Vienna Test System: Signal-Detection


Summary of Test Review

General description of Test


Test Review Summary

Test Name:Vienna Test System: Signal-Detection
Author of Original Test: Gernot Schuhfried
Local test distributor / publisher:Schuhfried
Date of Current Review:23 May 2007
Date of Publication of Current Review / Edition:09 Aug 2007
Type of Test:Attention and Visual Differentiation
Main Area of Use:Psycho-neurological
Work and Occupational
Constructs Measured:Attention
Visual Differentiation
Administration Mode:Computerised locally-installed application - supervised/proctored
Response Mode:Computerised
General Description of Test:The Vienna Test System is a computerised collection of tests and assessments that can be used alone or combined as batteries of tests. The system contains some 74 instruments covering work, health and education and categorised as Intelligence, General Ability, Special Ability, Personality Structure, Attitude and Interests and Clinical tests. Many of the tests are multi-lingual with the majority being in German and English. Those tests that are produced in the English Language and have not been reviewed elsewhere are reviewed here as individual tests. SIGNAL is one of eight General Ability Tests within the fully computerised Vienna Test System. SIGNAL is a general performance test for the quantification of attention and visual differentiation. Based on signal detection theory, it assesses the registration of visual stimuli under time pressure over a long period of time. Test administration is possible with adults and children from seven years of age. The entire screen is covered with dots, some of which randomly disappear while other new ones appear. The test taker is required to respond when the critical stimulus (four dots forming a square) appears. The test taker responds through a computer keyboard or the VTS input device. There are four non parallel test forms (S1-S4) which differ in terms of foreground/background colour and signal duration. The tests are all 20 minutes in duration. S1 (Standard)presents white signals on a black background, whilst for S2 (Standard) this is reversed with black signals on a white background. S3 (Short duration) presents a short signal duration. S4 tests signal balance.

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