New and on-going: Measuring the Cooks: Masterchef Australia, 2017, (Series 9)

Masterchef 2017 Cook Cumulative Measures
New in Winsteps: Table 45 Plot: Cumulative person measures after each item

 

MEASURE TASK - MAP - COOK June 11
         <HARD>|<BEST>
    4          +
               |
               |  Professional
               |
               |
               |
               |
    3          +
               |
               |
              T|
               |
               |
           XX  |T
    2      XX  +
            X  |
           XX  |
               |
               |
      XXXXXXX S|
           XX  |
    1          +
            X  |S
               |  Diana Chan     Karlie Verker
           XX  |
               |  Eloise Praino
            X  |  Sarah Tiong    *  Eliza Wils
               |
    0  XXXXXX M+  Ben Ungermann  Sam Goodwin    12 Michelle L  19 Bryan Zhu
            X  |  Tamara Graffe
        XXXXX  |  Callan Smith   Nicole Steven
            X  |M 13 Ray Silva
           XX  |  Arum Nixon     21 Pia Gava
           XX  |  14 Samuel Whi  17 Trent Devi
            X  |  16 Jessica Bu
   -1          +  15 Pete Morga
            X  |
          XXX S|
          XXX  |
            X  |  18 Benjamin B
               |S
           XX  |
   -2          +  20 Benita Orw  22 Josh Clear
               |
            X  |
               |  23 Lee Behan
              T|
            X  |
            X  |
   -3          +T 24 Rashedul H
         <EASY>|<WORST>

The cooks' abilities are shown in the Wright Person-Item map: Winsteps Table 16.3. We are surprised that relatively high performer 19 Bryan Zhu was eliminated so early. Eloise Praino is the only cook to have bested a Professional Chef. Karlie Verkerk has won the Power Pin. Tamara Graffen was eliminated, but immediately reinstated in the Second Chance episode.


----------------------------------------------------------------------------------------------------------
|ENTRY   TOTAL  TOTAL          |% chance| MODEL|   INFIT  |  OUTFIT  |EXACT MATCH|                       |
|NUMBER  SCORE  COUNT  MEASURE | winning| S.E. |MNSQ  ZSTD|MNSQ  ZSTD| OBS%  EXP%| COOK June 22          |
|------------------------------+--------+------+----------+----------+-----------+-----------------------|
|    25      8      7    3.72  |        |  1.07| .96    .2| .92    .1| 85.7  85.3|    Professional Chef  |
|    12     51     30     .77  |    16  |   .31|1.33   1.3|1.10    .4| 43.3  58.9|    Karlie Verkerk     |
|     7     45     26     .77  |    16  |   .33| .67  -1.4| .97    .0| 65.4  58.6|    Diana Chan         |
|     9     53     29     .43  |    11  |   .31|1.44   1.5|1.37   1.2| 58.6  62.1|    Eloise Praino      |
|     8     49     26     .35  |    10  |   .32| .58  -1.7|1.23    .8| 76.9  60.8| *  Eliza Wilson       |
|    22     51     27     .27  |    10  |   .34| .80   -.7|1.59   1.7| 63.0  66.5|    Sarah Tiong        |
|     2     56     29     .05  |     8  |   .30| .84   -.5| .67  -1.1| 69.0  61.4|    Ben Ungermann      |
|     5     23     12     .01  |        |   .50| .90   -.1|1.12    .4| 58.3  66.8| 19 Bryan Zhu          |
|    14     56     29    -.03  |        |   .32| .66  -1.2| .62  -1.3| 65.5  64.2| 12 Michelle Lukman    |
|    20     59     31    -.03  |     7  |   .32|1.52   1.7|1.31   1.1| 61.3  66.2|    Sam Goodwin        |
|    23     66     34    -.15  |     6  |   .29| .85   -.5| .80   -.7| 64.7  63.9|    Tamara Graffen (13)|
|    15     58     29    -.24  |     6  |   .32| .93   -.1| .67  -1.1| 69.0  64.5|    Nicole Stevenson   |
|     6     56     27    -.25  |     6  |   .33| .80   -.6| .68  -1.0| 70.4  64.4|    Callan Smith       |
|    19     52     26    -.43  |        |   .37|1.68   2.0|1.82   2.1| 53.8  66.2| 13 Ray Silva          |<- most inconsistent
|     1     63     30    -.61  |     4  |   .33|1.01    .1|1.44   1.3| 73.3  67.0|    Arum Nixon         |
|    17     20     10    -.62  |        |   .58|1.33    .8|1.30    .7| 60.0  70.6| 21 Pia Gava           |
|    24     34     16    -.76  |        |   .46|1.20    .6|1.12    .4| 50.0  68.6| 17 Trent Devincenzo   |
|    21     52     24    -.77  |        |   .34| .90   -.3| .96    .0| 62.5  62.8| 14 Samuel Whitehead   |
|    10     42     19    -.93  |        |   .39| .82   -.4| .77   -.4| 73.7  63.9| 16 Jessica Butler     |
|    16     49     22   -1.01  |        |   .38| .83   -.4|1.07    .3| 59.1  66.5| 15 Pete Morgan        |
|     4     34     15   -1.50  |        |   .46|1.00    .1| .72   -.4| 73.3  64.3| 18 Benjamin Bullock   |
|     3     26     11   -2.05  |        |   .58| .79   -.3| .96    .2| 63.6  64.6| 20 Benita Orwell      |
|    11     17      7   -2.06  |        |   .69| .67   -.5| .48   -.4| 71.4  63.6| 22 Josh Clearihan     |<- most consistent
|    13     18      7   -2.44  |        |   .64| .88   -.1| .99    .3| 42.9  58.6| 23 Lee Behan          |
|    18     11      4   -3.05  |        |   .79|1.21    .5| .87    .2| 50.0  54.9| 24 Rashedul Hasan     |
|------------------------------+--------+------+----------+----------+-----------+-----------------------|
| MEAN    42.0   21.1    -.42  |        |   .44| .99    .0|1.02    .2| 63.4  64.6|                       |
| P.SD    17.1    9.1    1.28  |        |   .19| .28    .9| .32    .9| 10.1   5.4|                       |
----------------------------------------------------------------------------------------------------------

