Dykstra 1..10

نویسنده

  • Alexander Gutschalk
چکیده

D ow lo The extent to which the contents of short-term memory are consciously accessible is a fundamental question of cognitive science. In audition, short-term memory is often studied via the mismatch negativity (MMN), a changerelated component of the auditory evoked response that is elicited by violations of otherwise regular stimulus sequences. The prevailing functional view of the MMN is that it operates on preattentive and even preconscious stimulus representations. We directly examined the preconscious notion of the MMN using informational masking and magnetoencephalography. Spectrally isolated and otherwise suprathreshold auditory oddball sequences were occasionally random rendered inaudible by embedding them in random multitone masker “clouds.” Despite identical stimulation/task contexts and a clear representation of all stimuli in auditory cortex, MMN was only observed when the preceding regularity (that is, the standard stream) was consciously perceived. The results call into question the preconscious interpretation of MMN and raise the possibility that it might index partial awareness in the absence of overt behavior. ad

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Enhanced Rewarding Properties of Morphine, but not Cocaine, in arrestin-2 Knock-Out Mice

Laura M. Bohn,1 Raul R. Gainetdinov,2 Tatyana D. Sotnikova,2 Ivan O. Medvedev,2 Robert J. Lefkowitz,3 Linda A. Dykstra,4 and Marc G. Caron2 1Department of Pharmacology, The Ohio State University College of Medicine and Public Health, Columbus, Ohio 43210, Departments of 2Cell Biology and 3Biochemistry and Medicine, Duke University Medical Center, Howard Hughes Medical Institute Laboratories, Du...

متن کامل

Stochastic Dykstra Algorithms for Metric Learning on Positive Semi-Definite Cone

Recently, covariance descriptors have received much attention as powerful representations of set of points. In this research, we present a new metric learning algorithm for covariance descriptors based on the Dykstra algorithm, in which the current solution is projected onto a half-space at each iteration, and runs at O(n) time. We empirically demonstrate that randomizing the order of half-spac...

متن کامل

Codes of Forest Practice and Related Research Needs

Codes of forest practice are sets of regulations or guidelines developed by governments or other organisations to assist forest managers select practices to be followed when carrying out forest management and utilisation operations. These practices, when correctly applied, should meet standards for sustainable forest management (Dykstra 1996; Dykstra and Heinrich 1996). A code of practice is al...

متن کامل

The Marinari - Parisi Model and Collective Field Theory

We derive the supersymmetric collective field theory for the Marinari-Parisi model. For a specific choice of the superpotential, to leading order we find a one parameter family of ground states which can be connected via instantons. At this level of analysis the instanton size implied by the underlying matrix model does not appear. 2/11/92 † bitnet jdcohn@fnal and dykstra@fnal .

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2015