The IV-DV Game!!! (Independent and Dependent Variable)

A researcher is studying the effect of sleep on aggression, thinking that less sleep will lead to more aggression. She has some people sleep 6 hours per night, some people sleep 3 hours per night and some people sleep as much as they want. IVIVDVDV

Q: Which among the following is the Independent Variable? Amount of sleep Age of Participant Amount of Aggression Displayed Type of mattress

Correct answer: IVIV Amount of sleep

Q: Which among the following is the Dependent Variable? Amount of sleep Age of Participant Amount of Aggression Displayed Type of mattress

Correct answer: DVDV Amount of Aggression Displayed

A researcher is curious to find out what effect classical music has on people’s level of relaxation (as measured by heart rate).He lets one group listen to classical music for one hour. He lets another group sit in a quiet room for one hour (i.e. they hear no music). IVIVDVDV

Q: Which among the following is the Independent Variable? Heart Rate Amount of time spent in room Darkness level of room Presence of Classical Music in Room

Correct answer: IVIV Presence of Classical Music in Room

Q: Which among the following is the Dependent Variable? Heart Rate Amount of time spent in room Darkness level of room Presence of Classical Music in Room

Correct answer: DVDV Heart Rate

A researcher conducts an experiment to assess the effects of different amounts of alcohol on people's sense of balance. He then watches as each participant tries to walk on a straight line from one corner of the room to the next and notes how many times they stumble outside the line. A researcher conducts an experiment to assess the effects of different amounts of alcohol on people's sense of balance. He then watches as each participant tries to walk on a straight line from one corner of the room to the next and notes how many times they stumble outside the line. IVIVDVDV

Q: Which among the following is the Independent Variable? Distance person walked Weight of participants in study Number of times person stumbled Amount of Alcohol Consumed

Correct answer: IVIV Amount of alcohol consumed

Q: Which among the following is the Dependent Variable? Distance person walked Weight of participants in study Number of times person stumbled Amount of Alcohol Consumed

Correct answer: DVDV Number of Times Person Stumbled

A scientist knows that the percent of fish eggs that hatch is affected by the temperature of the water in an aquarium. She is attempting to identify which water temperature will cause the highest percentage of fish eggs to hatch. The scientist sets up 5 aquariums at the following temperatures: 10°C, 20°C, 30°C, 40°C, and 50°C. She adds 50 fish eggs to each aquarium and records the number of eggs that hatch in each aquarium. IVIVDVDV

Q: Which among the following is the Independent Variable? Number of eggs that hatch Number of fish in aquarium Size of the aquarium Aquarium Temperature

Correct answer: IVIV Aquarium Temperature

Q: Which among the following is the Dependent Variable? Number of eggs that hatch Number of fish in aquarium Size of the aquarium Aquarium Temperature

Correct answer: DVDV Number of eggs that hatch

Q: Which among the following is the Constant Variables? Number of eggs that hatch Number of fish in aquarium Size of the aquarium Aquarium Temperature

Correct answer: CONSTANTCONSTANT Number of fish in aquarium Size of the aquarium

The makers of brand A mouthwash want to prove that their mouthwash kills more bacteria than the other 4 leading brands of mouthwash. They organize 60 test subjects into 6 groups of 10 test subjects. The researchers measure the number of bacteria in each participants mouth after they use a particular brand of mouthwash. IVIVDVDV

Q: Which among the following is the Independent Variable? Length of time mouthwash is in mouth Number of participants in each group Brand of Mouthwash Number of Bacteria in mouth

Correct answer: IVIV Brand of Mouthwash

Q: Which among the following is the Dependent Variable? Length of time mouthwash is in mouth Number of participants in each group Brand of Mouthwash Number of Bacteria in mouth

Correct answer: DVDV Number of Bacteria in Mouth

Q: Which among the following is the Constant Variables? Length of time mouthwash is in mouth Number of participants in each group Brand of Mouthwash Number of Bacteria in mouth

Correct answer: CONSTANTCONSTANT Length of time mouthwash is in mouth Number of participants in each group

A car magazine is trying to write an article that rates the top 5 most fuel efficient SUVs (the SUVs that can drive the most miles for each gallon of gasoline). They make sure each model of SUV has exactly 10 gallons of gasoline in its fuel tank and reset the odometer (instrument that measures the distance a vehicle has traveled) to zero. The SUVs are then driven until they run out of gasoline. The distance on the odometer is recorded. IVIVDVDV

Q: Which among the following is the Independent Variable? Type of fuel used in each SUV Distance on odometer after driving Amount of Gas in Car at beginning of test Brand of SUV

Correct answer: IVIV Brand of SUV

Q: Which among the following is the Dependent Variable? Type of fuel used in each SUV Distance on odometer after driving Amount of Gas in Car at beginning of test Brand of SUV

Correct answer: DVDV Distance on odometer after driving

Q: Which among the following is the Constant Variables? Type of fuel used in each SUV Distance on odometer after driving Amount of Gas in Car at beginning of test Brand of SUV

Correct answer: CONSTANTCONSTANT Type of fuel used in each SUV Amount of Gas in Car at beginning of test

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