Masterchef Australia is a TV series on Australian TV, Network 10, tenplay.com.au. Series 9 started on May 1st, 2017, and the final episode is scheduled for July, 2017.

Each episode, or part of an episode, is a column (item, task) in the data matrix. The first three episodes are for qualification and are summarized in the "Q" column, the first column (item, task) in the data matrix. In the first episode, 19 home-cooks cooked dishes good enough for immediate qualification, scored "1" here. In the second episode 3 more are added, scored "2". In the third episode 1 more, scored "3", making 24 contesting cooks in total. Each cook is a row in the data matrix.

In most subsequent episodes, the winner or winning group of cooks are scored "1", the losers are scored "3", and the middle group are scored "2". Since the scoring varies across episodes, the Partial Credit Model, ISGROUPS=0, is used. For details of each episode, please see Wikipedia: MasterChef Australia (series 9).

At the end of "Elimination" episodes, the losing cook is eliminated from the competition. In "Immunity" episodes, the winning cook competes against a professional chef. If the cook wins, the cook is awarded an "Immunity" pin, which can be used to escape from a future "Elimination" episode. The professional chefs differ for each episode, but are conceptualized to have the same ability and so are identified as a 25th contestant in the data matrix.

The cooks are listed by name. The number immediately preceding some names is their order of elimination, counting backwards. Rashedul Hasan was the first cook eliminated and so is numbered 24. The overall winner will be numbered 1. * indicates that the cook has never been in the last stage of "Elimination".

The columns (items) are labeled with codes such as "2-MB". "2" indicates the week number. "MB" indicates the type of competition. They are Q=Qualification, MB=Mystery Box, E=Elimination based on individual performance, S=Invention Test, cooking for oneSelf, I=Immunity challenge, C=cook-off against a professional chef, T=Team cooking, TE=Elimination based on Team performance, 2C=Second Chance. In the data, "." indicates that the cook is eliminated. "i" indicates the cook used an Immunity pin to bypass an Elimination competition. "B" indicates the cook is given a Bye for this event.

After each episode, the cooks' performances are scored based on the judges opinions and entered into an Excel spreadsheet, available here. This is then converted into the Winsteps control and data file shown below and here by means of the Winsteps Excel/RSSST menu. USCALE=-1 has been added to reverse the measures, because lower score indicates higher ability.


&INST
Title= "Masterchef.xls"
; Excel file created or last modified: 6/22/2017 8:47:36 PM
; Sheet1
;     Excel Cases processed = 25
; Excel Variables processed = 53
ITEM1 = 1 ; Starting column of item responses
NI = 51 ; Number of items
NAME1 = 53 ; Starting column for person label in data record
NAMLEN = 23 ; Length of person label
XWIDE = 1 ; Matches the widest data value observed

; extra control variables
ISGROUPS = 0 ; Partial Credit model: in case items have different rating scales
USCALE = -1 ; low score = high ability
FREQ = HARD ; for the Wright Person-Item Map
LESS = MORE
MORE = LESS
RARE = EASY
PERSON = COOK June 22
ITEM = TASK
TFILE=*
1.3
17.1
*

