Extraneous variables may have an influence on the dependent variable. In what ways do researchers attempt to control extraneous variables? Support your answer with current literature.

Instruction: Not less than 250 words, in text citation, zero plagiarism.

Text book: 

1. Understanding Nursing Research: Building an Evidence-Based Practice

Grove, S., Gray, J., & Burns, N. (2014). Understanding nursing research: Building an evidence-based practice (6th ed.). Maryland Heights, MO: Elsevier. ISBN-13: 9781455770601