1.3.12 • Public • Published


A light, full-stack framework for running high-level reasoning and cognitive science experiments in Node.js.

Bug fixes

  • Fixed circular dependency warnings + minor bugs
  • Added ability to save incomplete data
  • Added compatibility for Windows line-endings (caught by J. Korman)
  • Added new fn, hideProblem(), in showStimuli
  • Fixed checkbox bugs (caught by J. Korman)
  • Fixed logging errors (caught by J. Korman)
  • Eliminated references to external image files
  • Fixed slider value error (caught by J. Korman)
  • Fixed errors in documentation specification (caught by Z. Horne)
  • Created hanging indentation for radio- and choice-tasks

Preliminary Setup

$ sudo npm install -g shelljs       # nodus-ponens requires global installation of "shelljs"

Quick Start Guide

nodus-ponens is a full-stack framework for running high-level cognitive science experiments. It comes bundled with a fully-functional experiment template. To set the experiment up, run as follows:

$ mkdir temp
$ cd temp
$ npm install nodus-ponens
$ npm explore nodus-ponens -- npm run-script create-template
$ node main.js

The framework will launch a server-side monitoring console (in the terminal), and the experiment can then be viewed at http://localhost:55151.


var path             = require("path");
var fs               = require('fs');
var staticDirectory  = path.resolve("static");              // Set directory of static HTML+CSS files
var dataDirectory    = path.resolve("data");              // Set directory where data will be written
var participantIndex = 0;                            // Start participant numbering at this value + 1

var np               = require("nodus-ponens")(participantIndex, staticDirectory, dataDirectory);
np.authors           = "Authors";
np.experimentName    = "Template1";
np.port              = 55151;

// Note: The user has to define the function np.loadStimuli() that is intended to take a
// participant's ID number (an integer) as input and return an array of objects representing the
// stimuli catered to that participant. The function allows users to define stimuli directly, read
// stimuli from an external file, or pull stimuli from other resources. In the template file included
// with the experiment (see Quick Start Guide above), the function "setupStimuli" serves this purpose
// by importing experimental stimuli from a CSV file. Supposing that the user successfully defines
// this function, the nodus-ponens setup proceeds as follows:

function setupStimuli(PID)          // Takes integer input and returns stimuli as set of JSON objects
   /* Write appropriate stimuli generation code here ... */
   return stimuli;             // To randomize the order of the stimuli, return np.randomize(stimuli)

np.loadStimuli = setupStimuli;


(c) 2022 Sangeet Khemlani,, Creative Commons License.




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