Abstract:
The dynamic, durative, and telic values of a predicate determine its situation type. These values are inherent features that can be uncovered systematically using test frames. However, the applicability of tests varies across languages, making it necessary to begin by identifying which tests work well in the language under study. Several researchers have developed tests successfully for spoken languages. However, only one such investigation has been conducted in a sign language.
This study begins to address this disparity by systematically identifying situation types in Thai Sign Language (ThSL) using test frames. These test frames were first applied to a set of 30 ThSL predicates and the clauses tested over several sessions with a group of Thai Deaf. Extended testing with two new groups was then done with 12 of the predicates. The results indicate that ThSL covertly lexicalizes at least six situation types: individual-level states, stage-level states, activities, accomplishments, achievements, and semelfactives.
The study also shows that the proposed morphological markings for telicity and duration (the Event Visibility Hypothesis) in sign languages do not account for the data found in ThSL. Furthermore, it shows that the bases for these proposed morphemes are shaky. Instead, the results of the study suggest that the phonological form of a predicate reflects various subevent properties of the encoded event.
This is especially true of durative events since they involve multiple stages. For example, walk can be broken down into individual steps, each step representing a stage. The movement of the ThSL sign walk reflects these stages. In contrast to clear, cyclic stages, certain events involve gradient change. For example, melt involves a gradient transition from solid to liquid. This change is reflected in the single, gradient movement of the ThSL sign MELT. The connection between the surface form of a predicate and its internal structure supports Kuhns (2017) iconic analysis of phonological movement rather than the EVH.