Measuring Skill with Rasch: Dancing With The Stars Australia, 2020, (Australian Season 17)

Dancing With The Stars Aus Couple Cumulative Measures
Winsteps Table 45 Plot: Cumulative Couple measures after each Judging

 


MEASURE                                                                          Couple Mar29 - MAP - Judging
                                                                                           SKILLED|SEVERE
   110                                                                10 Claud 8  Celia 9  Claud  +
                                                                                                  |
                                                                                                  |
                                                                                                  |
                                                                                                  |
   100                                                                                           T+
                                                                                                  |
                                                                                        5  Chris  |
                                                                                                  |
                                                                      10 Celia 10 Chris 6  Celia  |
                                                                                                  |
    90                                                                                  7  Celia  +
                                                                                                  |
                                                                               5  Celia 7  Chris  |
                                                                                                  |
                                                             2  Celia 6  Chris 6  Claud 7  Ed &  S|
    80                                                                                            +
       10 Ed &  3  Chloe 3  Dami  4  Claud 4  Ed &  7  Claud 8  Chris 9  Celia 9  Chris 9  Ed &   |
                                                                                                  |
                                                                               2  Chloe 3  Claud  |
                                                                                        6  Ed &   |
                                                                                                  |
    70                                                                                            +
                                                    3  Beau  3  Chris 4  Celia 4  Chris 5  Chloe  |
                                                                                        6  Chloe  |
                                                    1  Claud 4  Chloe 5  Claud 8  Claud 8  Ed &   |
                                                                                                 M|
    60                                              2  Angie 2  Claud 3  Ed &  4  Beau  5  Dami   +
                                                                               5  Ed &  7  Dami   |T Craig Re
                                                                                                  |
                                                             1  Celia 1  Chloe 1  Chris 4  Dami   |S
                                                                                                  |
                                                                      1  Travi 2  Beau  3  Celia  |
    50                                                                                  6  Dami   +M Sharna B Tristan
                                                                               2  Chris 3  Travi  |  Mandy Mo
                                                                                                  |S
                                                                               3  Angie 4  Travi S|  Courtney
                                                                                                  |
    40                                                       1  Angie 1  Dami  1  Ed &  8  Dami   +T
                                                                                                  |
                                                                               1  Beau  2  Dean   |
                                                                                                  |
                                                                                                  |
                                                                                                  |
    30                                                                2  Dami  2  Ed &  5  Travi  +
                                                                                                  |
                                                                                        1  Dean  T|
                                                                                                  |
                                                                                        2  Travi  |
    20                                                                                            +
                                                                                         UNSKILLE|LENIENT

The Couples' dancing skills for each week are shown in the left-hand column of Wright Person-Item map: Winsteps Table 1.0 with the judges' severity in the right-hand column. "x" after Couple's name flags that this was their last performance.


