concreteness effect in morphosyntax acceptability judgments

The data contains acceptability ratings of Serbian sentences containing two types of clausal complements: infinitives and so-called "da+present" constructions (DPCs) combined with subjects with various degrees of concreteness (most concrete - proper names, intermediate - plural common nouns, most abstract - abstract nouns). The data was collected to test the hypothesis that more concrete subjects are rated better when combined with the more concrete type of clausal complement - DPC, and more abstract subjects are rated more favorably with the more abstract type of clausal complement - infinitive. The data also contains basic demographic information where any possibility of discovering the personal idenitities of participants is blocked.