Question 1 In the following hypothesis, what is the independent variable? There is no measurable difference in incidence of acne in 15- year-olds who are placed on a chocolate-free diet. Answer s: a. Chocolate-free diet b. Acne c. Fifteen-year- olds Respons e Feedback : A dependent variable is the response behavior or outcome that the researcher wants to predict or explain. An independent variable is a stimulus or activity that is manipulated or varied by the researcher to create an effect on the dependent variable. In this example, acne is the dependent variable and removal of chocolate from the diet is the independent variable. Question 2 Which of the following could serve as a primary source of information that might be available to someone writing a biography of Jonas Salk who died in 1995? Answer s: a. A published interview with one of his lab technicians b. An article about Dr. Salk in a 1960's journal. c. A diary written by Dr. Salk. d. A previous history of his work written about him Response Feedback : The published literature contains primary and secondary sources. A primary source is written by the person who originated, or is responsible for generating, the ideas published. A research publication published by the person or people who conducted the research is a primary source. A
theoretical book or paper written by the theorist who developed the theory or conceptual content is a primary source. A secondary source summarizes or quotes content from primary sources. Thus, authors of secondary sources paraphrase the works of researchers and theorists. The problem with a secondary source is that the author has interpreted the works of someone else, and this interpretation is influenced by that author’s perception and bias. Authors have sometimes spread errors and misinterpretations by using secondary sources rather than primary sources. You should use mostly primary sources to write literature reviews. Secondary sources are used only if primary sources cannot be located or if a secondary source contains creative ideas or a unique organization of information not found in a primary source. Question 3 A stimulus or activity that is measured to examine the effect created by the independent variable best describes a(n) _____ variable. Answer s: a. Extraneou s b. Independe nt c. Dependen t d. Demograp hic Respons e Feedback : In quantitative research, the independent variable (intervention, treatment, or experimental variable) is manipulated or varied by the researcher to cause an effect on the dependent variable. The dependent variable (response or outcome variable) is measured to examine the effect created by the independent variable. An independent variable is a stimulus or activity that is manipulated or varied by
the researcher to create an effect on the dependent variable. A dependent variable is the response behavior or outcome that the researcher wants to predict or explain. Extraneous variables exist in all studies and can affect the measurement of study variables and the relationships among them.
- Fall '16
- Denise Cauble
- Nursing, Null hypothesis, researcher