+ Reply to Thread
Results 1 to 2 of 2

Thread: Graduate School Help - What test do I run?

  1. #1
    Points: 5, Level: 1
    Level completed: 9%, Points required for next Level: 45

    Posts
    1
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Graduate School Help - What test do I run?




    I am working on my independent action research project and need help figuring out what statistical test to use.

    I am looking at how my students' waste management knowledge and behaviors change pre- and post- survey. Usually, when I have done something like this, I run a paired t-test since students put a student number on their survey which allows me to pair their pre-and post- test.

    However, my instructor, since I don't have a control group, wants me to divide my class. She wants me to categorize the students by their responses to the pre-survey and test whether the students that had low levels of knowledge and waste reduction behaviors prior to the unit had greater/lesser change than the students that were already highly engaged in such behaviors.

    This is how she explained my comparative question to me:
    By including both knowledge and stewardship levels, you’ve got quite a few ways to look at it – one way could include these factors:
    A – high knowledge, low stewardship
    B – high knowledge, high stewardship
    C – low knowledge, low stewardship
    D – low knowledge, high stewardship

    As for the comparative question, could it be:
    How do pre-existing levels of waste management knowledge and responsible waste stewardship affect the impact of waste management lessons and activities on the knowledge and stewardship of sixth grade students?

    ***************************************************
    So, with this information, I have absolutely no idea what kind of statistical test to use to do what my instructor is asking me to do.

    I went through and grouped my students knowledge and behaviors into high, medium, and low levels. I haven't given the post-survey yet. But what test do you run when you are grouping students into levels to compare pre- and post-? How do you know which group of students actually improved the most/least from pre to post survey?

  2. #2
    Points: 3,740, Level: 38
    Level completed: 60%, Points required for next Level: 60
    staassis's Avatar
    Location
    New York
    Posts
    233
    Thanks
    2
    Thanked 42 Times in 40 Posts

    Re: Graduate School Help - What test do I run?


    Ignoring the data is never a good idea. Data are money. You should not discretize and view the pre-test data as only 4 possible values instead of many possible values. A non-linear model linking post-test measurements to pre-test measurements would be more appropriate.

+ Reply to Thread

           




Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts






Advertise on Talk Stats