Dr. Han is examining the impact of parental separation on student academic performance. Dr. Han defines parental separation as no contact between the child and parent for a period of 6 months or more. Academic performance is being measured using students' grade point average and end-of-year grades. Dr. Han believes that if the children have experienced parental separation that they will perform poorly in school. How Dr. Han defines parental separation is the . Please type the correct answer in the following input field, and then select the submit answer button or press the enter key when finished.