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  • "factor" command in Stata 18.0

    Hello,
    May I have a couple of questions related to the command "factor" in the Stata 18.0 software.
    Q1. Does the Stata automatically reverse the negative sentences with the Likert Scale response.
    (eg. I have 4 items.
    item1: I like apples...5 points Likert scale responses (strongly disagree=1 ...strongly agree=5)
    item 2: I dislike oranges...5 points Likert scale responses (strongly disagree=1 ...strongly agree=5)
    item 3: I like coconuts points Likert scale responses (strongly disagree=1 ...strongly agree=5)
    And in this example, should I reverse code item 2 before performing factor analysis (i.e., strongly disagree=5 - strongly agree=1)?
    OR I just used as it is for item 2 (strongly disagree=1 ...strongly agree=5) and use command "factor", assuming Stata's "factor" command auto reverse the item?
    Thank you so much and I look forward to have responses on this.
    wwm

  • #2
    No, the -factor- command does not automatically reverse score anything for you. Nor is there an option available to request this. If you want reverse scoring, you have to create a new variable and use that one.

    You may, perhaps, be thinking of the -alpha- command, where Stata does reverse variables that are "backwards" by default.

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    • #3
      Thank you so much, Dr.Clyde. That is helpful.

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