Below you will find a link for an article from that looks as cell

Below you will find a link for an article from that looks as cell phone usage and gpa. For this first assignment you will need to:
1) Determine the purpose of the article (4 points)
    The purpose of the article is the “why” behind the research. Why was this research conducted? What was the researcher trying to determine? You should be able to answer this question in one sentence.
2) Identify the independent variable (3 points)
    Remember that the independent variable is the variable that is manipulated by the researcher. 
3) Identify the dependent variable (3 points)
    This is the variable that is ultimately measured to see if there was an effect caused by the independent variable.
Article: https://journals.sagepub.com/doi/full/10.1177/2158244015573169