Children learning English as a second language acquire much vocabulary from recreational reading (RR) as do their English native-speaking peers. Such learning typically involves a cycle of repeated encounters with the same novel word in different contextual settings, each encounter serving to consolidate and build upon prior knowledge (Nation, 1990). This dissertation examines one factor that potentially impacts upon the pedagogical value of RR as a vocabulary-building practice: the time intervals between the reader‘s encounters with the same novel word while engaged in in-class RR sessions. The study employs five sets of texts, each designed to expose the reader to a uniquely more, or less, distributed encounter with a small sample of non-words particular to the set in which they occur.
Employing a researcher-designed data-elicitation instrument (the Vocabulary State Assignment Task (VSAT)), the study demonstrates that among a population of Thai primary school English as a second language (ESL) children, distributed encounters with novel non-words potentially lead to more impressive meaning gains of those same non-words than do massed encounters (i.e., many encounters with the same word over a relatively short time period). Drawing upon three alternative (reasonable) notions of word knowing, the investigation demonstrates that each is associated with different learning outcomes in terms of (a) whether total word gains from reading any one set of texts differed significantly from those associated with reading another and (b) how substantial were gains attributable to more or less distributed word presentations.
A breakdown of target word gains by syntactic class (nouns, verbs, adjectives, and adverbs) revealed an association between how distributed were occurrences of the same novel word and statistically significant differences in the proportions of learned words of the class of interest. The study concludes that spaced learning impacts more upon gains of nouns and verbs than it does adjectives and adverbs. Whether differences in noun and/or verb totals proved significantly different depended upon the definition of known word one acknowledges
