As the prefrontal cortex develops in middle childhood, executive function undergoes marked improvement and children make gains in

As Cecilia is getting ready for the orchestra performance in which she is about to participate, she takes time to tune her violin. She listens carefully to the pitch of each string, which is indicated by the __________ of the sound wave it produces,

to determine if she needs to make an adjustment in the instrument. a. wavelength b. frequency c. timbre d. amplitude

The ethical principle of __________ requires special interpretation when the participants are children

A) privacy B) informed consent C) beneficial treatments D) protection from harm