-----------------------------------------------------------------------------------------------------------
|ENTRY   TOTAL  TOTAL           MODEL|   INFIT  |  OUTFIT  |PTMEASUR-AL|EXACT MATCH|                      |
|NUMBER  SCORE  COUNT  MEASURE  S.E. |MNSQ  ZSTD|MNSQ  ZSTD|CORR.  EXP.| OBS%  EXP%| Couple Mar29         |
|------------------------------------+----------+----------+-----------+-----------+----------------------|
|    73     30      3     104       6| MAXIMUM MEASURE     |  .00   .00|100.0 100.0| 8  Celia & Jarryd    |
|    86     30      3     104       6| MAXIMUM MEASURE     |  .00   .00|100.0 100.0| 9  Claudia & Aric    |
|    96     30      3     104       6| MAXIMUM MEASURE     |  .00   .00|100.0 100.0| 10 Claudia & Aric    |
|    45     29      3      98       4| .14  -.90| .13  -.63|  .99   .64|100.0  82.5| 5  Christian & Lily  |
|    53     38      4      93       3| .57  -.51| .49  -.42|  .76   .67| 75.0  72.3| 6  Celia & Jarryd    |
|    93     28      3      93       3| .60  -.49| .60  -.51|  .61   .62| 66.7  63.7| 10 Celia & Jarryd    |
|    95     28      3      93       3| .91   .08| .98   .18|  .38   .62| 66.7  63.7| 10 Christian & Lily  |
|    63     27      3      89       3| .61  -.43| .59  -.46|  .00   .62| 66.7  60.7| 7  Celia & Jarryd    |
|    43     26      3      86       3| .02 -1.93| .02 -1.93|  .99   .64|100.0  73.5| 5  Celia & Jarryd    |
|    65     26      3      86       3|2.14  1.21|2.13  1.20| -.38   .64| 33.3  73.5| 7  Christian & Lily  |
|    13     25      3      82       3| .52  -.56| .51  -.57|  .61   .61| 66.7  60.4| 2  Celia & Jarryd    |
|    69     25      3      82       3| .52  -.56| .51  -.57|  .61   .61| 66.7  60.4| 7  Ed & Jorja        |
|    55     34      4      82       3| .41  -.94| .39  -.97|  .76   .67| 75.0  62.7| 6  Christian & Lily  |
|    56     34      4      82       3| .41  -.94| .39  -.97|  .76   .67| 75.0  62.7| 6  Claudia & Aric    |
|    24     24      3      79       3| .69  -.24| .68  -.25|  .93   .61| 66.7  60.8| 3  Chloe & Gustavo   |
|    27     24      3      79       3|2.53  1.74|2.59  1.77|  .13   .61|   .0  60.8| 3  Dami & Shae       |
|    36     24      3      79       3| .61  -.38| .60  -.40|  .00   .61| 66.7  60.8| 4  Claudia & Aric    |
|    39     24      3      79       3| .61  -.38| .60  -.40|  .00   .61| 66.7  60.8| 4  Ed & Jorja        |
|    66     24      3      79       3| .61  -.38| .60  -.40|  .00   .61| 66.7  60.8| 7  Claudia & Aric    |
|    75     24      3      79       3|1.01   .26|1.04   .29|  .79   .61| 66.7  60.8| 8  Christian & Lily  |
|    83     24      3      79       3| .69  -.24| .68  -.25|  .93   .61| 66.7  60.8| 9  Celia & Jarryd    |
|    85     24      3      79       3| .61  -.38| .60  -.40|  .00   .61| 66.7  60.8| 9  Christian & Lily  |
|    89     24      3      79       3| .61  -.38| .60  -.40|  .00   .61| 66.7  60.8| 9  Ed & Jorja        |
|    99     24      3      79       3| .61  -.38| .60  -.40|  .00   .61| 66.7  60.8| 10 Ed & Jorja        |
|    14     23      3      75       3|2.13  1.20|2.12  1.20| -.38   .64| 33.3  73.5| 2  Chloe & Gustavo   |
|    26     23      3      75       3| .02 -1.91| .02 -1.91|  .99   .64|100.0  73.5| 3  Claudia & Aric    |
|    59     31      4      74       3|1.31   .62|1.32   .63|  .99   .68| 50.0  69.6| 6  Ed & Jorja        |
|    22     21      3      68       3| .69  -.24| .68  -.25|  .93   .61| 66.7  60.7| 3  Beau & Megan      |
|    25     21      3      68       3| .61  -.39| .60  -.40|  .00   .61| 66.7  60.7| 3  Christian & Lily  |
|    33     21      3      68       3| .69  -.24| .68  -.25|  .93   .61| 66.7  60.7| 4  Celia & Jarryd    |
|    35     21      3      68       3| .61  -.39| .60  -.40|  .00   .61| 66.7  60.7| 4  Christian & Lily  |
|    44     21      3      68       3| .61  -.39| .60  -.40|  .00   .61| 66.7  60.7| 5  Chloe & Gustavo   |
|    54     28      4      66       3| .90   .10| .88   .08|  .00   .69| 50.0  67.1| 6  Chloe & Gustavo  x|
|    34     20      3      65       3| .02 -1.91| .02 -1.91|  .99   .64|100.0  73.5| 4  Chloe & Gustavo   |
