WorksheetsThe Importance of Variables in Research & Studies
Total questions: 18
Worksheet time: 9mins
What is the dependent variable (DV) in the research question: 'Does exercise improve mental health?'
mental health
exercise frequency
diet
sleep quality
In the example provided, what are the independent and dependent variables when examining test scores of students who study at night vs. in the morning?
Independent variable: time of study (night vs. morning)
Dependent variable: test scores
Independent variable: test scores
Dependent variable: time of study (night vs. morning)
What is the independent variable in the example of causation related to exercising and weight loss?
The independent variable is exercising.
The independent variable is weight loss.
The independent variable is diet.
The independent variable is sleep.
Exercising regularly is considered a causation for weight loss because:
it increases metabolism and burns calories.
it decreases metabolism and stores calories.
it has no effect on metabolism or calories.
it only builds muscle without affecting weight.
Which of the following is an example of a discrete variable?
Height of students in a classroom
Temperature
Number of students in a class
Weight of an individual
An independent variable is the variable that the researcher _______ to observe its effect.
manipulates
observes
controls
measures
Fill in the blank: Continuous variables allow for _______ measurements and are often analyzed using statistical methods like mean, standard deviation, or regression.
precise
approximate
random
discrete
Which of the following is an example of a dependent variable?
Type of diet in a weight-loss study
Plant growth based on sunlight exposure
Same soil type in a plant growth experiment
People who drink more coffee perform better at work
In a study showing that people who drink more coffee perform better at work, what is the confounding variable?
The amount of sleep the participants get
The type of coffee consumed
The age of the participants
The time of day the coffee is consumed
What is a confounding variable?
A variable that influences both the dependent variable and independent variable, causing a spurious association
A variable that is always constant in an experiment
A variable that only affects the independent variable
A variable that only affects the dependent variable
What is an intervening variable?
A variable that is manipulated to observe its effect on the dependent variable
A variable that is measured to see the effect of the independent variable
A variable that is not directly observable but is inferred from the relationship between independent and dependent variables
A variable that remains constant throughout the experiment
What is an extraneous variable?
A variable that is not of interest to the researcher but may affect the results.
A variable that is intentionally manipulated by the researcher.
A variable that is the main focus of the study.
A variable that is always constant in an experiment.
Guiding Questions: Which of the following are organismic variables that could influence reaction time?
Age, gender, and fatigue
Weather conditions and time of day
Type of food consumed
Clothing and footwear
Researchers can account for variables to ensure accurate results by:
Using control groups
Ignoring outliers
Increasing sample size
Randomizing samples
An intervening variable that might explain why protein affects weight loss is:
metabolism
exercise
hydration
sleep
In the research question 'Does sleep quality affect academic performance?', what is the independent variable (IV)?
study habits
age of students
sleep quality
academic performance
Which of the following is an example of a continuous variable?
Temperature in a classroom
Type of study method used
Number of students in a class
Number of hours studied
What is the role of a control group in an experiment?
To provide a baseline for comparison
To manipulate the independent variable
To measure the dependent variable
To introduce extraneous variables
