A researcher conducts a study to determine whether smiling affects students’ int

Question

A researcher conducts a study to determine whether smiling affects students’ interest in the course material. In her 8am Physiological Psychology course, she never smiles while teaching. In her 9am Physiological Psychology course, she smiles often while teaching. At the end of the semester, she gives students a questionnaire to assess the extent to which students liked the course material. The results showed that the 9am class liked the course material more than the 8am class.

1.What is the independent variable?

2. How many levels are there for the independent variable?

3. What is the dependent variable?

4. What is the confound?

5. How could the confound be fixed?

Explanation / Answer

1. The independent variable is SMILE of teachers.

2. There are total two levels for the independent variable i.e. 8am and 9am class.

3. The dependent variable is the interest of students in class.

4. Confound is extraneous variable except the dependent and independent variable . In this case , confound would be the physiological class (subject) and also the two different teachers.

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