|    46     20      3      65       3|7.08  3.14|7.09  3.14| -.99   .64|   .0  73.5| 5  Claudia & Aric    |
|    76     20      3      65       3| .02 -1.91| .02 -1.91|  .99   .64|100.0  73.5| 8  Claudia & Aric    |
|    79     20      3      65       3| .02 -1.91| .02 -1.91|  .99   .64|100.0  73.5| 8  Ed & Jorja        |
|     6     21      3      65       3| .02 -1.89| .02 -1.90|  .00   .14|100.0  73.4| 1  Claudia & Aric    |
|    11     19      3      61       3| .52  -.56| .51  -.57|  .61   .61| 66.7  60.6| 2  Angie & Julian    |
|    16     19      3      61       3| .93   .15| .94   .16|  .99   .61| 66.7  60.6| 2  Claudia & Aric    |
|    29     19      3      61       3| .52  -.56| .51  -.57|  .61   .61| 66.7  60.6| 3  Ed & Jorja        |
|    32     19      3      61       3| .52  -.56| .51  -.57|  .61   .61| 66.7  60.6| 4  Beau & Megan     x|
|    47     19      3      61       3| .86   .03| .86   .04|  .38   .61| 66.7  60.6| 5  Dami & Shae       |
|    49     18      3      58       3| .61  -.39| .60  -.40|  .00   .61| 66.7  60.7| 5  Ed & Jorja        |
|    67     18      3      58       3|3.34  2.28|3.30  2.25|  .99   .61|   .0  60.7| 7  Dami & Shae       |
|    37     17      3      54       3| .02 -1.91| .02 -1.91|  .99   .64|100.0  73.5| 4  Dami & Shae       |
|     3     18      3      54       3| .02 -1.89| .02 -1.90|  .00   .14|100.0  73.4| 1  Celia & Jarryd    |
|     4     18      3      54       3|2.96  1.66|2.95  1.65| -.96   .14| 33.3  73.4| 1  Chloe & Gustavo   |
|     5     18      3      54       3| .02 -1.89| .02 -1.90|  .00   .14|100.0  73.4| 1  Christian & Lily  |
|    12     16      3      51       3| .86   .04| .86   .04|  .38   .61| 66.7  60.6| 2  Beau & Megan      |
|    23     16      3      51       3| .93   .15| .94   .17|  .99   .61| 66.7  60.6| 3  Celia & Jarryd    |
|    10     17      3      51       3| .52  -.56| .51  -.58|  .97   .15| 66.7  60.6| 1  Travis & Violeta  |
|    57     22      4      50       3| .72  -.23| .71  -.25|  .92   .67| 75.0  62.8| 6  Dami & Shae       |
|    15     15      3      47       3|3.34  2.28|3.30  2.25|  .99   .61|   .0  60.6| 2  Christian & Lily  |
|    30     15      3      47       3| .69  -.24| .68  -.25|  .93   .61| 66.7  60.6| 3  Travis & Violeta  |
|    21     14      3      44       3|2.94  1.64|2.93  1.64|  .89   .64| 33.3  73.5| 3  Angie & Julian   x|
|    40     14      3      44       3| .02 -1.91| .02 -1.91|  .99   .64|100.0  73.5| 4  Travis & Violeta  |
|    77     13      3      40       3| .93   .15| .94   .17|  .99   .62| 66.7  60.7| 8  Dami & Shae      x|
|     1     14      3      40       3| .52  -.56| .51  -.58|  .97   .15| 66.7  60.7| 1  Angie & Julian    |
|     7     14      3      40       3| .85   .03| .85   .03| -.29   .15| 66.7  60.7| 1  Dami & Shae       |
|     9     14      3      40       3| .85   .03| .85   .03| -.29   .15| 66.7  60.7| 1  Ed & Jorja        |
|    18     12      3      37       3|1.01   .26|1.03   .29|  .79   .61| 66.7  60.5| 2  Dean & Alex      x|
|     2     13      3      37       3|1.02   .27|1.04   .30| -.97   .15| 66.7  60.5| 1  Beau & Megan      |
|    17     10      3      30       3| .93   .15| .94   .17|  .99   .62| 66.7  60.8| 2  Dami & Shae       |
|    19     10      3      30       3| .93   .15| .94   .17|  .99   .62| 66.7  60.8| 2  Ed & Jorja        |
|    50     10      3      30       3| .93   .15| .94   .17|  .99   .62| 66.7  60.8| 5  Travis & Violeta x|
|     8     12      4      25       3|2.61  1.86|2.60  1.85|  .91   .61| 25.0  65.6| 1  Dean & Alex       |
|    20      8      3      23       3| .02 -1.92| .02 -1.92|  .99   .64|100.0  73.5| 2  Travis & Violeta  |
|------------------------------------+----------+----------+-----------+-----------+----------------------|
| MEAN    20.9    3.1      65       3| .94   -.2| .94   -.2|           | 66.0  64.8|                      |
| P.SD     6.3     .3      20       1|1.10   1.1|1.11   1.1|           | 24.2   5.9|                      |
-----------------------------------------------------------------------------------------------------------
Winsteps Table 17.1

