Test/comparison | Figure | Areas Compared | P Value Obtained with Full Data Set | P Value with Boundary-Adjacent Units Dropped | Difference | P Value with Monkey B Dropped | Difference |
---|---|---|---|---|---|---|---|

Frequency PI for PT | 3 | ANOVA | 6.4 × 10^{−6} | 7.4 × 10^{−6} | 0.00036 | ||

A1 vs. CM | 0.048 | 0.17 | − | 0.042 | |||

A1 vs. CL | 2.4 × 10^{−6} | 2.6 × 10^{−6} | 0.00025 | ||||

CM vs. CL | 0.048 | 0.015 | 0.46 | − | |||

Frequency PI for ⅓-oct BPN | 3 | ANOVA | 0.00014 | 3.4 × 10^{−5} | 0.0044 | ||

A1 vs. CM | 0.019 | 0.047 | 0.038 | ||||

A1 vs. CL | 8.0 × 10^{−5} | 1.0 × 10^{−5} | 0.0054 | ||||

Frequency PI for 1-oct BPN | 3 | ANOVA | 0.032 | 0.011 | 0.12 | − | |

A1 vs. CL | 0.031 | 0.0072 | 0.19 | − | |||

Linear discriminator performance for PT | 3 | ANOVA | 0.00039 | 0.00063 | 0.00025 | ||

A1 vs. CL | 5.2 × 10^{−5} | 0.00014 | 5.9 × 10^{−5} | ||||

Linear discriminator performance for ⅓-oct BPN | 3 | ANOVA | 0.00052 | 0.00068 | 0.0010 | ||

A1 vs. CL | 5.3 × 10^{−5} | 6.2 × 10^{−5} | 0.00019 | ||||

CM vs. CL | 0.0095 | 0.013 | 0.023 | ||||

Linear discriminator performance for 1-oct BPN | 3 | ANOVA | 2.7 × 10^{−5} | 4.3 × 10^{−5} | 2.3 × 10^{−5} | ||

A1 vs. CL | 1.1 × 10^{−6} | 1.5 × 10^{−6} | 3.7 × 10^{−6} | ||||

CM vs. CL | 0.01 | 0.0097 | 0.04 | ||||

Number of peaks in frequency-rate curve, PT | 3 | ANOVA | 0.00083 | 0.00040 | 0.0021 | ||

A1 vs. CM | 0.0071 | 0.0081 | 0.007 | ||||

A1 vs. CL | 0.0015 | 0.00062 | 0.0071 | ||||

Number of peaks in frequency-rate curve, ⅓-oct BPN | 3 | ANOVA | 0.029 | 0.048 | 0.014 | ||

A1 vs. CM | 0.033 | 0.16 | − | 0.014 | |||

Stimulus PI for MC | 4 | ANOVA | 0.016 | 0.018 | 0.011 | ||

A1 vs. CL | 0.059 | 0.024 | + | 0.094 | |||

A1 vs. CM | 0.056 | 0.28 | 0.021 | + | |||

Stimulus PI for ES | 4 | ANOVA | 0.017 | 0.061 | − | 0.026 | |

A1 vs. CL | 0.041 | 0.1 | − | 0.05 | |||

Linear discriminator performance for MC | 4 | ANOVA | 1.2 × 10^{−5} | 1.9 × 10^{−5} | 9.2 × 10^{−6} | ||

A1 vs. CM | 0.013 | 0.014 | 0.0063 | ||||

A1 vs. CL | 1.5 × 10^{−5} | 2.8 × 10^{−5} | 1.8 × 10^{−5} | ||||

Linear discriminator performance for ES | 4 | ANOVA | 2.2 × 10^{−5} | 1.7 × 10^{−5} | 4.6 × 10^{−5} | ||

A1 vs. CL | 1.5 × 10^{−5} | 6.3 × 10^{−6} | 4.2 × 10^{−5} | ||||

CM vs. CL | 0.00098 | 0.0011 | 0.0023 | ||||

Azimuth PI, best PT | 6 | ANOVA | 0.017 | 0.0015 | 0.018 | ||

A1 vs. CL | 0.0087 | 0.00092 | 0.0087 | ||||

CM vs. CL | 0.31 | 0.017 | + | 0.4 | |||

Azimuth PI, best ⅓-oct BPN | 6 | ANOVA | 0.034 | 0.0073 | 0.066 | − | |

A1 vs. CL | 0.035 | 0.0084 | 0.13 | − | |||

CM vs. CL | 0.096 | 0.023 | + | 0.11 | |||

Azimuth PI, WN | 6 | ANOVA | 0.017 | 0.00022 | 0.017 | ||

A1 vs. CL | 0.038 | 0.0019 | 0.038 | ||||

CM vs. CL | 0.027 | 0.00027 | 0.027 | ||||

Elevation PI, best 1-oct BPN | 6 | ANOVA | 0.012 | 0.014 | 0.027 | ||

CM vs. CL | 0.0085 | 0.013 | 0.017 | ||||

Elevation PI, wide band averaged | 6 | ANOVA | 0.019 | 0.023 | 0.071 | − | |

CM vs. CL | 0.018 | 0.018 | 0.075 | − | |||

Latency | 7 | ANOVA | 5.1 × 10^{−14} | 2.4 × 10^{−13} | 2.2 × 10^{−12} | ||

A1 vs. CM | 4.1 × 10^{−13} | 7.1 × 10^{−13} | 2.6 × 10^{−12} | ||||

CM vs. CL | 1.7 × 10^{−9} | 1.5 × 10^{−8} | 1.7 × 10^{−7} | ||||

Latency-best frequency correlation | 7 | A1 | 5.4 × 10^{−6} | 5.4 × 10^{−6} | 1.8 × 10^{−5} | ||

r = −0.364 | r = −0.364 | r = −0.386 | |||||

CM | 0.44 | 0.39 | 0.58 | ||||

r = −0.076 | r = −0.091 | r = −0.061 | |||||

CL | 0.10 | 0.10 | 0.10 | ||||

r = −0.179 | r = −0.202 | r = −0.179 | |||||

Linear discriminator best window, all stimuli | 8 | ANOVA | 1.2 × 10^{−9} | 1.0 × 10^{−7} | 2.5 × 10^{−7} | ||

A1 vs. CM | 0.00089 | 0.00039 | 0.0010 | ||||

A1 vs. CL | 0.0010 | 0.021 | 0.046 | ||||

CM vs. CL | 2.2 × 10^{−9} | 2.8 × 10^{−7} | 5.6 × 10^{−7} | ||||

Correlation between acoustic structure and firing rate, ES | 9 | ANOVA | 0.019 | 0.039 | 0.053 | − | |

CL vs. CM | 0.021 | 0.04 | 0.067 | − |

Values are results of statistical tests with units adjacent to the caudomedial (CM)/caudolateral (CL) boundary dropped to test against uncertainty of the boundary location, or with units recorded from

*monkey B*dropped, compared to results obtained with the full data set. Except for latency-best frequency (BF) correlations, all*P*values are for pairwise comparisons between areas by*t*-test and corrected for multiple (3) comparisons with Šidak correction, or for ANOVA comparing all 3 areas. Analyses resulting in nonsignificant*P*value (*P*≥ 0.05) for both full data set and with units dropped are not shown (except for latency-BF correlations). Difference is coded as “+” when dropping the units changed the*P*value from nonsignificant to significant and as “−”' when it changed the*P*value from significant to nonsignificant. For latency-BF correlation,*r*values are also provided.PI: preference index; PT, pure tones; BPN, band-pass noise; MC, monkey calls; ES, environmental sounds; WN, white noise.