CODES = "1234. iB" ; matches the data
TOTALSCORE = Yes ; Include extreme responses in reported scores
; Person Label variables: columns in label: columns in line
@x-order = 1E2 ; $C53W2
@Cook = 4E22 ; $C56W19
&END ; Item labels follow: columns in label
1-Q ; Item 1 : 1-1
1-MB ; Item 2 : 2-2
1-E ; Item 3 : 3-3
2-MB ; Item 4 : 4-4
2-S ; Item 5 : 5-5
2-E ; Item 6 : 6-6
2-I ; Item 7 : 7-7
2-C ; Item 8 : 8-8
2-T ; Item 9 : 9-9
2-TE ; Item 10 : 10-10
3-MB ; Item 11 : 11-11
3-S ; Item 12 : 12-12
3-E ; Item 13 : 13-13
3-I ; Item 14 : 14-14
3-C ; Item 15 : 15-15
3-T ; Item 16 : 16-16
3-TE ; Item 17 : 17-17
4-MB ; Item 18 : 18-18
4-S ; Item 19 : 19-19
4-E ; Item 20 : 20-20
4-C ; Item 21 : 21-21
4-C ; Item 22 : 22-22
4-C ; Item 23 : 23-23
4-T ; Item 24 : 24-24
4-TE ; Item 25 : 25-25
5-MB ; Item 26 : 26-26
5-S ; Item 27 : 27-27
5-E ; Item 28 : 28-28
5-I ; Item 29 : 29-29
5-C ; Item 30 : 30-30
5-T ; Item 31 : 31-31
5-TE ; Item 32 : 32-32
6-MB ; Item 33 : 33-33
6-S ; Item 34 : 34-34
6-E ; Item 35 : 35-35
6-I ; Item 36 : 36-36
6-C ; Item 37 : 37-37
6-T ; Item 38 : 38-38
6-TE ; Item 39 : 39-39
7-MB ; Item 40 : 40-40
7-S ; Item 41 : 41-41
7-E ; Item 42 : 42-42
7-2C ; Item 43 : 43-43
7-T ; Item 44 : 44-44
7-TE ; Item 45 : 45-45
8-MB ; Item 46 : 46-46
8-S ; Item 47 : 47-47
8-T ; Item 48 : 48-48
8-T2 ; Item 49 : 49-49
8-S2 ; Item 50 : 50-50
8-E ; Item 51 : 51-51
END NAMES
32.32   2132   3122    1 32   2 32   22341 2121312     Arum Nixon
12.32   1 32   3132    1 31 2 3122   1 33  2121311     Ben Ungermann
13232   1 32   32.........................4........ 20 Benita Orwell
13132   2232   1 32    23.................4........ 18 Benjamin Bullock
11.32   1 32   1 232   ...................2........ 19 Bryan Zhu
11.32   1 32   1 31 2  2132   3332   1 33  1 214. 2    Callan Smith
12.22   1 32   1 31  2 1 22   1 31 2 2122  1 12.. 2    Diana Chan
22.31 2 1 32   1 22    1 32   1 22   1 33  1 21213  *  Eliza Wilson
12.12   2131 111 12    2i32   2 331  1 33  B 212141    Eloise Praino
12.32   2222   2 32    21331  34..........2.......  16 Jessica Butler
12.32   23................................4.......  22 Josh Clearihan
12.31 2 1 32   2 32    1 12   3211 122131  1 1112 2    Karlie Verkerk
231333....................................3.......  23 Lee Behan
12.22   2232   2 32    2122   3122   1 32  212122 2 12 Michelle Lukman
12.32   2122   3132    2132   3132   1 33  1 2112 3    Nicole Stevenson
12.331  1 331  3122    1 32   33332.......3.......  15 Pete Morgan
11.22   21322  ...........................4.......  21 Pia Gava
133.......................................4.......  24 Rashedul Hasan
12.332  1 131  1 32    2232   1 331  1 241 22.....  13 Ray Silva
11.32   2131 2 1 31   21 331  1 32   21141 21214. 3    Sam Goodwin
12.32   2133   1 331   2121 3 3232   23...3.......  14 Samuel Whitehead
22.21 121 31 2 2 32    1 32   2 22   2133  1 12.. 2    Sarah Tiong
12.32   2122   2 32    2221 122 31 2 223421212122 2    Tamara Graffen (13)
12.32   1 22   1 331   1 332..............4.......  17 Trent Devincenzo
       1      2     111      1      1                  Professional Chef


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New and on-going: Masterchef Australia 2017: Rasch Measurement of Cooks with Table 45

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New and on-going: Masterchef Australia 2017: Rasch Measurement of Cooks

 

 
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