The Dancing With The Stars Australia is a TV series on Australian TV, Network 10, tenplay.com.au. Season 17 started on Febrary 9, 2020 and ended on March 29, 2020. For details of each week, please see Wikipedia: Dancing with the Stars (Australian season 17).

The Couples are listed by name in the Excel spreadsheet available here. Each Couple's ("person") performance each week is a row in the data matrix. "1" indicates the week number. The columns (items) are labeled with the judges names such as "Craig Revel Horwood", and the "Safe" decision. Each judge's ratings are a column (item, task) in the data matrix. The judge's ratings of 1 to 10 are all modeled on the same rating scale. In the first week, 10 Couples were rated by 3 judges. The 4th judge also rated one couple's Week 1 performance.

At the end of each show after the first week, there is an elimination. A separate 0-3 item, called "Safe", decides the elimination between the two lowest Couples according to the competition rules.

This spreadsheet is then converted into the Winsteps control and data file shown below and here by means of the Winsteps Excel/RSSST menu. USCALE=10 and other control instructions have been added to rescale the measures into more friendly numbers.

The Couple measures are output from Winsteps each week using PFILE= to Excel. The column of measures is added to the Excel file here. Its plot is shown above.


&INST
Title= "DWTS2020-columns.xlsx"
; Excel file created or last modified: 3/29/2020 9:54:17 PM
; Sheet1
;     Excel Cases processed = 100
; Excel Variables processed = 12
ITEM1 = 1 ; Starting column of item responses
NI = 5 ; Number of items
NAME1 = 12 ; Starting column for person label in data record
NAMLEN = 22 ; Length of person label
XWIDE = 2 ; Matches the widest data value observed

sfunction=2
isrange=*
1 1 10
*
umean=50
uscale=3
udecim=0
TITLE = Dancing With The Stars Aus 2020 Mar29
RARE=SEVERE
FREQ=LENIENT
MORE=SKILLED
LESS=UNSKILLED
PERSON = Couple Mar29
ITEM = Judging
LINELENGTH = 120
TFILE=*
MAXPAG=60
1.0
MAXPAG=100
17.1
*

