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The Black Box Toolkit Page 71 of 98

9. STEP-BY-STEP CASE STUDY

9.1. Using the Black Box Toolkit to investigate the effect of using several different

mice as response devices in a simple visual reaction time paradigm

The best overview of the Black Box Toolkit is one where it is actually used in the field. The

case study outlined is a replication of work published by “Plant, R.R., Hammond, N.V. &

Whitehouse T. (2003), How choice of mouse may effect response timing in psychological

studies, Behavior Research Methods, Instruments and Computers 35(2), 276-284”. Here

the researcher wants to know the contribution that a given response device has on their

paradigm in terms of presentation and response timing. In this example E-Prime is being

used, although any Experiment Generator would be likely to produce similar results.

The paradigm itself examines simple visual reaction time. A remote PC running E-Prime

displays a stimulus image and waits for a response via the mouse. Once a response is

detected the image terminates and the paradigm then displays a black screen for 500ms

before displaying the next image in the sequence.

remote PC running E-Prime

• E-Prime 1.1 SP3 (www.pstnet.com

)

• 800x600 16bit colour on a CRT monitor run at 100Hz (10ms screen redraw)

• 8x 800x600 bitmaps, 2 runs of 8 trials (not randomised)

• NEC 19” monitor running at 100Hz (verified)

• Windows 2000 SP4 with Direct X 9.0a

• Athlon 900Mhz with 128Mb 133 SDRAM

• ATI Rage graphics card with 16Mb

• 30Gb Hard Drive

• AC 97 on-board sound (note E-Primes voice key connects to its own serial

response box)

• Various response devices:

o PS/2 AMI mouse

o PS/2 OEM “unbranded” mouse

o PS/2 cherry 102 key keyboard

o E-Prime deluxe four button response box

o E-Prime microphone/voice key

Host PC running the Black Box Toolkit

• 1800 Athlon XP with 512Mb DDR RAM

• Windows 2000 SP4

• Standard parallel port (IEEE 1284) running in EPP 1.9 (switchable in the BIOS

between 1.7/1.9 modes)

• The IEEE 1284 version of the Black Box Toolkit (parallel port)

• 1x BBTK Tone Generator (3.5mm jack)

• 5x switch closure leads soldered to the primary button/key of the response device

on the remote PC (2.5mm jack)

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Black Box IEEE 1284 Guia do Utilizador Página 71