Dr. Coffy wants to assess whether classical music increases children's creativity. Sixty preschool children are randomly divided into two groups. Every day for two weeks, one group listens to 30 minutes of classical music and a second group listens to 30 minutes of pop music. At the end of two weeks, the two groups are given a test of creativity. This research design would best be classified as:_______.

Experimental Research Design is a scientific research design in which observations are examined under controlled conditions. It implies examining effect of independent variable on dependent variable, where independent variable is manipulated through interventional treatment & those interventions' effect on dependent variable is observed.

'Assessment whether classical music increases child's creativity' is Experimental Research Design. As : Independent Variable - classical music is provided & not provided to two groups (respectively) in controlled environment, and its impact on Dependent Variable - Creativity test ; is observed.