Comma-separated Value (CSV) data file
Data files prepared by BASIC programs or Spreadsheets frequently have their data values separated by commas. Each field, and each record, can be of a different length.
This is such a data file, CSVDAT.txt:
The test is of 21 items. Each examinee started at item 1, but stopped when time ran out.
The Facform keyword file, CSVkey.txt, to reformat this CSV file is:
; File: CSVkey.txt
; This converts a comma-separated value file
$Input = CSVDAT.txt
$Output = CSVFDT.txt
; if the separators are not commas, enter the separator code
; $SEP=";" ; separators are semi-colons
; for Tab separators, use $T
$Facets = 2 ; children and item
; labels for the Facets
$Flabel = 1, "Examinees"
$Flabel = 2, "Binomial Trial Items"
; and let's also output the other specifications that FACETS needs:
$Spec = "Title = Nine Binomial Trials"
$Spec = "Output = csvOUT.txt ;the FACETS output file"
$Spec = "Models = ?,?,B9,1"
; the person label
$Label = 1,,$C1 ; first comma separated value
; reset item numbering
Item = 1 ; point to first item
Datum = $C(Item+1) ; first rating in 2nd CSV field
; now go across the line until the data runs out
$Do = (Datum<>"") ; perform $Do= while ratings exist
; the ordinal number of this item
$Label = 2,Item
$Rating = Datum
Item = Item + 1 ; increment to next item
Datum = $C(Item+1) ; observation into variable called "Datum"
The resulting Facets specification file, CSVFDT.txt, is:
; FACFORM Version No. 1.20, May 4, 1992
; Run on 05-04-1992 19:37:33
; from Keyword file: CSVkey.txt
Facets = 2
Title = Nine Binomial Trials
Output = csvOUT.txt ;the FACETS output file
Models = ?,?,B9,1
2,Binomial Trial Items
Help for Facform Rasch Measurement Software: www.winsteps.com. Author: John Michael Linacre
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|Rasch Measurement Transactions (free, online)||Rasch Measurement research papers (free, online)||Probabilistic Models for Some Intelligence and Attainment Tests, Georg Rasch||Applying the Rasch Model 3rd. Ed., Bond & Fox||Best Test Design, Wright & Stone|
|Rating Scale Analysis, Wright & Masters||Introduction to Rasch Measurement, E. Smith & R. Smith||Introduction to Many-Facet Rasch Measurement, Thomas Eckes||Invariant Measurement with Raters and Rating Scales: Rasch Models for Rater-Mediated Assessments, George Engelhard, Jr. & Stefanie Wind||Statistical Analyses for Language Testers, Rita Green|
|Rasch Models: Foundations, Recent Developments, and Applications, Fischer & Molenaar||Journal of Applied Measurement||Rasch models for measurement, David Andrich||Constructing Measures, Mark Wilson||Rasch Analysis in the Human Sciences, Boone, Stave, Yale|
|in Spanish:||Análisis de Rasch para todos, Agustín Tristán||Mediciones, Posicionamientos y Diagnósticos Competitivos, Juan Ramón Oreja Rodríguez|
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