Research

Majored in psychology, graduated from the University of Turku in 2003, defended PhD in 2011. My biggest research interests have concerned the language processing and development of reading but cool new projects have enlargened my horizons, as you can see. I largely employ eye movement tracking in my studies. As I'm a firm believer of open science, you can find downloads to all of my papers below.

Note: PDF = download

my profile at University of Turku

my profile at Researchgate

Peer-reviewed publications

Olkoniemi, H., Häikiö, T., Laine, M., & Pexman, P. M. (In press). Who gets it? Explaining variability in children’s written irony comprehension. Journal of Child Language.
Melios, S., Crofton, E., Tuccillo, F., Häikiö, T., & Sandell, M. (2026). Visual attention to nitrite-free and plant-based sausages alternatives: Effect of information and cross-cultural differences between Ireland and Finland. Food Quality and Preference, 136, February 2026, 105737. https://doi.org/10.1016/j.foodqual.2025.105737 • PDF
Bertram, R., Rautaoja, T., Holopainen, S., Häikiö, T., Enges, P., Hyönä, J., Lehtonen, M., Pugh, K. R., Rueckl, J. G., Salmela, R., Siegelman, N., & Räsänen, P. (2025). Gender and Home Language Effects on Vocabulary Skills among School Children Aged 9 to 15 in Finland. Scientific Reports, 15, 44832. https://doi.org/10.1038/s41598-025-28902-w • PDF
Kaakinen, J. K., Goodarzi, A. M., Häikiö, T., Kivioja, P., Mäki, K. O., & Pritup, D. (2025). Epistemically suspect beliefs about COVID-19: Results from a Population Survey in Finland. Applied Cognitive Psychology, 39(5): e70117. https://doi.org/10.1002/acp.70117 • PDF
Klimek, M., Karlsson, H., Karlsson, L., Korja, R., Nolvi, S., Häikiö, T. ,Tuulari, J. T., & Kataja, E.-L. (2025). Paternal adverse childhood experiences and offspring’s attentional disengagement from faces at 8 months – Results from the FinnBrain Birth Cohort Study. PLOS ONE 20(7): e0326437. https://doi.org/10.1371/journal.pone.0326437 • PDF
Olkoniemi, H., Häikiö, T., Merinen, M., Manninen, J., Laine, M., & Pexman, P. M. (2025). Learning irony in school: Effects of metapragmatic training. Journal of Child Language, Published online 2025:1-22. https://doi.org/10.1017/S0305000925000054 • PDF
Kaakinen, J. K., Havu-Nuutinen, S., Häikiö, T., Julku, H., Koskela, T., Mikkilä-Erdmann, M., Pihlajamäki, M., Pritup, D., Pulkkinen, K., Saarikivi, K., Simola, J., & Wikström, V. (2025). Science capital: Results from a Finnish population survey. Public Understanding of Science, 34(6), 770-790. https://doi.org/10.1177/09636625241310756 • PDF
Luotola, A., Korja, R., Leppänen, J., Yada, A., Häikiö, T., Lahtela, H., Holmberg, E., Nordenswan, E., Eskola, E., Nolvi, S., Karlsson, H., Karlsson, L., & Kataja, E.-L. (2025). Reciprocal Relationships Between a Child’s Engagement with Faces and Mother-Child Interaction at 8, 30, and 60 Months. Developmental Psychology, 61(5), 964–976. https://doi.org/10.1037/dev0001831 • PDF
Kanerva, O., Häikiö, T., Päällysaho, H., & Kaakinen, J. K. (2024). Impact of awe on topic interest and recognition memory for information in planetarium films. Cognition and Emotion, 39(6), 1340–1350. https://doi.org/10.1080/02699931.2024.2428787 • PDF
Itkonen, S., Häikiö, T., Vainio, S., & Lehtonen, M. (2024). LASTU: A psycholinguistic search tool for Finnish lexical stimuli. Behavior Research Methods, 56, 6165-6178. https://doi.org/10.3758/s13428-024-02347-x • PDF
Eskola, E., Kataja, E.-L., Hyönä, J., Hakanen, H., Nolvi, S., Häikiö, T., Pelto, J., Karlsson, H., Karlsson, L., & Korja, R. (2024). Lower maternal emotional availability is related to increased attention toward fearful faces during infancy. Infant Behavior and Development, 74, March 2024, 101900. https://doi.org/10.1016/j.infbeh.2023.101900 • PDF
Häikiö, T., & Kanerva, O. (2023). Eye movements unveil that iconicity facilitates semantic recognition of onomatopoeic words. Poljarnyj vestnik, 26(November), 1-23. https://doi.org/10.7557/6.6880 • PDF
Eskola, E., Kataja, E.-L., Pelto, J., Tuulari, J. J., Hyönä, J., Häikiö, T., Hessels, R. S., Holmberg, E., Nordenswan, E., Karlsson, H., Karlsson, L., & Korja, R. (2023). Attention biases for emotional facial expressions during a free viewing task increase between 2.5 and 5 years of age. Developmental Psychology, 59(11), 2065-2079. https://doi.org/10.1037/dev0001598 • PDF
