When, on average, does spermarche take place?

a. At the beginning of puberty
b. 13-14 years of age
c. 10-12 years of age
d. 14-16 years of age

b. 13-14 years of age

Psychology

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A child's brain reaches ______ of its adult size by about the age of 2

a. one-quarter c. three-quarters b. one half d. one third

Psychology

While there are many theories regarding the cause(s) of ADHD, some suspected causes have not held up to research scrutiny. Which of the following has not been supported conclusively as a cause of ADHD in scientific research?

A) too much sugar B) food allergies C) bad parenting D) all of the above

Psychology