Types of signals | Nbefore | Nafter | Mean differences | t | df | P |
---|
bDFM | 5.53 ± 0.56 | 4.94 ± 0.41 | 0.59 | 2.12 | 215 | 0.036 * |
wDFM | 2.93 ± 0.70 | 2.39 ± 0.53 | 0.54 | 1.64 | 120 | 0.104 |
SFM | 2.17 ± 0.66 | 2.10 ± 0.68 | 0.07 | 0.09 | 29 | 0.927 |
fDFM | 8.25 ± 1.94 | 6.22 ± 1.46 | 2.03 | 2.12 | 31 | 0.039 * |
sDFM | 2.84 ± 0.48 | 3.52 ± 0.52 | −0.68 | −2.31 | 124 | 0.023 * |
CFM-DFM | 4.32 ± 0.85 | 4.66 ± 1.02 | −0.34 | −0.42 | 52 | 0.677 |
dPFM-DFM | 8.49 ± 1.64 | 7.32 ± 1.25 | 1.17 | 1.29 | 40 | 0.204 |
- Nbefore the number of echolocation pulses before the presence of social calls, Nafter the number of echolocation pulses after the presence of social calls. Nbefore and Nafter are given as mean ± SE. Mean differences = Nbefore − Nafter. bDFM bent downward frequency modulation, sDFM steep downward frequency modulation, fDFM flattened downward frequency modulation, wDFM wrinkled downward frequency modulation, SFM sinusoidal frequency modulation, CFM-DFM chevron frequency modulation-downward frequency modulation, dPFM-DFM downward paraboloid frequency modulation-downward frequency modulation. Statistical significance is based on the paired-samples t test