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Thread: Simple question - regression, order effects, experiment

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    Simple question - regression, order effects, experiment




    Hi there,

    I did a simple experiment whereby people in counterbalanced order received a measurement scale measuring their emotions and then received a story with a short question attached. Everything was rated on a seven point likert scale.

    So,

    Half of the people: Scale, Question
    Half of the people: Question, Scale

    The scale has three dimensions, I calculated scale scores for each factor, and now I want to test whether they predict people's answer to the question.

    I would like to use regression to predict people's answer to the question. How can I best take account of order effects? I used split file and there are slight differences. But I am not sure whether I should do something else. What are the alternatives?

    Thanks

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    Re: Simple question - regression, order effects, experiment

    Were they randomized? You can just add a variable 1 or 2, for the order of the intervention. So what variables would predict answers? Did you collect subject characteristics/demographics?


    What is your sample size?
    Stop cowardice, ban guns!

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    Re: Simple question - regression, order effects, experiment


    Yes, it was randomized. The scale factors (three) are made into composite scores and used as predictors of the question. I also collected age and gender. Sample size was 200.

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