Predicting the difficulty of EFL reading comprehension tests based on linguistic indices

Table 3 Regression analysis for predicting variables of EFL reading difficulty

Variables	β	R	t	p	R	R²	ΔF	Sig.
	–	–	22.472	0.000	0.267	0.071	0.873	0.505
Narrativity	− 0.013	− 0.036	− 0.101	0.920
Syntactic simplicity	− 0.159	− 0.110	− 1.102	0.275
Word concreteness	0.085	0.074	0.654	0.516
Referential cohesion	− 0.240	− 0.190	− 1.789	0.079
Deep cohesion	− 0.028	− 0.049	− 0.199	0.843