Praxis II (5019) - # of correct answers

Discussion in 'Multiple Subject Tests' started by minibear7, Jul 11, 2019 at 6:35 PM.

  1. minibear7

    minibear7 Rookie

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    Jul 11, 2019 at 6:35 PM

    I will be taking the Praxis II soon. Passing score in my state is 155. The exam has 120 questions, excluding 4 response questions. How many questions will I need to get correct on the 120-question exam n order to pass?
     
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  3. TeacherGroupie

    TeacherGroupie Moderator

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    Jul 12, 2019 at 5:02 PM

    That's a question with a wide range of possible answers.

    Praxis's scoring scale doesn't run from 0 to 200, it runs from 100 to 200. In other words, there are 100 scaled points on the table, and for 5019 in your state you need 55 of them. Inferring from this that you need 55% of questions correct, however, would be a mistake: scaling the scores, rather than simply reporting raw scores, is intended to produce scores for a test that can legitimately be compared over time and across test versions. (If you ever write quizzes or exams, you'll discover quickly how darned hard it is to write questions that are exactly equivalent in difficulty. The scaling process includes what we could call "fudge factors" to even things out.) The difference per question isn't large as such, but it does mean that the number of questions required to get 55 scaled points can vary.

    A further complication is that not all of the 120 multiple-choice questions may be counted: up to 20% may be "non-scoring" questions, or questions that are being field-tested: the results from each such question are analyzed to ensure that it doesn't have unexpected ambiguities or more than one defensible answer or something of the like. If you think of your raw multiple choice results as a ratio, correct "non-scoring" questions are subtracted from the numerator, and that makes people unhappy - but ALL "non-scoring" questions are subtracted from the denominator, and most test takers come out better that way. Up to 20% of questions in a given test or subtest can be "non-scoring"; in this case, and because Praxis seems to like round numbers, chances are that 20 of 5019's 120 multiple-choice questions are not counted.

    The constructed response questions introduce a related but different complication, but that explanation can wait.

    With all of that said, most teacher tests can be passed with about 2/3 of available points.
     
  4. minibear7

    minibear7 Rookie

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    Jul 12, 2019 at 6:42 PM

    Thank you for all of that information, it was very useful. I took the test today and received no unofficial score. Do you know what this means?
     
  5. TeacherGroupie

    TeacherGroupie Moderator

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    Jul 12, 2019 at 11:15 PM

    In this case, it's likeliest to mean that those four constructed responses have yet to be scored. Another possibility is that the version of the test that you took today is new enough that the Praxis boffins are still figuring out how to map raw scores onto scaled scores.
     
  6. futuremathsprof

    futuremathsprof Aficionado

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    Jul 12, 2019 at 11:56 PM

    I’ve always wondered, TeacherGroupie, if it is possible to get a perfect raw score and still receive less than a perfect score once it is scaled. Have you ever encountered a situation like that?
     
  7. TeacherGroupie

    TeacherGroupie Moderator

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    Jul 13, 2019 at 12:03 PM

    I would expect so, yes.
     
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