Table 16 Person maps with full person labels

Table 16.3 Person map with full labels

MEASURE ACT - MAP - KID

        <rare>|<more>

   5          +  FATALE, NATASHA        ROSSNER, LAWRENCE F.

              |

              |

              |

              |

              |  PASTER, RUTH

   4          +

              |

              |  SCHATTNER, GAIL

              |T

              |  DOEPPNER, TOM

              |

   3          +  MCLOUGHLIN, BILLY

             T|  WRIGHT, BENJAMIN

              |

           X  |  BUFF, MARGE BABY       CHAZELLE, BERNIE

              |  CLAPP, LB              SEILER, KAREN

           X  |S ERNST, RICHARD MAX     SQURREL, ROCKY J.

   2          +  CLAPP, CHARLIE         EASTWOOD, CLINT

                 VROOM, JEFF

          XX  |  BADENOV, BORIS         KENT, CLARK

           X  |  MOOSE, BULLWINKLE      ROSSNER, BESS

              |  CORLEONE, VITO         MAN, SPIDER

                 PATRIARCA, RAY

             S|  HSIEH, PAUL FRED       SQUILLY, MICHAEL

           X  |  CLAPP, DOCENT          HOGAN, KATHLEEN

                 ROSSNER, TOBY G.

   1          +M BECKER, SELWIN         BLOFELD, VILLAIN

                 FONTANILLA, HAMES      LAMBERT, MD., ROSS W.

              |  SABILE, JACK           TOZER, AMY ELIZABETH

          XX  |  ALLEN, PETER           BABBOO, BABOO

                 CORLEONE, MICHAEL      PINHEAD, ZIPPY

         XXX  |  BEISER, ED             HSIEH, DANIEL SEB

                 MALAPROP, MRS.         SANDBERG, RYNE

           X  |  CIANCI, BUDDY          EISEN, NORM L.

          XX  |  AIREHEAD, JOHN         ANGUIANO, ROB

   0         M+  AMIRAULT, ZIPPY        DRISKEL, MICHAEL

         XXX  |S

           X  |  BAUDET, GERARD

           X  |  BOND, JAMES            ROSSNER, REBECCA A.

           X  |

  -1       X  +  LIEBERMAN, DANIEL      NORDGREN, JAN SWEDE

              |

           X S|  JACKSON, SOLOMON       LANDMAN, ALAN

           X  |T

              |  SABOL, ANDREW

              |

  -2       X  +

        <freq>|<less>

Right-hand column shows the full person labels located by the person ability measures along the variable. Abbreviated person labels are shown in Table 1.3. The persons often have a normal distribution.

Left-hand column locates the item difficulty measures along the variable. Table 12 has the full item labels.

For dichotomous items, look for an even spread of items along the variable (the y-axis) with no gaps, indicating poorly defined or tested regions of the variable.  Good tests usually have the items targeted (lined up with) the persons.

For polytomous items, Table 2.2 shows the operational range of the item with its rating scale.

In Table 16.3, the full person names are shown with an item distribution. You can use NAMLMP= or PMAP=to control the number of characters of each name reported. MAXPAGE= controls the length of the Table. MRANGE= controls the displayed range of measures. PSORT= controls the sort order within rows.

Persons arranged by measure: Look for the hierarchy of person names to spell out a meaningful distribution from highest scoring at the top to lowest scoring at the bottom.

M,S,T are the Mean, 1 and 2 Standard Deviations from the Mean for the persons and items. With IPEXTREME=Yes (the default), persons and items with extreme scores are placed at the ends of the map and are excluded from M,S,T. With IPEXTREME=No, persons and items with extreme scores are placed at their measures on the map and are included in M,S,T.

Table 16.13 Person map with full labels and reversed item distribution

MEASURE TAP - MAP - KID

        <freq>||<more>

   5     XXX  ++

           X  ||

   4      XX  ++T

          XX S||  Rick    M  Susan   F

   3          ++  Frank   M

           X  ||

   2          ++S Bert    M  Betty   F  Elsie   F  Thomas  M

           X  ||

   1          ++  Britton F  Carol   F  David   M  Joe     M  Zula    F

              ||

   0         M++M

              ||  Anne    F  Audrey  F  Barbara F  Dorothy F  James   M

                  Kim     F  Linda   F  Mike    M  Ron     M  Tracie  F

                  Walter  M  William M

  -1       X  ++

              ||  Janet   F  Lisa    F  Rod     M

  -2      XX  ++S Brenda  F  Pete    M

              ||

  -3          ++  Adam    M  Richard M

           X S||  Blaise  M  Martha  F

  -4          ++T

              ||  Don     M

  -5    XXXX  ++  Helen   F

        <rare>||<less>

Right-hand column is the person details, see Table 16.3. Abbreviated person labels are shown in Table 1.13.

Left-hand column locates the item distribution by their easiness measures along the latent variable. These are  the difficulty measures reversed around the mean person difficulty "M".

On Plot:

Description:

SCORE

raw score on all active items when T1SCORE=Yes. Includes extreme items when TOTALSCORE=Yes

MEASURE

Location of person or item on the unidimensional latent variable, in logits or USCALE= units

<more>

higher person "ability" = higher raw score with complete data

<less>

lower person "ability" = lower raw score with complete data

<rare>

higher item "difficulty" = lower item "easiness" = lower score on the item with complete data: PVALUE=

<frequ>

<frequent>

lower item "difficulty" = higher item "easiness" = higher score on the item with complete data: PVALUE=

M

Mean of person or item distribution

S

One "sample is the population" standard deviation from the person or item mean

T

Two standard deviations from the person or item mean

X

one person or item

#

several persons or items, e.g., EACH "#" = 4. The value for # can be changed with T1I#= for items, T1P#= for persons.

.

between 1 and (# - 1) persons or items, e.g., if # = 4, then "." = 1 to 3

|

Variable advances. Lines without "|" have the same measure as the nearest "|" above.

||

The double line || indicates the two sides have opposite orientations: person ability and item easiness. The item difficulties are reversed.This is useful if the items and persons are being compared to the responses.