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Saccadic reaction times in infants and adults: Spatiotemporal factors, gender, and interlaboratory variation.
Department of Psychology, Oxford Brookes University, UK.
Linköping University, Department of Behavioural Sciences and Learning, Psychology. Linköping University, Faculty of Arts and Sciences.ORCID iD: 0000-0001-8738-979X
School of Medicine, University of Tampere, Finland.
Department of Psychology, Uppsala University, Sweden.
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2017 (English)In: Developmental Psychology, ISSN 0012-1649, E-ISSN 1939-0599, Vol. 53, no 9, 1750-1764 p.Article in journal (Refereed) Published
Abstract [en]

Saccade latency is widely used across infant psychology to investigate infants’ understanding of events. Interpreting particular latency values requires knowledge of standard saccadic RTs, but there is no consensus as to typical values. This study provides standard estimates of infants’ (n = 194, ages 9 to 15 months) saccadic RTs under a range of different spatiotemporal conditions. To investigate the reliability of such standard estimates, data is collected at 4 laboratories in 3 countries. Results indicate that reactions to the appearance of a new object are much faster than reactions to the deflection of a currently fixated moving object; upward saccades are slower than downward or horizontal saccades; reactions to more peripheral stimuli are much slower; and this slowdown is greater for boys than girls. There was little decrease in saccadic RTs between 9 and 15 months, indicating that the period of slow development which is protracted into adolescence begins in late infancy. Except for appearance and deflection differences, infant effects were weak or absent in adults (n = 40). Latency estimates and spatiotemporal effects on latency were generally consistent across laboratories, but a number of lab differences in factors such as individual variation were found. Some but not all differences were attributed to minor procedural differences, highlighting the importance of replication. Confidence intervals (95%) for infants’ median reaction latencies for appearance stimuli were 242 to 250 ms and for deflection stimuli 350 to 367 ms. (PsycINFO Database Record (c) 2017 APA, all rights reserved)

Place, publisher, year, edition, pages
American Psychological Association (APA), 2017. Vol. 53, no 9, 1750-1764 p.
Keyword [en]
Eye Movements, Infant Development, Reaction Time, Spatial Ability, Human Sex Differences, Object Recognition
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Psychology
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URN: urn:nbn:se:liu:diva-142756DOI: 10.1037/dev0000338ISI: 000414264000012PubMedID: 28682097Scopus ID: 2-s2.0-85021839350OAI: oai:DiVA.org:liu-142756DiVA: diva2:1154253
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Note

Funding agencies: Norwegian Directorate for Children, Youth and Family Affairs [13/60525]; Knut and Alice Wallenberg Foundation [KAW.2012.0120]; Swedish Council for Working Life and Social Research [2008-0875]; Swedish Research Council [2011-1913]; European Research Counci

Available from: 2017-11-02 Created: 2017-11-02 Last updated: 2017-11-28Bibliographically approved

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Koch, Felix-SebastianSundqvist, Anett (Annette)Heimann, Mikael

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