2 resultados para Orbital blocking
em Brock University, Canada
Resumo:
Calculations are performed on the \S <:Jd ground states of
d ' +
the H and HC) molecules using a basis set of non-integral
~ ~ I
elliptical orbitals. Different variational wavefunctions constructed
i- for H~ involved one parameter to three par~~eter variation.
In order to l"'educe the ntunber of parameters in most commonly
0-
used basis orbitals set, the importance of the term (,+~)
Y\ over the term ;u 'Where n is a variational pararneter and the value
of cr may be given by boundary condition or cusp condition is
outlined in Chapters II and III. It is found that the two parameter
-+
Resumo:
Neural models of the processing of illusory contour (ICs) diverge from one another in terms of their emphasis on bottom-up versus top-down constituents. The current study uses a dichoptic fusion paradigm to block top-down awareness of ICs in order to examine possible bottom-up effects. Group results indicate that the N170 ERP component is particularly sensitive to ICs at central occipital sites when top-down awareness of the stimulus is permitted. Furthermore, single-subject statistics reveal that the IC N170 ERP effect is highly variable across individuals in terms of timing and topographical spread. The results suggest that the ubiquitous N170 effect to ICs found in the literature depends, at least in part, on participants’ awareness of the stimulus. Therefore a strong bottom-up model of IC processing at the time of the N170 is unlikely.