A many-facet flat file

Here is the data for a many-facet physical capability test. The file is in a standard "DOS text with line breaks" file called "PHYSDAT.txt":

 

01 1  9 1 1 21   3 6711 44334444444232342334 2332 23222233233

02 1 13 1 1 11   1 6711 334 4344 24444444444 4433  3344344444

10 1  6 1 1 11   1 6711 4   4444 44444444434 4444 44344444444

18 2  6 1 1 11   1 6711 44444444 44444444424 4444 44444444434

^                       ^                    ^

Col. 2             Col. 26              Col. 47

 

Each line of data file has the following description:

 

Column Facet Description

 

2-3  Rater  Number

5      Training group

 

7-8  Activity Code

10      Test-retest code

12      Videotaped

14      Environment type

15      Environment familiarity

 

17-19  Subject Number

21-22     Age

23      Sex

24      Race

 

26-45  Process Subtest of 20 items (numbered 1-20)

47-62  Motor Subtest of 16 items (numbered 21-36)

 

The keyword commands required to reformat this for Facets are in file PHYSkey.txt:

 

; File: PHYSkey.txt

; This converts a many-facet flat file to Facets format

$Input = PHYSDAT.txt

$Spoutput = PHYSFAC.txt ; Facets specifications

$Output = PHYSFDT.txt  ; Facets data

 

$Facets = 5       ;rater, activity, subject,subtest,item

 

; Output specification lines for FACETS:

$Spec = "Title = Physical Capability"

$Spec = "Positive = 3 ; subject ability"

$Spec = "Noncenter = 1 ; raters float"

$Spec = "Output = PHYSOUT.txt  ; the FACETS output file"

    $Spec = "Models = ?,?,?,?,?,R   ; the Rating (or partial credit) scale"

 

; Define the Facet labels

$Flabel = 1,Rater

$Flabel = 2,Activity

$Flabel = 3,Subject

$Flabel = 4,Subtest

$Flabel = 5,Item

 

; Define the element labels in terms of where they are in the data records:

 

; For facet 1, the label is rater number and group

$Label = 1,,$S2E3+" G"+$S5E5

 

; For facet 2, the label contains all activity-related information:

$Label = 2,,$S7E8+" T"+$S10W1+" V"+$S12W1+" E"+$S14W1+" F"+$S15W1

 

; For facet 3, the label contains all subject-related information:

$Label = 3,,$S17E19+" "+$S21E22+" S"+$S23W1+" R"+$S24W1

 

; For facet 4, identify the first subtest:

$Label = 4,,"Process"

 

;Reset the item number variable

Item = 0

; Use variable pointer, to point to position of the next rating:

Pointer = 26

; Go down the 20 items of sub-test 1.

$Do = 20

     ; Increment to the next item number

Item = Item + 1

; Facet 5 is the item number

     $Label = 5, Item

     $Rating = $S(Pointer)W1

; Increment to next position in the data record

     Pointer = Pointer + 1

$Again

 

; Now facet 4 is the second subtest

$Label  = 4,,"Motor"

 

; set variable Pointer to first rating of second subtest in data record.

Pointer = 47

 

; we want to reformat the 16 items of the second subtest

$Do = 16

     ; Increment to the next item number

Item = Item + 1

     ; Here is another way: save the rating as variable Response.

Response = $S(Pointer)W1

$Label = 5, Item, Item

     $Rating = Response

Pointer = Pointer + 1

$Again

 

The resulting Facets specification file is PHYSFAC.txt:

 

; FACFORM Version No. 1.20,  May 4, 1992

; Run on 05-04-1992 11:50:28

; from Keyword file: PHYSkey.txt

Facets = 5

Data file = PHYSFDT.txt

Title = Physical Capability

Positive = 3    ; subject ability

Noncenter = 1    ; raters float

Output = PHYSOUT.txt    ; the FACETS output file

Models = ?,?,?,?,?,R     ; the Rating (or partial credit) scale

Labels =

1,Rater

1=1 G1

2=10 G1

3=18 G2

4=2 G1

*

2,Activity

1=13 T1 V1 E1 F1

2=6 T1 V1 E1 F1

3=9 T1 V1 E2 F1

*

3,Subject

1=1 67 S1 R1

2=3 67 S1 R1

*

4,Subtest

1=Motor

2=Process

*

5,Item

1=

2=

|

35=

36=

*

 

The resulting Facets specification data file is PHYSFDT.txt:

Facform has combined observations in sequence by element number into single data records

 

1,3,2,2,1-20,4,4,3,3,4,4,4,4,4,4,4,2,3,2,3,4,2,3,3,4

1,3,2,1,21-36,2,3,3,2,,2,3,2,2,2,2,3,3,2,3,3

4,1,1,2,1-20,3,3,4,,4,3,4,4,,2,4,4,4,4,4,4,4,4,4,4

4,1,1,1,21-36,4,4,3,3,,,3,3,4,4,3,4,4,4,4,4

2,2,1,2,1-20,4,,,,4,4,4,4,,4,4,4,4,4,4,4,4,4,3,4

2,2,1,1,21-36,4,4,4,4,,4,4,3,4,4,4,4,4,4,4,4

3,2,1,2,1-20,4,4,4,4,4,4,4,4,,4,4,4,4,4,4,4,4,4,2,4

3,2,1,1,21-36,4,4,4,4,,4,4,4,4,4,4,4,4,4,3,4


Help for Facform Rasch Measurement Software: www.winsteps.com. Author: John Michael Linacre

For more information, contact info@winsteps.com or use the Contact Form
 

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