TY  - JOUR
PY  - 2009//
TI  - Knowledge of results and signal salience modify vigilance performance and cerebral hemovelocity
JO  - Proceedings of the Human Factors and Ergonomic Society annual meeting
A1  - Shaw, Tyler H.
A1  - Parasuraman, Raja
A1  - Sikdar, Siddhartha
A1  - Warm, Joel
SP  - 1062
EP  - 1065
VL  - 53
IS  - 17
N2  - Transcranial Doppler sonography was used to measure cerebral blood flow velocity (hemovelocity, CBFV) from the left and right middle cerebral arteries during the performance of a 30-min simulated air-traffic control task in which knowledge of results (KR) and signal salience were manipulated. Critical signals were situations in which the simulated aircraft were on a potential collision course. Findings show that overall signal detection and CBFV both declined over time. While performance was more stable over time in the KR condition, performance declined in the no-KR condition. In addition, the initial level and temporal decline in CBFV were both greater for the KR condition than the no-KR condition. Results are interpreted in terms of the motivational effects induced by feedback and a resource model of vigilance.<p /> <p>Language: en</p> 
LA  - en
SN  - 2169-5067
UR  - http://dx.doi.org/10.1177/154193120905301704
ID  - ref1
ER  -