Table 2.

Human word recognition rate (WRR) stratification (RQ1).

Intelligibility group	Human WRR range (%)	Human WRR (%)		Machine WRR (%)
		M	SD	M	SD
1	96 ≤ WRR ≤ 100	98.76	1.04	82.09	13.06
2	90 ≤ WRR < 96	93.66	1.58	76.79	18.91
3	80 ≤ WRR < 90	83.43	1.81	48.84	21.72
4	50 ≤ WRR < 80	63.72	7.88	23.54	12.83
5	WRR < 50	21.14	16.81	3.99	4.84

Note. Mean and SD of Human WRR and of Machine WRR for each intelligibility group, as well as the range of Human WRR used to define the intelligibility group.