Psignifit(1) A program for fitting and testing hypotheses about psychometric functions.


Psignifit allows fitting of psychometric functions to datasets while maintaining full control over a large number of parameters. Data can either be read from text files or passed through a pipe.
Psignifit performs the calculation of confidence intervals as well as goodness-of-fit tests. Psignifit accepts input in a number of different ways:
From named text files:
psignifit <data> <preferences>

Entirely from the console:
psignifit (...)
(enter data and preferences from the console and then send an EOF character - Ctrl-D in most UNIX shells)

Partly from named text files, partly from the console:
psignifit <data> <preferences> -

Through a pipe:
cat <data + preferences> | psignifit

Or via a mixture of piped input on stdin and files named on the command line:
echo "#random_seed 12345" | cat <preferences> | psignifit <data> -

For more documentation see the files in the /usr/share/doc/psignifit directory or visit


An example dataset and fitting preferences can be found in /usr/share/doc/psignifit/examples


A regression test for psignifit can be found in /usr/share/doc/psignifit/tests


Psignifit was written by Jeremy Hill.

This manual page was written by Michael Hanke <[email protected]>, for the Debian project (but may be used by others).