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Studies on Sinhala language (Indo-Aryan (SOV), spoken in Sri Lanka by the majority Sinhalese) concerning
word order have posited different arguments where some researchers concluded that Sinhala is a nonconfigurational language, while some others argue fo r its configurational structure. The arguments fo r nonconfiguraionality can be attributed to the scrambling effects (free word-order possibility) in Sinhala which
shows different ordering o f constituents without affecting grammatically. However, due to different semanticpragmatic inferences provided by differently ordered sentences, Sinhala language may possess a
configurational structure despite the surface manifestation o f the free-word-order phenomenon. Using the
nature o f scrambling effects, this experimental study examined whether sentences in the canonical word order
containing re-duplicated expressions could be processed faster than those with different word orders, and
therefore to what extent such orders form an integral part o f one’s mental grammar, the I-language. The
sample consisted o f 20 native speakers o f Sinhala and the data consisted o f 60 Sinhala sentences with such
reduplicated expressions. The presentation o f the stimulus was controlled by a computer program DMDX
(version 5.1.0.0). Both "yes” responses, and “no” responses were presented in randomly in the centre o f the
computer screen 600ms after the appearance o f a line o f asterisks •******’ at the eye fixation point on the
screen. The analysis confirmed that the reaction times were incongruent between different word orders:
Subject-Object-Verb ordered (SOV/canonical) sentences were processed faster. Therefore, this study
concluded that Sinhala sentences consisting o f reduplicated expressions possess a configurational syntactic
structure in terms o f speed ofprocessing and thus form part o f one's mental grammar whereas non-canonical
word orders are the result o f conscious syntactic transformations.
