Selection: Several specifications require or allow the choice of columns in the item label, person label or data record. There are several formats:
Specification= |
DGF=, DIF=, DPF=, EQFILE=, IAFILE=, IMAP=, IPMATRIX=, ISORT=, ISUBTOT=, IWEIGHT=, PAFILE=, PKMAP=, PMAP=, PSORT=, PSUBTOT=, PWEIGHT=, @Fieldname= |
Specification=S...W... Specification=S...E... Specification=...-... |
S or s is the starting column in the person or item label W or w is the width in columns E or e is the ending column in the label - indicates the column range |
DPF=$S1W1 or DIF= DPF=S1W1 DPF=1W1 DPF=1 |
means "use the section of the item (or person) label starting in column 1 of the label with a width of 1 column". To select all the items (or persons), DPF= column number higher than length of label |
DPF=$S3W2 DPF=S3W2 DPF=3W2 |
means "use the section of the item (or person) label starting in column 3 of the label with a width of 2 columns". |
DPF=$S3E4 DPF=S3E4 DPF=3E4 DPF=3-4 |
means "use the section of the item (or person) label starting in column 3 of the label and ending in column 4". |
Specification=C...W... Specification=C...E... Specification=c...w... Specification=c...e... |
C or c is the starting column in the item label or person data record W or w is the width in columns E or e is the ending column in the data record This always works if the columns are within the person or item label. If the columns referenced are in the data record, but outside the person label, the information may not be available. |
PWEIGHT = $C203W10 PWEIGHT = C203W10 PWEIGHT = C203E212 |
means "person weighting is in column 203 of the data record, with a width of 10 columns, ending in column 212" |
Specification=$N Specification=@ILABEL Specification=@PLABEL |
entry number this matches the length of the longest item label this matches the length of the longest person label |
Specification = @Fieldname |
selects one or a block of columns as specified by a prior @Fieldname= instruction |
@AGE = 2E3 PSUBTOTAL = @AGE |
the person's age is in columns 2 and 3 of the person label: subtotal the persons by age classifier |
Specification=MA3 Specification=MD2 |
M = Measure A = Ascending or D = Descending 1 or higher integer: number of strata e.g., MA3 = Measures Ascending in 3 ability strata |
Specification=OMA3 Specification=ILD4 |
I = Infit, O = Outfit M = Mean-square, L = Log-mean-square, Z = ZSTD A = Ascending or D = Descending 1 or higher integer: number of strata e.g., FILD2 = Fit - Infit - Log-scaled - Descending -2 fit strata |
Strata: MA3, etc. |
Strata are equally long divisions of the reported range of the statistic. Stratum number for this value = Max(1+ Number of strata * (Current value - Lowest reported value)/(Highest reported value - Lowest reported value), Number of strata) |
DIF=MA3 PSUBTOTAL=MA3 PMAP=MA3 |
Non-uniform DIF for 3 ability strata Output DIF Table Person sub-total for same 3 ability strata Output subtotal Table Show ability strata on the person map Output person map |
Specification = selection + selection |
+ signs can be used to concatenate selections |
IMAP = 3-4 + 8W3 |
show in Table 12 columns 3, 4, 8, 9, 10 of the item label. |
Specification = "..." Specification = '...' |
constants in quotes can be included with selection. |
PMAP = 3 + "/" + 6 |
show in Table 15 column 3, a slash, and column 6 of the person label, e.g., F/3 |
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Multiple-format specifications: |
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IAFILE = * |
the item anchor values follow this specification in a list |
IAFILE = 3-7 |
the item anchor values are in columns 3-7 of the item label |
IAFILE = filename.txt |
the item anchor values are in the file called "filename.txt" |
