ISSN:
1469-8986
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Medicine
,
Psychology
Notes:
The relationship between detection performance and various Event-Related Potential (ERP) components was investigated in an auditory threshold detection task at 4 times of day (9 a.m., 1 p.m. 5 p.m., and 9 p.m.) for 7 morning-type and 7 evening-type subjects. Measurements were made of oral temperature, detection efficiency (P(A)), response bias(β), the N115 and the P190 components following a warning stimulus, and the P450and the Slow Wave (SW) associated with correct signal-present decisions. For oral temperature and detection efficiency an upward diurnal trend was observed which tended to interact with subject type. For both the amplitude and the latency of the N115 and the P190 components intra-session decrement was found. The P190 latency decreased monotonically over the day. While the diurnal trend of the amplitude and latency of the Nl15 resembled that of the SW amplitude, reaching a relative maximum in the afternoon. The P450 showed no diurnal variation. Furthermore, the P450 and SW also differed as a function of the level of decision confidence. The P450 amplitude increased and its latency decreased with an increasing confidence level, whereas the SW amplitude decreased. The diurnal variations of the N115 and the SW are discussed in terms of fluctuating amounts of processing involved in different aspects of the task.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1469-8986.1982.tb02607.x
