highly significantp<0.001
The analysis generated four discriminant functions which revealed a highly significant difference between call types (Wilks' λ DF1/4 = 0.002, χ 2 = 2446.73, p<0.001; Wilks' λ DF2/4 = 0.088, χ 2 = 934.53, p<0.001; Wilks' DFλ 3/4 = 0.519, χ 2 = 252.48, p<0.001; Wilks' λ DF4 = 0.985, χ 2 = 5.93, p<0.05).