independent variable

Experimental research is when the researcher manipulates or controls the independent variable. Experimental research normally is used when the researcher has a specific question or hypothesis (Price et al, 2017). This is done to identify a cause and effect relationship, normally conducted with an experimental group and placebo or non-manipulated group. An example of this is to determine effects of certain medications such as pain relievers. Half of the group will receive a pain pill to manage their pain symptoms while the other half will receive a placebo pill. The expected results should be that the half who received the placebo pills did not experience pain relief. 

Non-experimental research is when the research lacks manipulation or control of the independent variable (Price et al, 2017). Variables are usually measured as they naturally occur and the researcher relies on observation and interactions through case studies, surveys, or correlations. It is also used when the conditions of the experimental research is not met. An example of this is to study if there is a correlation between crime rates and poverty levels. A researcher would not manipulate or control any variables of this research but rather would observe and take data as it naturally occurs. 

Grove, & Burns. (2011). Understanding nursing research. Retrieved from https://evolve.elsevier.com/cs/product/9781455770601

Price, P. C., Jhangiani, R. S., Chiang, I. A., Leighton, D. C., & Cuttler, C. (2017, August 21). What is Non-Experimental Research. Retrieved from https://opentext.wsu.edu/carriecuttler/chapter/overview-of-non-experimental-research/