Acoustic characteristics in the different phases of the menstrual cycle with results of statistical tests.

Mean and s.e.m for N = 23 women and results of the statistical analysis the effect of cycle phase on different acoustic variables.GLM with subject and vowel as random factor, and menstrual cycle phase as fixed factor; df = 4,313 for all analyses. Partial Eta2 provides an overestimate of the actual effect size; observed power gives the probability that the test statistic is greater than the critical value under the alternative hypothesis.