Jasmine Is a Health Psychologist Who Is Interested in Experimentally

Multiple Choice

Jasmine is a health psychologist who is interested in experimentally investigating whether massages increase psychological well-being. In her study, participants are assigned two one of two groups for a period of one-month. The independent variable in Jasmine's study is operationally defined as:

A) the number of massages one has had in their lifetime.
B) the number of massages one receives during the one-month study period.
C) the number of massages one has given in their lifetime.
D) the number of massages one gives during the one-month study period.