3rd: Research Methods Quiz

A study aims to investigate the effect of diet on energy levels. Participants are given one of three different diets: high protein, high carbohydrate, or balanced. Researchers then measure their energy levels over the course of a week. What is the dependent variable?

• Participants' energy levels

• Type of diet

• Length of the study

• The number of participants

A research hypothesis states that a medication will reduce symptoms of anxiety. What will the null hypothesis state?

• The medication will increase symptoms of anxiety.

• The medication will transform symptoms of anxiety.

• The medication will have no effect on symptoms of anxiety.

• The medication will have unpredictable effects on anxiety symptoms.

What is the key difference between a quasi-experiment and a true experiment?

• Quasi-experiments can only take place in realistic environments; true experiments take place in lab settings.

• In a quasi-experiment, the IV is a trait of the participants; in a true experiment, the IV is manipulated by the researcher.

• Quasi-experiments do not have any controlled variables, while true experiments do.

• Quasi-experiments allow for random assignment to either condition; true experiments cannot randomly assign participants to conditions.

Which of the following is an example of a true experiment?

• A researcher wants to investigate how age (child vs adult) affects an individual's ability to think critically.

• A researcher wants to investigate how video games affect thinking and decision-making ability.

• A researcher wants to investigate how the introduction of a new government program affects people's physical health.

• A researcher wants to investigate the relationship between nationality and helping behavior.

Use the research statement below for the questions that follow: A researcher wants to investigate the effect of daily exercise on stress levels of high school students. Identify the IV and DV.

• IV: Daily exercise, DV: Stress levels

• IV: Stress levels, DV: Daily exercise

• IV: High school students, DV: Daily exercise

• IV: Stress levels, DV: High school students

Use the research statement below for the questions that follow: A researcher wants to investigate the effect of daily exercise on stress levels of high school students. Identify the Experimental & Control Conditions.

• Experimental: Students who exercise daily; Control: Students who do not exercise

• Experimental: Students who do not exercise; Control: Students who exercise daily

• Experimental: Students who exercise weekly; Control: Students who exercise daily

• Experimental: Students who exercise monthly; Control: Students who do not exercise

Use the research statement below for the questions that follow: A researcher wants to investigate the effect of daily exercise on the stress levels of high school students. What is the Experimental (Research) Hypothesis

• Whether students exercise or not will have no significant effect on their stress levels.

• If students exercise daily, then their stress levels will decrease.

• If students exercise daily, then their stress levels will increase.

• Daily exercise will have an effect on the stress levels of high school students.

Use the research statement below for the questions that follow: A researcher wants to investigate the effect of daily exercise on the stress levels of high school students. What is the NULL hypothesis

• Whether students exercise or not will have no significant effect on their stress levels.

• If students exercise daily, then their stress levels will decrease.

• If students exercise daily, then their stress levels will increase.

• Daily exercise will have an effect on the stress levels of high school students.