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Thread: Likert Survey -- Stat for comparing single items and sub categories

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    Likert Survey -- Stat for comparing single items and sub categories




    Hello,

    For my dissertation I am using an existing 50 item Likert survey. I am pretty sure I will use a t-test to determine if there are differences between my two groups for the individual items.

    What I am not sure about....is the 50 items are divided into 7 subcategories....to determine if there are differences in the subcategories between my two groups (four day schools and five day schools in Missouri) would I still use a t-test?

    Thanks!

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    Re: Likert Survey -- Stat for comparing single items and sub categories


    50 item Likert survey. I am pretty sure I will use a t-test to determine if there are differences between my two groups for the individual items.
    Single Likert-type items (in contrast to a Likert scale) are considered ordinal scaled, so the t-test would inappropriate. You'd need to do U-tests.

    By the way, what is the goal of 50 (!?) comparisons between the groups? Single items are rarely of interest, and with 50 comaprisons, the risk of false-positve results must be considered.
    to determine if there are differences in the subcategories between my two groups (four day schools and five day schools in Missouri) would I still use a t-test
    If several Likert-type items are combined into a scale, the resulting scores
    are treated as interval, and group compariosn can be carried out using t-tests.

    With kind regards

    K.

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