When Jill had an emergency appendectomy, her parents stayed with Jill's children and took care of them for a week. According to research conducted by Bengtson, which of the following roles do Jill's parents serve?

There is little statistical difference between single men and single women on having a best friend

Indicate whether the statement is true or false.

What is a disadvantage of the High Amplitude Sucking paradigm to assess infant hearing?

A) It cannot be used with young infants (e.g., 1-4 months). B) It is difficult for some infants to reach the habituation threshold that is assessed by observing declines in infant sucking. C) It allows one to test subtle differences in different tones, but not differences in human speech sounds. D) Recent research has documented it is not a reliable or valid paradigm for most infants.