SPSS® 12.0 Command Syntax Reference

ALL All applicable summary statistics.
METHOD Subcommand
RELIABILITY 1381
By default, RELIABILITY uses a computational method that does not require the calculation
of a covariance matrix wherever possible. METHOD forces RELIABILITY to calculate the covariance
matrix. Only a single specification applies to METHOD:
COVARIANCE Calculate and use the covariance matrix, even if it is not needed.
If METHOD is not specified, RELIABILITY computes the covariance matrix for all variables on
each VARIABLES subcommand only if any of the following is true:
• You specify a model other than ALPHA or SPLIT.
• You request COV, CORR, FRIEDMAN, or HOTELLING on the STATISTICS subcommand.
• You request anything other than TOTAL on the SUMMARY subcommand.
• You write the matrix to a matrix data file, using the MATRIX subcommand.
MISSING Subcommand
MISSING controls the deletion of cases with user-missing data.
• RELIABILITY deletes cases from analysis if they have a missing value for any variable
named on the VARIABLES subcommand. By default, both system-missing and usermissing
values are excluded.
EXCLUDE Exclude user-missing and system-missing values. This is the default.
INCLUDE Treat user-missing values as valid. Only system-missing values are excluded.
MATRIX Subcommand
MATRIX reads and writes SPSS matrix data files.
• Either IN or OUT and the matrix file in parentheses are required. When both IN and OUT
are used on the same RELIABILITY procedure, they can be specified on separate MATRIX
subcommands or on the same subcommand.
• If both IN and OUT are used on the same RELIABILITY command and there are grouping
variables in the matrix input file, these variables are treated as if they were split variables.
Values of the grouping variables in the input matrix are passed on to the output matrix (see
“Split Files” on p. 1382).
OUT (filename) Write a matrix data file. Specify either a filename or an asterisk (*), enclosed
in parentheses. If you specify a filename, the file is stored on disk and can be
retrieved at any time. If you specify an asterisk, the matrix file replaces the
working data file but is not stored on disk unless you use SAVE or XSAVE.
IN (filename) Read a matrix data file. If the matrix data file is the working data file, specify
an asterisk (*) in parentheses. If it is another file, specify the filename in