Olkoniemi, H., Halonen, S., Pexman, P. M., & Häikiö, T. (2023). Children’s processing of written irony: An eye-tracking study. Cognition, 238, September 2023, 105508. https://doi.org/10.1016/j.cognition.2023.105508 • PDF
Eskola, E., Kataja, E.-L., Hyönä, J., Nolvi, S., Häikiö, T., Carter, A. S., Karlsson, H., Karlsson, L., & Korja, R. (2023). Higher attention bias for fear at 8 months of age is associated with better socioemotional competencies during toddlerhood. Infant Behavior and Development, 71, May 2023, 101838. https://doi.org/10.1016/j.infbeh.2023.101838 • PDF
Schroeder, S., Häikiö, T., Pagán, A., Dickins, J. H., Hyönä, J., & Liversedge, S. P. (2022). Eye movements of children and adults reading in three different orthographies. Journal of Experimental Psychology: Learning, Memory, and Cognition, 48(10), 1518–1541. https://doi.org/10.1037/xlm0001099 • PDF
Laasanen, M., Pajunen, A., & Häikiö, T. (2022). Kielen natiivihallinnan variaatio ja sosiolingvistinen meneillään olevan kielenmuutoksen tutkimus. Virittäjä, 126(3). https://doi.org/10.23982/vir.83371 • PDF
Kataja, E-L., Eskola, E., Pelto, J., Paija, S-P., Nolvi, S., Häikiö, T., Karlsson, L., Karlsson, H., & Leppänen, J. M. (2022). The stability of early-developing attentional bias for faces and fear from 8 to 30 and 60 months. Developmental Psychology, 58(12), 2264–2274. https://doi.org/10.1037/dev0001432 • PDF
Fawcett, C., Nordenswan, E., Yrttiaho, S., Häikiö, T., Korja, R., Karlsson, L., Karlsson, H., & Kataja, E-L. (2022). Individual differences in pupil dilation to others’ emotional and neutral eyes with varying pupil sizes. Cognition and Emotion, 36(5), 928-942. https://doi.org/10.1080/02699931.2022.2073973 • PDF
Aatsinki, A-K., Kataja, E-L., Munukka, E., Lahti, L., Keskitalo, A., Korja, R., Nolvi, S., Häikiö, T., Tarro, S., Karlsson, H., & Karlsson, L. (2022). Infant fecal microbiota composition and attention to emotional faces. Emotion, 22(6), 1159-1170. https://doi.org/10.1037/emo0000924 • PDF
Kanerva, O. & Häikiö, T. (2022). Sound symbolic potential of Russian onomatopoeias: Evidence from eye-tracking. Journal of Experimental Psychology: Learning, Memory, and Cognition, 48(3), 432-445. https://doi.org/10.1037/xlm0001114 • PDF
Häikiö, T. & Luotojärvi, T. (2022). The effect of syllable-level hyphenation on novel word reading in early Finnish readers: Evidence from eye movements. Scientific Studies of Reading, 26(1), 38-46. https://doi.org/10.1080/10888438.2021.1874384 • PDF
Holm, S. K., Häikiö, T., Olli, K., & Kaakinen, J. K. (2021). Eye movements during dynamic scene viewing are affected by visual attention skills and events of the scene: Evidence from first-person shooter gameplay videos. Journal of Eye Movement Research, 14(2). https://doi.org/10.16910/jemr.14.2.3 • PDF
Kataja, E-L., Rodrigues, A. J., Scheinin, N. M., Nolvi, S., Korja, R., Häikiö, T., Ekholm, E., Sousa, N., Karlsson, L., & Karlsson, H. (2021). Prenatal glucocorticoid-exposed infants do not show an age-typical fear bias at 8 months of age – Preliminary findings from the FinnBrain Birth Cohort Study. Frontiers in Psychology, section Developmental Psychology, 12:655654. https://doi.org/10.3389/fpsyg.2021.655654 • PDF
Eskola, E., Kataja, E-L., Hyönä, J., Häikiö, T., Pelto, J., Karlsson, H., Karlsson, L., & Korja. R. (2021). Behavioral regulatory problems are associated with a lower attentional bias to fearful faces during infancy. Child Development, 92(4), 1539-1553. https://doi.org/10.1111/cdev.13516 • PDF
Tuulari, J. J., Kataja, E-L., Leppänen, J., Lewis, J., Nolvi, S., Häikiö, T., Lehtola, S., Hashempour, N., Saunavaara, J., Scheinin, N., Korja, L., Karlsson, L., & Karlsson, H. (2020). Newborn left amygdala volume associates with attention disengagement from fearful faces at eight months. Developmental Cognitive Neuroscience, 45, October 2020, 100839. https://doi.org/10.1016/j.dcn.2020.100839 • PDF
Kataja, E-L., Leppänen, J. M., Kantojärvi, K., Pelto, J., Häikiö, T., Korja, R., Nolvi, S., Karlsson, H., Paunio, T., & Karlsson, L. (2020). The role of TPH2 variant rs4570625 in shaping infant attention to social signals. Infant Behavior and Development, 60, August 2020, 101471. https://doi.org/10.1016/j.infbeh.2020.101471 • PDF
