DISFILE= category/distractor/option count file

DISFILE=filename produces an output file containing the counts for each distractor or option or category of each item, similar to Table 10.3. This file contains 1 heading lines (unless HLINES=N), followed by one line for each CODES= of each item (whether the code is observed for the item or not) containing:

Columns:
Start:	End:	Heading	Description
1	10	ITEM	Item entry number
11	20	CODE	Response code in CODES= or *** = missing
21	25	VALUE	Numerical value of the response code (directly or with KEYn=, NEWSCORE=, IVALUEx=, MISSCORE= etc.). -1 means "response is ignored"
27	30	SCORE	Score used for estimating the Rasch item measure (after recounting, weighting, etc.). -1 means "response is ignored"
31	40	ALL	Count of all response codes in data set (excludes missing except for "MISSING" lines)
41	50	ALL%	Percent of ALL responses to this item
51	60	USED	Count of response codes used for measurement (non-extreme persons and items)
61	70	USED	% of USED responses to this item
71	80	AVGE MEAS	Average person measure for these used responses
81	90	S.E. MEAS	Standard Error of average person measure
91	100	OUTF MNSQ	Outfit Mean-square of responses in this category.
101	110	PTMEA	Point-measure correlation or PTBSA Point-biserial PTBIS=A for for this response (distractor, option). Scored responses are correlated only with scored responses. Missing responses are correlated with all responses.
112	-	LABEL	Item label

Since the DISFILE= has the same number of CODES= and MISSING "***" entries for every item, the repeated fields are filled out with "0" for any unobserved response codes.

Percentages for non-missing response-scores are computed based on total count of non-missing response scores. Percentages for missing response-scores are computed based on total count of all response scores.

When CSV=Y, commas separate the values with quotation marks around the "Item label", response in CODES=, and ***. When CSV=T, the commas are replaced by tab characters.

Example: You wish to write a file on disk called "DISCOUNT.TXT" containing the item distractor counts from table 14.3, for use in constructing your own tables:

ITEM CODE VALUE SCORE ALL ALL % USED USED % AVGE MEAS S.E. MEAS OUTF MNSQ PTMEA LABEL