
R.D. Carvajal Sacoto, D.D. Lira Cantos, A. M. Loor Aguayo, G. E. Loor Escobar, E.V. Luque Cantos
Facultad de Filosofía, Letras y Ciencias de la Educación. Universidad Técnica de Manabí. ECUADOR.
factors, most of the words that are uttered by children seem to coincide with
frequency of exposition. (Massaro, 2016).
Vocabulary acquisition during early age also has categorical implications that must
be considered. In the studies of Goodman, Dale, & Li (2008) hypothesized that,
regardless of semantic category, the frequency of occurrence of a word was the
dominating factor in the time and order of acquisition. They used the CHILDES
(Child Language Data Exchange System) database, which collects around 3.5
million token words from child and parent speech transcripts and the CDI
(Communicative Development Inventories) to select 567 words for the study. They
subdivided the words in 6 lexical categories: common nouns; people words; verbs;
adjectives; closed class; and miscellaneous words. They found out that nouns and
verbs were acquired the fastest, despite being the least frequent initially. On the
other hand, closed class nouns were the last to be acquired, despite being the most
frequent in speech. Nonetheless, they found that within these categories, the more
frequently a word was uttered, the faster it was learned. However, the importance of
semantic categories decreased with age, while the input frequency influence
remained stable.
In a similar study, Massaro (2016), also using the CHILDES and CDI databases,
established three ratings for words and how they are related to age of acquisition
and the role of parental input frequency. These are iconicity, or the relationship
between meaning and the symbolic form of the word; imageability, or how well can a
word be represented with a real life image; and difficulty of articulation, or how easy
it is to pronounce a word or sound in the language. It was found that words that
had a higher rating of iconicity and imageability (mostly nouns and verbs), as a well
as a lower difficulty of articulation, were learned the earliest. He also mentions that
those parameters become less relevant as the child gets older. Longobardi, Rossi-
Arnaud, Spataro, Putnick, & Bornstein (2015) mention in their studies of child
directed speech in Italian mothers during playtime, that children were more akin to
learn nouns than verbs during the first 2 years of their life. In this case, 24 mothers
were recorded during playtime sessions and the transcript of their conversations
were used as a database. The children acquired nouns that were frequently used by
their mothers and that also had a material representation that the child could
perceive, such as toys or other objects.
On the other hand, Ota & Green (2013) refer more specifically to phonological
acquisition in vocabulary. In these studies, it was found that vocabulary acquisition
at an early age was also influenced by phonological properties such as number of
phonemes and types of consonant clusters; frequency influence was less relevant at
an early age when certain phonological properties have not been mastered yet by the
child. When children get better at phonological production, then frequency starts to
play a bigger role. Therefore, it could be argued that vocabulary acquisition is also
influenced by the cognitive capacities of a child at an early age, which become less
influential as time goes by; a word that might not be very frequent in use can
nonetheless be learned earlier because it is better represented in the real word (like
nouns and verbs). Closed class words, while much more frequent, and are more