New: 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 July 24
             HARD|MORE
    2            +
                T|
                 |
                 |
                 |T 99 Professional Ch
                 |
           XXXX  |
        XXXXXXX  |
    1       XXX S+
           XXXX  |
          XXXXX  |
             XX  |  1 Diana Chan
          XXXXX  |S 3 Karlie Verkerk
      XXXXXXXXX  |
             XX  |  2 Ben Ungermann     6 Sarah Tiong       7 Eliza Wilson
          XXXXX  |  4 Tamara Graffen (  8 Eloise Praino
    0       XXX M+  19 Bryan Zhu
          XXXXX  |  12 Michelle Lukman
           XXXX  |  5 Arum Nixon
           XXXX  |  10 Sam Goodwin
              X  |  11 Nicole Stevenso  13 Ray Silva
             XX  |M 21 Pia Gava
             XX  |  9 Callan Smith
              X  |  14 Samuel Whitehea  17 Trent Devincenz
   -1           S+  16 Jessica Butler
              X  |  15 Pete Morgan
            XXX  |
             XX  |
             XX  |  18 Benjamin Bulloc
              X  |S
              X  |
              X T|
   -2            +
                 |  20 Benita Orwell    22 Josh Clearihan
              X  |
                 |
                 |  23 Lee Behan
                 |T
              X  |
              X  |
   -3            +
                 |  24 Rashedul Hasan
                 |
                 |
                 |
                 |
                 |
                 |
   -4            +
             EASY|LESS

The cooks' abilities are shown in the Wright Person-Item map: Winsteps Table 1.3. Diana Chan is the overall winner. We are surprised that relatively high performer 19 Bryan Zhu was eliminated so early. Karlie won a Power Pin. Sarah and Eloise won Immunity pins and used them (i in the data). Tamara was eliminated, but immediately reinstated in the Second Chance episode.


------------------------------------------------------------------------------------------------
|ENTRY   TOTAL  TOTAL           MODEL|   INFIT  |  OUTFIT  |EXACT MATCH|                       |
|NUMBER  SCORE  COUNT  MEASURE  S.E. |MNSQ  ZSTD|MNSQ  ZSTD| OBS%  EXP%| COOK July 24          |
|------------------------------------+----------+----------+-----------+-----------------------|
|    25     13     10    1.52     .70|1.20    .8|1.49   1.4| 70.0  69.7| 99 Professional Chef  |
|     7     90     49     .59     .20| .85   -.9| .94   -.2| 46.9  47.7|  1 Diana Chan         |
|    12     92     50     .56     .20| .90   -.5| .88   -.6| 50.0  49.4|  3 Karlie Verkerk     |
|     8     78     39     .31     .23| .61  -2.2|1.07    .4| 69.2  54.0|  7 Eliza Wilson       |
|     2     96     49     .29     .20|1.00    .1| .88   -.5| 61.2  52.0|  2 Ben Ungermann      |
|    22     90     44     .20     .22| .92   -.3|1.34   1.6| 54.5  55.8|  6 Sarah Tiong        |
|     9     84     41     .13     .23|1.14    .7|1.16    .8| 56.1  59.1|  8 Eloise Praino      |
|    23    104     52     .10     .20|1.05    .3|1.00    .1| 50.0  57.6|  4 Tamara Graffen (13)|
|     5     23     12    -.05     .50| .90   -.1|1.11    .4| 58.3  66.6| 19 Bryan Zhu          |
|    14     56     29    -.10     .32| .65  -1.3| .61  -1.4| 65.5  64.2| 12 Michelle Lukman    |
|     1     96     45    -.21     .23|1.13    .6|1.91   3.2| 66.7  60.8|  5 Arum Nixon         |
|    20     73     35    -.33     .28|1.34   1.3|1.35   1.2| 57.1  63.2| 10 Sam Goodwin        |
|    15     67     32    -.48     .31|1.00    .1| .73   -.9| 68.8  65.1| 11 Nicole Stevenson   |
|    19     52     26    -.50     .36|1.67   1.9|1.78   2.0| 53.8  66.0| 13 Ray Silva          |<- most inconsistent
|    17     20     10    -.67     .58|1.31    .7|1.28    .6| 60.0  70.6| 21 Pia Gava           |
|     6     88     37    -.73     .27| .72  -1.1| .72   -.9| 64.9  63.2|  9 Callan Smith       |
|    24     34     16    -.81     .46|1.19    .6|1.12    .4| 50.0  68.6| 17 Trent Devincenzo   |
|    21     52     24    -.82     .34| .86   -.4| .94   -.1| 66.7  62.2| 14 Samuel Whitehead   |
|    10     42     19   -1.00     .39| .85   -.3| .78   -.4| 73.7  63.9| 16 Jessica Butler     |
|    16     49     22   -1.08     .38| .84   -.4|1.07    .3| 59.1  66.4| 15 Pete Morgan        |
|     4     34     15   -1.56     .46|1.00    .1| .72   -.4| 80.0  66.6| 18 Benjamin Bullock   |
|     3     26     11   -2.09     .58| .78   -.3| .95    .2| 63.6  64.4| 20 Benita Orwell      |
|    11     17      7   -2.11     .69| .66   -.5| .48   -.4| 71.4  63.6| 22 Josh Clearihan     |<- most consistent
|    13     18      7   -2.49     .64| .89   -.1|1.00    .4| 42.9  58.6| 23 Lee Behan          |
|    18     11      4   -3.09     .78|1.20    .5| .86    .2| 50.0  54.8| 24 Rashedul Hasan     |
|------------------------------------+----------+----------+-----------+-----------------------|
| MEAN    56.2   27.4    -.58     .39| .99    .0|1.05    .3| 60.4  61.4|                       |
| P.SD    30.5   15.5    1.04     .18| .24    .8| .33   1.0|  9.1   6.1|                       |
------------------------------------------------------------------------------------------------

