The Serial Response Box features a 0 millisecond debounce period. This is something that simply cannot be achieved from a standard keyboard!
PST has engineered the Serial Response Box so that the response is time stamped and then the signal is verified for accuracy.
A standard keyboard verifies the accuracy of the signal before the response is time stamped. The problem of variable debounce periods found on keyboards is solved with the Serial Response Box!
Best of all, the Serial Response Box connects directly to the PC via the serial port! No additional hardware is required.
The Serial Response Box consists of the following items:
For Serial Response Box Serial to USB converter information, read KB article 1835.
SRBOX Tutorial (194KB zip file) Includes the Tutorial.pdf, Tutorial: Modify Tutorial.es to accept Serial Response Box input, along with the Tutorial.es file.
SRBOX Sample For E-Prime (547KB zip file) An E-Studio experiment testing SRBOX functionality and illustrating use of the SRBOX with E-Prime.
This product is intended for research use only.
Refresh Detector System
The Serial Response Box includes a Refresh Detector System which is used to determine how many times a second the computer screen is redrawn or refreshed.
The Serial Response Box features 5 keys. Single key presses, key presses and releases as well as n-key rollover responses (e.g., collect information about key responses which overlap in time) are supported. The number of keys can be increased to 8 for use with E-Prime® via the integrated expansion port (see the Custom Expansion Kit). The keys can be labeled in accordance with your experiment. Place a label inside the keycaps of the Serial Response Box's 5 keys. PST ships 5 sheets of labels with every Serial Response Box ordered.
The Serial Response Box features 5 lamps. Samples of 5 colored lamp covers are also included with the Serial Response Box. The lamp covers are easily interchangeable.
Voice Key The Serial Response Box also features an integrated voice key. The voice key allows you to collect vocal latencies with confidence. This is not to be confused with the ability to record actual vocal responses. To record vocal responses we suggest the use of an external recorder. The voice key features both a hardware volume control and sensitivity control via E-Prime®.
Q: Why do I need the Refresh Detector System?
A: The PST Refresh Detector System was designed for use in conjunction with the Serial Response Box and E-Prime. It is included with the purchase of the Serial Response Box. It is used to determine how many times per second the computer screen is redrawn or refreshed. The PST Refresh Detector System is quite useful for experiments with very brief display durations (i.e. under 100 milliseconds). It is critical that you take your hardware (as it relates to your experimental design and stimulus presentation) into consideration.
The PST Refresh Detector System allows the researcher to find out the precise timing of their screen’s refresh rate (or redraw time).
Precise timing information of screen refresh is crucial to experiments that use very short display times. For example: if you wanted to run an experiment in which the subject is presented with a word on the computer screen for less than 30 milliseconds, it would be very important to know if your monitor could refresh a screen that quickly. That is, you must determine if your computer hardware is capable of presenting the word and then erasing or masking the word (two screen updates) within 30 milliseconds.
Features at a glance:
Testing of the Refresh Detector system should be performed in low ambient light conditions. Bright background light can interfere with the Refresh Detector and cause erroneous readings.
The Serial Response Box is available for purchase through our online store.
Price (US Dollars)
Serial Response Box includes the Refresh Detector System
Custom Expansion Kit
All prices are provided in US funds. Prices do not include the cost of shipping and handling and are subject to change without notice.
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