Published online: 27 Apr 2020The goal of the paper was to investigate whether morphological units –
stems and suffixes – influence orthographic processing by modulating
visual attention demands to the task. Orthographic processing was measured
with a visual one-back task requiring letters to be detected within
pseudowords not including stems/suffixes, or containing real stems or real
suffixes. Fourth grade children (between 9.5 and 10.5 years old) who read in
a transparent orthography of a morphologically rich and agglutinative
language (Basque) were tested. The results showed that the presence of
morphemes in the strings did not improve letter detection performance
though it slightly modulated the distribution of visual attention, showing
a bias toward the processing of central letters in the presence of a stem. We
suggest that the presence of highly regular and recurrent structures prioritizes
stem identification, which when achieved, reduces visual attention
deployment across the remaining letters.The authors acknowledge financial support from the Basque Government (PRE_2015_2_0049 to A. A.), the European
Research Council (ERC-2011-ADG-295362 to M.C.), the Spanish Ministry of Economy and Competitiveness
(PSI20153653383P to M.L., PSI20153673533R to M. C, and SEV-2015-490 awarded to the BCBL through the
“Severo Ochoa Program for Centers/Units of Excellence in R&D”). This research is also supported by the Basque
Government through the BERC 2018-2021
