independent and dependent variables?

Tom and Juanita conducted an experiment to test the effect of age on difference threshold in children 5 years of age and younger. They created an experimental setup that included cards mounted with 12 pairs of paint chips of the same hue but of various shades. The difference between the first pair was fairly obvious, but the difference between each subsequent pair decreased. The last few pairs of chips seemed almost identical. The process that Tom and Juanita used was to show the pairs to a child and to note the smallest amount of difference the child could detect when asked to identify the darker chip on each card. They tested 3 children from each of these age groups: 2, 2.5, 3, 3.5, 4, 4.5, 5


What is the dependent variable?


What independent variable was tested?


What unidentified independent variables might have influenced the results?



karma to the kind person who can help me, and be positive they are correct.

 

What is the dependent variable? observation of color contrast?


What independent variable was tested? color contrast


What unidentified independent variables might have influenced the results? color blindness?

sheesh. i've been outta school a very long time.

 

If the question would have been multiple choice I would have owned it.

 

c'mon i know you hippies arent really big on learning but someones gotta know this

 

the dependent variable is the thing you are measuring/recording.

the independent variable is what causes the difference in your findings of the dependent variable.

 

What is the dependent variable? The difference threshold in detecting colours



What independent variable was tested? Age

What unidentified independent variables might have influenced the results?
Lighting, Eyesight of the Children, etc.

 

are you 100% positive ash?

 

After the edit, I am.

 

Then why the fuck are you asking US HIPPIES?

 

heres the last 4 questions, i really appreciate the help.

Ronald and his classroom research group were conducting an experiment to test peoples ability to touch their noses when thier eyes were shut. They were testing their hypothesis that males were more skilled at this task than females. The group also had a theory that noise could alter a persons ability to carry out the task. They asked several classmates and teachers to perform the task. SOmetimes, ROnald or someone else in the research group would whistle or shout while a person tried to do the task.

4. What dependent variable did Ronalds group identify?

5.What independent variable can you identify?

6. Were the variables effectively manipulated? WHy or why not?

7. How could you improve the experiment?

and last but not least....

8. Now construct your own experiment; measuring both dependent and independent variables to determine how a lack of sleep influences performance on a math quiz which emhasizes solutions to word problems.


thank you so much!

 

4. What dependent variable did Ronalds group identify?
The Ability to touch one's nose with the eyes shut


5.What independent variable can you identify?
Gender, Noise level


6. Were the variables effectively manipulated? WHy or why not?
I would say no. They confounded the independent variables.



7. How could you improve the experiment?
I would choose 20 males and 20 females at random and divide them into two groups of 10 each (4 total groups), namely:

1. Male in noisy circumstances
2. Male in quiet circumstances
3. Female in noisy circumstances
4. Female in quiet circumstances

and then record data for each group, and compare.


and last but not least....



8. Now construct your own experiment; measuring both dependent and independent variables to determine how a lack of sleep influences performance on a math quiz which emhasizes solutions to word problems.

I would take 20 people with the same level of preperation and mathematical abilities at random, assign ten to a group and ask them to pull an all-nighter and assign the other ten to another group and ask them to sleep.

Then I would compare the scores from two groups using an appropraite statistical test.