#1
In an experiment investigating the effect of light intensity on plant growth, what would be the dependent variable?
The amount of water given to the plants
The type of soil used
The height of the plants
The temperature of the room
#2
Which type of variable remains constant and is not manipulated in an experiment?
Dependent variable
Control variable
Independent variable
Experimental variable
#3
Which of the following is an example of a qualitative variable?
Temperature
Weight
Color
Height
#4
Which of the following is an example of a controlled variable?
The temperature of a room
The type of fertilizer used
The amount of sunlight
The growth of plants
#5
Which of the following is NOT a type of experimental design?
Randomized controlled trial
Case-control study
Longitudinal study
Cross-sectional study
#6
Which of the following is an example of a discrete variable?
Weight
Temperature
Height
Number of siblings
#7
Which of the following is an example of an independent variable in an experiment?
Temperature
The height of a plant
The amount of water given to plants
The growth of plants
#8
What is the purpose of a control group in an experiment?
To provide a basis for comparison
To introduce bias into the experiment
To eliminate variables
To ensure accurate measurements
#9
What is the difference between an independent variable and a dependent variable?
Independent variable is manipulated, while dependent variable is observed.
Dependent variable is manipulated, while independent variable is observed.
Both independent and dependent variables are manipulated.
Both independent and dependent variables are observed.
#10
What is the purpose of randomization in an experimental design?
To ensure every participant gets the same treatment
To introduce bias into the experiment
To eliminate the need for a control group
To reduce the impact of confounding variables
#11
What is the role of a placebo in a clinical trial?
To serve as the independent variable
To serve as the dependent variable
To serve as a control for the placebo effect
To serve as a treatment for the experimental group
#12
What is the purpose of replication in an experiment?
To increase the variability of the results
To reduce the reliability of the results
To ensure the reliability of the results
To introduce bias into the experiment
#13
In a drug trial, what might be a potential confounding variable?
The dosage of the drug
The gender of the participants
The length of the trial period
The ethnicity of the participants
#14
What is the purpose of blinding in an experiment?
To ensure the researcher knows which group is the control group
To ensure the participants are unaware of which group they belong to
To make the experiment more visually appealing
To speed up the data collection process
#15
What is the purpose of a crossover study design?
To compare two different groups at the same time
To minimize the carryover effects of treatments
To ensure blinding of participants and researchers
To increase the generalizability of the results
#16
What is the purpose of counterbalancing in experimental design?
To ensure all participants receive the same treatment
To control for order effects
To introduce bias into the experiment
To eliminate the need for randomization
#17
What is the main advantage of using a matched pairs design in an experiment?
It allows for the comparison of two independent groups
It controls for individual differences more effectively
It reduces the likelihood of experimenter bias
It simplifies the data analysis process
#18
What is the purpose of a factorial design in experimental research?
To examine the interaction between two or more independent variables
To manipulate only one independent variable at a time
To eliminate the need for a control group
To ensure blinding of participants and researchers