CODES = "  . 1 102 3 4 5 6 7 8 9 " ; matches the data
TOTALSCORE = Yes ; Include extreme responses in reported scores
; Person Label variables: columns in label: columns in line
@Week = 1E2 ; $C12W2
@Couple = 4E19 ; $C15W16
@Eliminated = 21E21 ; $C32W1
&END ; Item labels follow: columns in label
Craig Revel Horwood ; Item 1 : 1-2
Sharna Burgess ; Item 2 : 3-4
Tristan MacManus ; Item 3 : 5-6
Courtney Love ; Item 4 : 7-8
Mandy Moore ; Item 5 : 9-10
END NAMES
. 5 4   5  1  Angie & Julian
. 4 5   4  1  Beau & Megan
. 6 6   6  1  Celia & Jarryd
. 6 7   5  1  Chloe & Gustavo
. 6 6   6  1  Christian & Lily
. 7 7   7  1  Claudia & Aric
. 4 5   5  1  Dami & Shae
1 3 4   4  1  Dean & Alex
. 4 5   5  1  Ed & Jorja
. 6 5   6  1  Travis & Violeta
6 7 6      2  Angie & Julian
5 5 6      2  Beau & Megan
8 9 8      2  Celia & Jarryd
8 8 7      2  Chloe & Gustavo
3 6 6      2  Christian & Lily
5 7 7      2  Claudia & Aric
2 4 4      2  Dami & Shae
3 4 5      2  Dean & Alex      x
2 4 4      2  Ed & Jorja
2 3 3      2  Travis & Violeta
3 5 6      3  Angie & Julian   x
6 8 7      3  Beau & Megan
4 6 6      3  Celia & Jarryd
7 9 8      3  Chloe & Gustavo
7 7 7      3  Christian & Lily
7 8 8      3  Claudia & Aric
8 9 7      3  Dami & Shae
           3  Dean & Alex      x
6 7 6      3  Ed & Jorja
4 6 5      3  Travis & Violeta
           4  Angie & Julian   x
6 7 6      4  Beau & Megan     x
6 8 7      4  Celia & Jarryd
6 7 7      4  Chloe & Gustavo
7 7 7      4  Christian & Lily
8 8 8      4  Claudia & Aric
5 6 6      4  Dami & Shae
           4  Dean & Alex      x
8 8 8      4  Ed & Jorja
4 5 5      4  Travis & Violeta
           5  Angie & Julian   x
           5  Beau & Megan     x
8 9 9      5  Celia & Jarryd
7 7 7      5  Chloe & Gustavo
9 1010     5  Christian & Lily
8 6 6      5  Claudia & Aric
6 6 7      5  Dami & Shae
           5  Dean & Alex      x
6 6 6      5  Ed & Jorja
2 4 4      5  Travis & Violeta x
           6  Angie & Julian   x
           6  Beau & Megan     x
9 109 10   6  Celia & Jarryd
7 7 7 7    6  Chloe & Gustavo  x
8 9 8 9    6  Christian & Lily
8 9 8 9    6  Claudia & Aric
4 6 6 6    6  Dami & Shae
           6  Dean & Alex      x
6 8 8 9    6  Ed & Jorja
           6  Travis & Violeta x
           7  Angie & Julian   x
           7  Beau & Megan     x
9 9 9      7  Celia & Jarryd
           7  Chloe & Gustavo  x
9 9 8      7  Christian & Lily
8 8 8      7  Claudia & Aric
4 7 7      7  Dami & Shae
           7  Dean & Alex      x
8 9 8      7  Ed & Jorja
           7  Travis & Violeta x
           8  Angie & Julian   x
           8  Beau & Megan     x
101010     8  Celia & Jarryd
           8  Chloe & Gustavo  x
7 8 9      8  Christian & Lily
6 7 7      8  Claudia & Aric
3 5 5      8  Dami & Shae      x
           8  Dean & Alex      x
6 7 7      8  Ed & Jorja
           8  Travis & Violeta x
           9  Angie & Julian   x
           9  Beau & Megan     x
7 9 8      9  Celia & Jarryd
           9  Chloe & Gustavo  x
8 8 8      9  Christian & Lily
101010     9  Claudia & Aric
           9  Dami & Shae      x
           9  Dean & Alex      x
8 8 8      9  Ed & Jorja
           9  Travis & Violeta x
           10 Angie & Julian   x
           10 Beau & Megan     x
9 109      10 Celia & Jarryd
           10 Chloe & Gustavo  x
9 9 10     10 Christian & Lily
101010     10 Claudia & Aric
           10 Dami & Shae      x
           10 Dean & Alex      x
8 8 8      10 Ed & Jorja
           10 Travis & Violeta x


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