The predicate restriction in Najdi Arabic existential sentences: an empirical perspective

The predicate restriction (PR) indicates that only stage-level predicates (SLP) are permitted in the coda position of existential sentence (ES), whereas individual-level predicates (ILP) are barred. This restriction has theoretically shown to be available in the structure of the ES of Najdi Arabic (NA). This study aimed to empirically examine whether the facts reported in the theoretical literature about the effect of the PR in NA ES were reflected in the actual use of NA ES. A grammaticality judgement task in the form of a questionnaire was presented to 85 NA native speakers. The participants were asked to rate the grammaticality of the NA ESs given in the questionnaire according to their intuition. The questionnaire comprised three conditions based on the predicate type: adjectival SLP, adjectival ILP, and nominal predicates. It was expected that NA ES with adjectival SLP would yield the best ratings of the three conditions, followed by ES with adjectival ILP and ES with nominal predicates. As expected, the findings showed that the NA ES with adjectival SLP obtained the higher ratings, whereas those with adjectival ILP and nominal predicates obtained the very lowest ratings. These findings revealed that adjectival SLPs are more acceptable in the coda position of NA ES, whereas adjectival ILPs and nominal predicates are unacceptable in this position. This empirical study established a connection between the conclusions confirmed in the theoretical literature and the actual manifestations of the PR in the structure of ES.