Tervola, M., Vainio. S., & Häikiö, T. (2020). Potilassanaston hallinta terveydenhuoltoalalla: maahanmuuttajataustaisten lääkärien ja asioimistulkkiopiskelijoiden sananmerkityksen tarkkuus. Virittäjä, 124(1). https://doi.org/10.23982/vir.70136 • PDF
Kataja, E-L., Karlsson, L., Leppänen, J. M., Pelto, J., Häikiö, T., Nolvi, S., Pesonen, H., Parsons, C. E., Hyönä, J., & Karlsson, H. (2020). Maternal depressive symptoms during the pre- and postnatal periods and infant attention to emotional faces. Child Development, 91, e475-e480. https://doi.org/10.1111/cdev.13152 • PDF
Kataja. E-L., Karlsson, L., Parsons, C. E., Pelto, J., Pesonen, H., Häikiö, T., Hyönä, J., Nolvi, S., Korja, R., & Karlsson, H. (2019). Maternal pre- and postnatal anxiety symptoms and infant attention disengagement from emotional faces. Journal of Affective Disorders, 243, 280-289. https://doi.org/10.1016/j.jad.2018.09.064 • PDF
Vainio, S., Pajunen, A., & Häikiö, T. (2019). Acquisition of Finnish derivational morphology: school-age children and young adults. First Language, 39(2), 139-157. https://doi.org/10.1177%2F0142723718805185 • PDF
Häikiö, T. & Vainio, S. (2018). Syllables and inflectional morphemes in early Finnish readers: Evidence from eye movements. Journal of Child Language, 45(5), 1227-1245. https://doi.org/10.1017/S0305000918000132 • PDF
Häikiö, T., Heikkilä, T. T., & Kaakinen. J. K. (2018). The effect of syllable-level hyphenation on reading comprehension: Evidence from eye movements. Journal of Educational Psychology, 110(8), 1149-1159. https://doi.org/10.1037/edu0000261 • PDF
Cui, L., Häikiö, T., Zhang, W., Zheng, Y., & Hyönä, J. (2017). Reading monomorphemic and compound words in Chinese. The Mental Lexicon, 12(1), 1-20. https://doi.org/10.1075/ml.12.1.01cui • PDF
Häikiö, T., Bertram, R., & Hyönä, J. (2016). The hyphen as a syllabification cue in reading bisyllabic and multisyllabic words among Finnish 1st and 2nd graders. Reading and Writing, 29(1), 159-182. https://doi.org/10.1007/s11145-015-9584-x • PDF
Häikiö, T., Hyönä, J., & Bertram, R. (2015). The role of syllables in word recognition among beginning Finnish readers: Evidence from eye movements during reading. Journal of Cognitive Psychology, 27(5), 562-577. https://doi.org/10.1080/20445911.2014.982126 • PDF
Häikiö, T., Bertram, R., & Hyönä, J. (2011). The development of whole-word representations in compound word processing: Evidence from eye fixation patterns of elementary school children. Applied Psycholinguistics, 32(3), 533-551. https://doi.org/10.1017/S0142716411000208 • PDF
Blythe, H. I., Häikiö, T., Bertram, R., Liversedge, S. P., & Hyönä, J. (2011). Reading disappearing text: Why do children refixate words? Vision Research, 51(1), 84-92. https://doi.org/10.1016/j.visres.2010.10.003 • PDF
Häikiö, T., Bertram, R., & Hyönä, J. (2010). Development of parafoveal processing within and across words in reading: Evidence from the boundary paradigm. The Quarterly Journal of Experimental Psychology, 63(10), 1982-1998. https://doi.org/10.1080/17470211003592613 • PDF
Häikiö, T., Bertram, R., Hyönä, J., & Niemi, P. (2009). Development of the letter identity span in reading: Evidence from the eye movement moving window paradigm. Journal of Experimental Child Psychology, 102(2), 167-181. https://doi.org/10.1016/j.jecp.2008.04.002 • PDF
Hyönä, J. & Häikiö, T. (2005). Is emotional content picked up of parafoveal words during reading? An eye movement analysis. Scandinavian Journal of Psychology, 46(6), 475-483. https://doi.org/10.1111/j.1467-9450.2005.00479.x • PDF
Moscoso del Prado Martin, F., Bertram, R., Häikiö, T., Schreuder, R., & Baayen, R. H. (2004). Morphological Family Size in a Morphologically Rich Language: The Case of Finnish Compared With Dutch and Hebrew. Journal of Experimental Psychology: Learning, Memory, and Cognition, 30(6), 1271-1278. https://doi.org/10.1037/0278-7393.30.6.1271 • PDF

Thesis

Häikiö, T. (2011). Reading development during elementary school years. Evidence from eye movements. Annales Universitatis Turkuensis, Ser. B, 333. https://urn.fi/URN:ISBN:978-951-29-4614-3 [download at link]