Results 1 to 4 of 4

Math Help - Pearson's correlation or not?

  1. #1
    Newbie
    Joined
    Dec 2011
    Posts
    2

    Smile Pearson's correlation or not?

    Hi, I am a student at university of Birmingham, studying medical science. As part of one of my modules i have to do bit of stats...So I Hope someone can help me out.

    Background to study
    A study was carried out to see the effects of sleep deprivation on vigilance and reaction time. The study contained two groups sleep deprived and no sleep deprived groups, both conatined male and female participants. The following was recorded gender, numbers of hours kep awke, vigilance score and reaction time.

    The question I am trying to analyse is " consider whether gender mediates relationship between hours of sleep deprived and reaction time"

    I have considerd doing following-- do a Pearsons correlation to establish if there is a relation between hours kept awake and reaction time for male and female. Then see if my null hypothesis of r=0 for male and female can be rejected.

    But I am confussed on how to show if gender mediates a relationship between the two variables.

    So Please let me know what I can do?

    Thanks in advance....
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4

    Re: Pearson's correlation or not?

    Quote Originally Posted by Ruhofaston View Post
    Hi, I am a student at university of Birmingham, studying medical science. As part of one of my modules i have to do bit of stats...So I Hope someone can help me out.

    Background to study
    A study was carried out to see the effects of sleep deprivation on vigilance and reaction time. The study contained two groups sleep deprived and no sleep deprived groups, both conatined male and female participants. The following was recorded gender, numbers of hours kep awke, vigilance score and reaction time.

    The question I am trying to analyse is " consider whether gender mediates relationship between hours of sleep deprived and reaction time"

    I have considerd doing following-- do a Pearsons correlation to establish if there is a relation between hours kept awake and reaction time for male and female. Then see if my null hypothesis of r=0 for male and female can be rejected.

    But I am confussed on how to show if gender mediates a relationship between the two variables.

    So Please let me know what I can do?

    Thanks in advance....
    First plot scatter diagrams of reaction time against hrs kept awake for both male and female subjects to eye-ball the data, then decide if a test is appropriate.

    CB
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member ILikeSerena's Avatar
    Joined
    Dec 2011
    Posts
    733
    Thanks
    121

    Re: Pearson's correlation or not?

    Sounds like you have 2 independent nominal variables (gender and sleep deprivation) and 1 dependent interval variable (reaction time).
    I believe this is typically modeled with a 2-way ANOVA.
    (Or alternatively a multiple regression with dummy variables.)

    Of course it is always wise to eyeball the data in graph form.
    See if anything weird is going on.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Dec 2011
    Posts
    2

    Re: Pearson's correlation or not?

    Thanks
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Pearson correlation coefficient
    Posted in the Statistics Forum
    Replies: 2
    Last Post: June 22nd 2011, 04:24 AM
  2. Pearson correlation - normal distribution
    Posted in the Statistics Forum
    Replies: 0
    Last Post: February 2nd 2010, 03:32 AM
  3. Pearson Correlation Coefficient
    Posted in the Advanced Statistics Forum
    Replies: 0
    Last Post: September 10th 2008, 03:09 AM
  4. Pearson's correlation - quick questions
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: August 6th 2008, 04:11 PM
  5. Pearson correlation coefficient
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: July 1st 2006, 01:27 AM

Search Tags


/mathhelpforum @mathhelpforum