In virtuo exposure is used as a pre-cursor to in vivo exposure for treating phobias

A researcher who watches college students during an exam and counts how many students bite their nails is conducting a scientific observation

Indicate whether this statement is true or false.

The head can block some of the sound reaching one ear, which makes the sound more intense in one ear than the other. The brain can use this phenomenon—known as a sound shadow—to determine which of the following?

A) the frequency of the sound B) the location of the sound's source C) the loudness of the sound D) what the sound is