Y. (2024).
    How are mental state references represented in English and Japanese picture books? An analysis of the frequency of emotional and cognitive words and their relation to the self or others.
    Social Development. https://doi.org/10.1111/sode.12731 [link]
  2. Okumura, Y., Hattori, T., Fujita, S., & Kobayashi, T. (2023).
    A robot is watching me!: Five-year-old children care about their reputation after interaction with a social robot.
    Child Development. https://doi.org/10.1111/cdev.13903 [link]
  3. Okumura, Y. & Kobayashi, T. (2023).
    Do infants understand educational television content based on scientific findings?
    Journal of Experimental Child Psychology, 229, 105620. https://doi.org/10.1016/j.jecp.2022.105620 [link]
  4. Okumura, Y., Oshima-Takane, Y., Kobayashi, T., Ma, M., & Kayama, Y. (2023).
    Comprehension of null and pronominal object sentences in Japanese-speaking children.
    Language Learning and Development, 19(2), 151-166. https://doi.org/10.1080/15475441.2022.2050235 [link]
  5. Okumura, Y., & Kobayashi, T. (2022).
    Effects of maternal picture book knowledge on language development of 15-month-olds.
    Infant and Child Development, 31(2), e2291. https://doi.org/10.1002/icd.2291 [link]
  6. Shinohara, A., Kanakogi, Y., Okumura, Y., & Kobayashi, T. (2022).
    Children manage their reputation by caring about gossip.
    Social Development, 31(2), 455-465. https://doi.org/10.1111/sode.12548 [link]
  7. Shinohara, A., Kanakogi, Y., Okumura, Y., & Kobayashi, T. (2021).
    The impact of positive and negative testimony on children's attitudes toward others.
    PLoS ONE, 16(12): e0261075. https://doi.org/10.1371/journal.pone.0261075 [link]
  8. Okumura, Y., & Kobayashi, T. (2021).
    Contingent experience with touchscreens promotes parent-child conversations.
    Cognitive Development, 60, 101100. https://doi.org/10.1016/j.cogdev.2021.101100 [link]
  9. Higuchi, H., Okumura, Y., & Kobayashi, T. (2021).
    An eye-tracking study of letter-sound correspondence in Japanese-speaking 2- to 3-year-old toddlers.
    Scientific Reports, 11, 1659. https://doi.org/10.1038/s41598-020-79062-y [link]
  10. Shinohara, A., Kanakogi, Y., Okumura, Y., & Kobayashi, T. (2020).
    How do children evaluate the gossiper of negative gossip?
    Japanese Psychological Research, 63(2), 111-117. https://doi.org/10.1111/jpr.12279 [link]
  11. Okumura, Y., Kanakogi, Y., Kobayashi, T., & Itakura, S. (2020).
    Ostension affects infant learning more than attention.
    Cognition, 195, 104082. https://doi.org/10.1016/j.cognition.2019.104082 [link]
  12. Moriguchi, Y., Kanakogi, Y., Okumura, Y., Shinohara, I., Itakura, S., & Shimojo, S. (2019).
    Imaginary agents exist perceptually for children but not for adults.
    Palgrave Communications, 5, 133. https://doi.org/10.1057/s41599-019-0350-6 [link]
  13. Ikeda, A., Okumura, Y., Kobayashi, T., & Itakura, S. (2018).
    Children passively allow other's rule violations in cooperative situations.
    Scientific Reports, 8: 6843. https://doi.org/10.1038/s41598-018-25210-4 [link]
  14. Okumura, Y., Kanakogi, Y., Kobayashi, T., & Itakura, S. (2017).
    Individual differences in object-processing explain the relationship between early gaze-following and later language development.
    Cognition, 166, 418-424. https://doi.org/10.1016/j.cognition.2017.06.005 [link]
  15. Okumura, Y., Kobayashi, T., & Itakura, S. (2016).
    Eye contact affects object representation in 9-month-old infants.
    PLoS ONE 11(10): e0165145. https://doi.org/10.1371/journal.pone.0165145 [link]
  16. Moriguchi, Y., Kanakogi, Y., Todo, N., Okumura, Y., Shinohara, I., & Itakura, S. (2016).
    Goal attribution toward non-human objects during infancy predicts imaginary companion status during preschool years.
    Frontiers in Psychology, 7:221. https://doi.org/10.3389/fpsyg.2016.00221 [link]
  17. Okumura, Y., Kanakogi, Y., Kanda, T., Ishiguro, H., & Itakura, S. (2013).
    Can infants use robot gaze for object learning? The effect of verbalization.
    Interaction Studies, 14(3), 351-365. https://doi.org/10.1075/is.14.3.03oku [link]
  18. Kanakogi, Y., Okumura, Y., Inoue, Y., Kitazaki, M., & Itakura, S. (2013).
    Rudimentary sympathy in preverbal Infants: Preference for others in distress.
    PLoS ONE. 8(6): e65292. https://doi.org/10.1371/journal.pone.0065292 [link]
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  19. Okumura, Y., Kanakogi, Y., Kanda, T., Ishiguro, H., & Itakura, S. (2013).
    Infants understand the referential nature of human gaze but not robot gaze.
    Journal of Experimental Child Psychology, 116(1), 86-95. https://doi.org/10.1016/j.jecp.2013.02.007 [link]
  20. Okumura, Y., Kanakogi, Y., Kanda, T., Ishiguro, H., & Itakura, S. (2013).
    The power of human gaze on infant learning.
    Cognition, 128(2), 127-133. https://doi.org/10.1016/j.cognition.2013.03.011 [link]
  21. Siegal, M., Surian, L., Matsuo, A., Geraci, A., Iozzi, L., Okumura, Y., & Itakura, S. (2010).
    Bilingualism accentuates children's conversational understanding.
    PLoS ONE. 5(2): e9004. https://doi.org/10.1371/journal.pone.0009004 [link]
  22. Moriguchi, Y., Okumura, Y., Kanakogi, Y., & Itakura, S. (2010).
    Japanese children's difficulty with false belief understanding: Is it real or apparent?
    Psychologia, 53(1), 36-43. https://doi.org/10.2117/psysoc.2010.36 [link]

Invited paper

  1. Okumura, Y., Kobayashi, T., & Oshima-Takane, Y. (2016).
    Child Language Development: The Differences between Japanese and English.
    NTT Technical Review, vol.14, no.11, 1-7, Nov. 2016.
  2. Hattori, T., Kobayashi, T., Fujita, S., Okumura, Y., & Aoyama, K. (2016).
    Pitarie: Picture Book Search with Interdisciplinary Approach.
    NTT Technical Review, vol.14, no.7, 1-8, July 2016.

Invited paper