Abstract This paper presents results from psychophysical experiments on human binocular rivalry in central and peripheral vision. Results show that the incidence of periods exclusive visibility a given eye's rival target increased with decreasing size, for sized retinal eccentricity. Control measures confirmed these were not attributable solely to reduced acuity, Troxler's effect, or spatial frequency. We computed minimum-sized stimulus would lead criterion level one other eye; this we term...

An improved sufficient condition for asymptotic stability developed the monotone nonlinearity is <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Re [Z(j\omega) (G(j\omega) + 1/k_{2})]</tex> or [Z(j\omega,) \bar(G(j\omega) 1/k_{2})] \geq 0</tex> where xmlns:xlink="http://www.w3.org/1999/xlink">Z(s)=1+\alphas+Y(s)</tex> and xmlns:xlink="http://www.w3.org/1999/xlink">\int\min{0}\max{\infty}|y(t)|dt&lt;1</tex> . Examples of allowed...

A sufficient condtion given for the asymptotic stability of a system having single monotonic nonlinearity with slope confined to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">[0, k_{2}]</tex> and transfer function xmlns:xlink="http://www.w3.org/1999/xlink">G(j\omega)</tex> , is xmlns:xlink="http://www.w3.org/1999/xlink">Re(1 + X(j\omega) Y(j\omega) \alphaj\omega)(G(j\omega) 1/k_{2}) \geq 0</tex> where...

To examine the relationship between athlete drinking motives and hazardous across differing levels of sporting participation (club vs elite-provincial elite-international).Data from 1214 New Zealand sportspeople was collected. We assessed with WHO's AUDIT questionnaire sportspeople's psychosocial reasons for ADS. Level (club/social, provincial/state, or international/olympic level) also assessed.Hazardous behaviours differed participation, showing highest level drinking, club/social next...

Research shows that the visual system monitors environment for changes. For example, a left-tilted bar, deviant, appears after several presentations of right-tilted standards, elicits classic mismatch negativity (vMMN): greater deviants than standards in event-related potentials (ERPs) between 100 and 300 ms onset deviant. The vMMN is contributed to by adaptation; it can be distinguished from genuine that, through use control conditions, compares are equally adapted physically identical. To...

An improved sufficient condition developed for the asymptotic stability of a sampled-data system having single monotonic nonlinearity, with slope in sector <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">(0, k_{2})</tex> and pulse transfer function xmlns:xlink="http://www.w3.org/1999/xlink">G^{\ast}(z)</tex> , is xmlns:xlink="http://www.w3.org/1999/xlink">Re [(1+X^{\ast}(z)+Y^{\ast}(z))(G^{\ast}(z)+I/k_{2})]\geq0</tex>...

This paper presents necessary and sufficient conditions for a function to be the driving point impedance of network composed uniform RC lines all having same product connected in an arbitrary manner. Foster type realizations are developed satisfying these conditions. Analogous vector approach <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">s</tex> plane analysis lumped circuits, method determining frequency response transfer functions P = cosh...

GENERAL COMMENTARY article Front. Hum. Neurosci., 04 February 2015Sec. Brain Imaging and Stimulation Volume 9 - 2015 | https://doi.org/10.3389/fnhum.2015.00038

Measures of the size various hand parts and their viewing distance when held at arm's length were made on one hundred eighteen undergraduate students. A simple rule thumb can be confirmed: Visual angle width is about 2 deg. The thumbnail subtends 1.5 deg index fingernail 1 in width, both are length. These figures good approximations for males females, although a significant, direct, linear relationship exists between hand-part visual part

When something appears, how soon is the first neural correlate of awareness it, and where that activity in brain? To answer these questions, we measured electroencephalogram under conditions which visual stimuli changed identically but differed. We manipulated by using binocular rivalry between orthogonal gratings viewed one to each eye. Then orientation grating eye be same as other Because rivalry, sometimes this happened visible grating, producing a clear change perceived orientation,...

Prediction error is a basic component of predictive-coding theory brain processing. According to the theory, each stage processing sensory information generates model current input; subsequent input compared against and only if there mismatch, prediction error, further performed. Recently, Smout colleagues found that signature visual (v) mismatch negativity (MMN), for fundamental property input—its orientation—was absent without endogenous attention on stimuli. This remarkable because weight...

Studies have shown that blur can act as a pictorial cue to depth perception. But blurring stimulus reduces its contrast, and studies also contrast To determine whether separate influences on perception, each variable was independently manipulated in two experiments. Observers reported alternations simple reversible figure. Both were found influence but had greatest effect at moderate contrasts. When blurred sharp stimuli equated either Michelson or RMS continued affect Hence of contrast. It...

Binocular rivalry was induced between two orthogonal square-wave gratings of the same spatial frequency, luminance, contrast, and field size, presented dichoptically. One could be instantly replaced by a third grating differing only in orientation. In one experiment subjects were required to respond as soon an orientation change noticed, withhold response catch trials (no change). When changes made visible grating, reaction time found U-shaped function magnitude change. undergoing...

Vernier acuity has usually been tested with stimuli of the same contrast polarity (SC). This traditional vernier was compared to that obtained opposite-contrast (OC) in which one target brighter than background and other darker. For both bar dot targets OC about half as good SC stimuli. There were large individual differences size disadvantage stimuli, although thresholds remained within hyperacuity range. also individually-differing biases see a dark stimulus on or side bright stimulus....