the iv-dv game!!! (independent and dependent variable)

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.

IV DV

Q: Which among the following is the Independent Variable?

Amount of sleep

Age of Participant

Amount of Aggression Displayed

Type of mattress

Correct answer:

IV 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:

DVAmount 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).

IV DV

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:

IVPresence 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:

DV 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.

IV DV

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:

IVAmount 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:

DV 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.

IV DV

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:

IV 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:

DV 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:

CONSTANT

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.

IV DV

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:

IV 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:

DVNumber 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:

CONSTANTLength 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.

IV DV

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 testBrand of SUV

Correct answer:

IV 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 testBrand of SUV

Correct answer:

DVDistance 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 testBrand of SUV

Correct answer:

CONSTANT

Type of fuel used in each SUV

Amount of Gas in Car at beginning

of test

Thank You!!!