Table 25.2 Item statistics graphically

Controlled by USCALE=, UMEAN=, UDECIM=, LOCAL=, FITLOW=, FITHIGH=, MNSQ=

 

Specify CHART=YES to produce Tables like this.

 

With MNSQ=Yes:

 

         PUPIL FIT GRAPH:  OUTFIT ORDER             

+----------------------------------------------------------------------------------+

|ENTRY| MEASURE |  INFIT MEAN-SQUARE  | OUTFIT MEAN-SQUARE  |                      |

|NUMBR| -     + |0     0.7 1 1.3     2|0     0.7 1 1.3     2| PUPIL                |

|-----+---------+---------------------+---------------------+----------------------|

|   72|*        |       :  .  :     * |A      :  .  :      *| JACKSON, SOLOMON     |

|   47|  *      |       :  . *:       |J      :  .  :   *   | VAN DAM, ANDY        |

|   53|*        |       : *.  :       |K      :  .  :     * | SABOL, ANDREW        |

|   32|  *      |      *:  .  :       |w      *  .  :       | ROSSNER, JACK        |

|   21|  *      |  *    :  .  :       |a *    :  .  :       | EISEN, NORM L.       |

+----------------------------------------------------------------------------------+

 

The fit information is shown in graphical format to aid the eye in identifying patterns and outliers. The fit bars are positioned by FITLOW= and FITHIGH=. They may also be repositioned using TFILE=.

 

With MNSQ=No:, the ZSTD (t-standardized) statistics are reported:

 

+----------------------------------------------------------------------------+

|ENTRY | MEASURE |INFIT t standardized |OUTFIT t standardized|               |

|NUMBER| -     + |-3 -2 -1  0  1  2  3 |-3 -2 -1  0  1  2  3 | TAPS          |

|------+---------+---------------------+---------------------+---------------|

|    18|        E|    :     .     :    |    :     .     :    | 4-1-3-4-2-1-4 |

|    15|       * |    :    *.     :    |    :     *     :    | 1-3-2-4-1-3   |

|    14|      *  |    :     .  *  :    |    :     *     :    | 1-4-2-3-4-1   |

|    12|      *  |    :     .*    :    |    :     *     :    | 1-3-2-4-3     |

|    13|     *   |    :  *  .     :    |    :   * .     :    | 1-4-3-2-4     |

|    11|     *   |    :     *     :    |    :    *.     :    | 1-3-1-2-4     |

|    10|   *     |    :     *     :    |    :     *     :    | 2-4-3-1       |

|     7|  *      |    :     . *   :    |    :     .*    :    | 1-4-3-2       |

|     4| *       |    :     *     :    |    :     *     :    | 1-3-4         |

|     1|E        |    :     .     :    |    :     .     :    | Cube 1, then 4|

+----------------------------------------------------------------------------+

 

"OMIT" appears in fit-ordered Tables, where items better fitting than FITI=, or persons better fitting than FITP=, are excluded.