Sex stereotypes influence adults’ perception of babies’ cries

BMC Psychology

Table 1 Comparison of acoustic variables between sexes

Variable	Boys’ cries (mean ± se)	Girls’ cries (mean ± se)	F	p
%voiced	61.5 ± 2.3	65.6 ± 2.4	1.55	0.224
min F0	268 ± 11	287 ± 11	1.46	0.238
mean F0	443 ± 16	454 ± 17	0.26	0.614
max F0	663 ± 36	645 ± 38	0.11	0.747
F0CV	0.09 ± 0.02	0.08 ± 0.02	0.29	0.596
inflex25	5.7 ± 0.4	6.1 ± 0.5	0.43	0.517
inflex2	0.83 ± 0.08	1.02 ± 0.09	2.46	0.129
harm	15.6 ± 0.7	16.3 ± 0.8	0.39	0.537
jitter	0.004 ± 0.001	0.003 ± 0.001	0.06	0.802
shimmer	0.032 ± 0.007	0.028 ± 0.008	0.13	0.721
intCV	1.66 ± 0.05	1.59 ± 0.06	0.70	0.411
fsp1	1286 ± 69	1249 ± 75	0.13	0.722
fsp2	3123 ± 147	3108 ± 158	0.01	0.946
fsp3	5697 ± 258	5853 ± 278	0.17	0.683
fsp4	8377 ± 363	8688 ± 390	0.34	0.565

Univariate Linear Mixed Models testing the effect of the sex of the baby on all 15 acoustic variables. The model included baby identity as a subject variable, and baby’s age and baby’s weight as random covariates (n₁ = 15 boys, n₂ = 13 girls). Degrees of freedom: 1 (numerator), 26 (denominator)

ISSN: 2050-7283