Here's some interesting stats I took from a college test on music and perception:
"Children are typically unable to discriminate atonal from tonal melodies until what age?
About the age of 7 or 8.
At about what age is continued musical development entirely attributable to environmental factors such as musical instruction or training, or through general exposure to music?
About the age of 10.
Identify four features of lullabies that make them especially suited to infants. (Hint: compare with infant-directed soothing speech.)
(1) slow, (2) average pitch is higher, (3) few changes of pitch direction, (4) greater proportion of descending pitch intervals.
At what age do children typically show less spontaneous body movement in response to music?
About the age of 5.
At what age do children typically show substantial rhythmic coordination?
About the age of 10.
Indicate the relative order of the child's development for each of the following musical/auditory attributes: rhythm, tonality, localization, pitch, style.
Order of development: (1) localization, (2) pitch, (3) tonality, (4) rhythm, (5) style.
Adolescence is an important time in the forming of musical tastes. What might account for the musical importance of adolescence?
Socially, adolescence is an important time to build peer-support relations to supplement family-support relations. Adolescence is characterized by a strong need to belong, or identify with a peer group. Group identity is established, in part, by clothing, manners, speech patterns, food and music preferences. Oxytocin levels are generally high during adolescence, and so bonding is facilitated.
At what age does a child normally exhibit secondary emotions?
Commonly between 3 and 4 years of age.
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It's up to you if you believe this stuff.