Chronos Adapter for Neuro Omega [44296]

This article applies to:

E-Prime 3.0

Chronos

Detail

Experiment Author: Psychology Software Tools, Inc.

The Chronos Adapter for Neuro Omega sample experiment illustrates how to use Task Events to send markers from the E-Prime experiment to Neuro Omega.

Abstract

The sample experiment presents a Visual Oddball Task: each trial presents the letter "O" or "X" and the participant's task is to distinguish between these letters. 80% of the trials present the letter "O" and 20% of the trials present the letter "X". The experiment sends the marker value 1 when the letter "O" is shown and the value 32768 when the letter "X" is shown.

The Chronos Adapter for Neuro Omega provides access to 16 digital outputs (from Chronos to Neuro Omega) and eight digital inputs (from Neuro Omega to Chronos) as shown below:

This sample experiment illustrates the digital output functionality. When Chronos sends a marker on its first digital output, Neuro Omega receives it on PORT-1 D.In 1 (pin 1). When Chronos sends a marker on its sixteenth digital output, Neuro Omega receives it on PORT-1 D.In 16 (pin 21). To determine which pin receives a value from Chronos, do the following:

1. Represent the integer marker being sent as a binary number (see INFO: Choosing a marker value to send from E-Prime to an external device [42529] for more information on integer and binary numbers).
2. Map the binary number to Chronos's digital outputs to determine which outputs are set high (set to 1).
3. Examine which Neuro Omega pin maps to the Chronos digital outputs that are set high.

For example, the sample sends the integer value 1 when the stimulus = the letter "O":

1. Integer value 1 equals the binary number 0000 0001 (Least Significant Bit is the right-most bit).
2. 0000 0001 sets the first Chronos digital output high; all other digital outputs are low.
3. As shown in the table above, the first Chronos Digital Outputs maps to Neuro Omega PORT-1 D.In 1 (pin 1).

The sample sends the integer value 32768 when the stimulus = the letter "X":

1. Integer value 32768 equals the binary number 1000 0000 0000 0000.
2. 1000 0000 0000 0000 sets the sixteenth Chronos digital output high; all other digital outputs are low.
3. The sixteenth Chronos Digital Output maps to Neuro Omega PORT-1 D.In 16 (pin 21).

NOTE:To configure the E-Prime experiment to receive signals sent from Neuro Omega to one of the Chronos adapter's eight digital inputs, create an InputMask for the Chronos device that looks for the pseudo button responses 1, 2, 3, 4, 5, 6, 7, and/or 8, which map to Chronos digital inputs 1, 2, 3, 4, 5, 6, 7, 8. See Section 6.2 Pseudo Buttons of the Chronos Operator Manual and DEVICE: How To: Synchronize E-Prime with an incoming marker/press via an Input Mask [34380] for details.

NOTE:Extract all the files in the attached .zip file to the same folder. The sample experiment displays images that must be located in the same folder as the experiment.