__________ is often credited as being the father of modern psychology

Which of the following is not a risk factor for getting asthma?

a. low birth weight b. emotional stress c. living in poverty d. genetics

Yelena is researching the effect of volume on people's social interactions. She invites participants to play a card game that requires the cooperation of members of a group. There is music playing in the background

With each game, she adjusts the volume of the music. She keeps the lighting, the number of participants, and the length of the games the same. The volume of the music is the ________. a) independent variable b) experimental constant c) dependent variable d) random assignment