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 aired on July 24, 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 each name is their order of elimination, counting backwards. Rashedul Hasan was the first cook eliminated and so is numbered 24. The overall winner, Diana Chan, is numbered 1.

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: 7/24/2017 10:17:21 PM
; Sheet1
;     Excel Cases processed = 25
; Excel Variables processed = 84
ITEM1 = 1 ; Starting column of item responses
NI = 82 ; Number of items
NAME1 = 84 ; 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
TITLE = Masterchef July 24
PERSON = COOK July 24
ITEM = TASK
TFILE=*
1.3
17.1
*

CODES = "1234. Bi" ; matches the data
TOTALSCORE = Yes ; Include extreme responses in reported scores
; Person Label variables: columns in label: columns in line
@x-order = 1E2 ; $C84W2
@Cook = 4E22 ; $C87W19
&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
9-MB ; Item 52 : 52-52
9-S ; Item 53 : 53-53
9-E ; Item 54 : 54-54
9-I ; Item 55 : 55-55
9-C ; Item 56 : 56-56
9-T ; Item 57 : 57-57
9-TE ; Item 58 : 58-58
10-MB ; Item 59 : 59-59
10-S ; Item 60 : 60-60
10-S2 ; Item 61 : 61-61
10-I ; Item 62 : 62-62
10-T ; Item 63 : 63-63
10-TE ; Item 64 : 64-64
11-MB ; Item 65 : 65-65
11-S ; Item 66 : 66-66
11-E ; Item 67 : 67-67
II-I ; Item 68 : 68-68
11-C ; Item 69 : 69-69
11-S2 ; Item 70 : 70-70
11-S2E ; Item 71 : 71-71
12-MB ; Item 72 : 72-72
12-S ; Item 73 : 73-73
12-E ; Item 74 : 74-74
12-ES ; Item 75 : 75-75
12-S2 ; Item 76 : 76-76
12-E3 ; Item 77 : 77-77
12-J ; Item 78 : 78-78
13-SF ; Item 79 : 79-79
13-MB ; Item 80 : 80-80
13-NR ; Item 81 : 81-81
13-PT ; Item 82 : 82-82
END NAMES
32.32   2132   3122    1 32   2 32   22341 2121312 241  3 333 2 11 11B 31 4         5 Arum Nixon
12.32   1 32   3132    1 31 2 3122   1 33  2121311 33   2 31 32 332  1 12 31 12211  2 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. 2341  43344 33                    9 Callan Smith
12.22   1 32   1 31  2 1 22   1 31 2 2122  1 12.. 223   41132 1 331  2 33212111122  1 Diana Chan
22.31 2 1 32   1 22    1 32   1 22   1 33  1 21213 31 2 3 322 2 31 2 32             7 Eliza Wilson
12.12   2131 111 12    2i32   2 331  1 33  B 21214132 2 42234 1 233                 8 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 233   2 23121 22   4123122113     3 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 3342.......                      11 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. 333   44...                      10 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.. 232 121 32113232   4i333          6 Sarah Tiong
12.32   2122   2 32    2221 122 31 2 223421212122 213   1 333 3131 2 4121 132       4 Tamara Graffen (13)
12.32   1 22   1 331   1 332..............4..................                      17 Trent Devincenzo
       1      2     111      1      1                  1            2        2     99 Professional Chef

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