Impact of Lexical Features on Answer Detection Model in Discussion Forums

Table 1

Lexical and nonlexical features.

Type	Features	Description
Lexical	Syntactic	Extracted from sentence elements and structure
	String-based	String/words base focusing on words of sentences
	Semantic	Different words with the same meaning (contextual similarity)
Nonlexical	Forum-related	Forum-specific features
	Thread-related	Features related to thread structure
	Timeliness	Time elapsed between question and reply post
	Author activeness	Shows how an author is active in the forum
	Content-based	Does the text have some specific words/strings?