---
name: "psignifit"
section: "1"
platform: "linux"
package: "psignifit"
version: "2.5.6-8+b2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/psignifit"
---

# psignifit(1)

A program for fitting and testing hypotheses about psychometric functions.

## NAME

**Psignifit** - A program for fitting and testing hypotheses about psychometric functions.

## DESCRIPTION

**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 *http://bootstrap-software.org/psignifit/*

## EXAMPLES

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

## TEST

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

## AUTHOR

**Psignifit** was written by Jeremy Hill.

This manual page was written by Michael Hanke \<michael.hanke@gmail.com\>, for the Debian project (but may be used by others).