This package consists of tools for predicting relative sentence complexity. Refer  for details of the work.
See useful/testf.sh to replicate the results.
Getting incremental features.
Contact Sowmya (firstname.lastname@example.org) and checkout https://bitbucket.org/nishkalavallabhi/complexity-features for data, Psycholinguistic and other syntactic features. Contact Bharat (email@example.com) or Siva (firstname.lastname@example.org) for CCG features.
 Bharat Ram Ambati, Siva Reddy and Mark Steedman. (2016). Assessing Relative Sentence Complexity using an Incremental CCG Parser. In Proceedings of the 2016 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, San Diego, California, June.