Open Access
Scientific Article

Table 1

Summary of the key statsistical tests. The first column displays the experimental conditions (baseline, simultaneous and forward masking), metrics obtained (BMLD and BMLDdiff) and the statistical tests (ANOVA and key pairwise comparisons). The second column shows the main factors, and the third column shows the level of significance. See main text for abbreviations.

Baseline conditions
ANOVA Signal phase p < 0.01
Precursor p < 0.001
Signal phase × Precursor p < 0.05
Key pairwise comparisons S0/Sπ thresholds higher with NNP4/NNP8 compared to NoP p < 0.01
With a NNP4, S0 thresholds higher than Sπ
p < 0.01
Experimental condition
Simultaneous masking
ANOVA Signal phase p < 0.001
Precursor condition p < 0.001
Notch width p < 0.001
Signal phase × Notch width p < 0.01
Signal phase × Precursor condition × Notch width p < 0.05
Key pairwise comparisons Signal (S0/Sπ) thresholds with NoP greater than for NNP4 p < 0.01
Signal (S0/Sπ) thresholds with NNP4 lower than for NNP8 p < 0.01
Signal (S0/Sπ) thresholds with precursor, higher with no-notch masker compared to 400-Hz notched masker
p < 0.001
Experimental condition
Forward masking
ANOVA Signal phase p < 0.001
Precursor condition p < 0.001
Notch width p < 0.001
Signal phase × Notch width p < 0.001
Precursor condition × Notch width p < 0.001
Key pairwise comparisons Signal S0 thresholds higher than Sπ thresholds p < 0.001
Signal (S0/Sπ) thresholds with NoP lower than with NNP4/NNP8 p < 0.05
Signal (S0/Sπ) thresholds with no-notch masker higher than with 400-Hz notched masker
p < 0.001
BMLD
ANOVA Masking condition p < 0.001
Masker notch width p < 0.001
Masking condition × Precursor condition p < 0.01
Precursor condition × Notch width p < 0.01
Masking condition × Precursor condition × Notch width p < 0.05
Key pairwise Comparisons Larger with simultaneous than forward masking p < 0.001
Larger with no-notch masker than with 400-Hz notched masker p < 0.001
For all precursor conditions: Larger with no-notch masker than with 400-Hz notced masker
p < 0.01
BMLDdiff
ANOVA Precursor condition p < 0.01
Masking condition × Precursor condition p < 0.05
Key pairwise comparisons Larger with NNP4/NNP8 than without a precursor p < 0.05
Larger with N0P/NNP8 (forward masking compared to simultaneous masking) p < 0.05

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