Periodicity sieves estimate which vowel dominates a unit’s firing in mixtures.

Evidence

We applied a “periodicity-sieve” analysis to the correlograms to estimate the dominant period(s) in the inter-spike-interval statistics (e.g., Larsen et al. 2008 ); yielding template-contrast functions . To assess the statistical significance of peaks in the template-contrast function we used a bootstrap technique (permutation analysis; 1000 replications: p < 0.01 considered significant). Based on the template-contrast functions in response to double vowels, we computed the “periodicity-tagged” firing rate for each vowel of the mixture (similar to that proposed by Keilson et al. 1997 ); e.g., for the /a/ component: Where is the mean firing rate of that single unit to the double vowel /a, i/, and and are template-contrast values for the two double-vowel components, respectively. — Dijk, Pim van, Physiology, Psychoacoustics and…, 5037

Categorization

• DEFINE: Defines periodicity-sieve analysis, template-contrast functions, and periodicity-tagged firing rate, the core analysis methods of this chapter.