![]() | Content Disclaimer Copyright @2020. All Rights Reserved. |
Links : Home Index (Subjects) Contact StatsToDo |
Related link :
This panel provides supports for data entry and interpretation of results only. Detailed discussions on Item Analysis for Multiple Choice Questions are provided in the Item Analysis for Multiple Choice Questions Explanation Page
Data EntryThree (3) sets of data are requiredMultiple Choice Responses is a table of test data for item analysis.
Percentile is the percentile used to identify the high and low scorers for the purpose of estimating the difficulty and discrimination ideces. The recommended value is 27% (and its correcponsing (100-27=73%) for low and high scorers. This default value should be used unless the users has reasons to change it. More discussions on this issue are provided in the Item Analysis for Multiple Choice Questions Explanation Page Default Example DataThe default example data are artificially created to demonstrate the algorithm, and does not reflect reality. It purports to be the results of a multiple choice test, using 10 questions and on 50 students (responses).
Percentile setting to identify high and low scorers is set at 27 Please note: The data was generated using random numbers so that the proportions of correct answers were set at arounf 0.5. This results in the indeces calculated to be lower than expected from a real set of multiple choice questions. Users should not be confused and think the level of difficulties and discrimination presented on this page are at the expected level. ResultsDetailed explanation of resuklts are presented in the Item Analysis for Multiple Choice Questions Explanation Page . The following are summary descriptionsTable 1 displays the number (count) and proportion (p) for each answer in each question, matching against the proportion if the answers were randomly chosen. Table 2 displays the score (n) and proportion of correct answers from each response (row), and the label as low (L) , high (H), or medium (M) scorers Table 3 displays the number (Ncorrect) ane proportion (pcorrect) of correct answers for each question, and matching these against the proportion if the question is answered in random (prandom), and the rheoretically ideal proportion (pideal) Table 4 displays the results of item analysis for each question. Detailed descriptions are presented in the Item Analysis for Multiple Choice Questions Explanation Page . ReferencesCalculations are based on that described in the web page http://www.ericae.net/ft/tamu/Espy.htm |