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  1. No Access

    Article

    Effects of Amplitude-Frequency Characteristics of a Noise-Masked Test Stimulus on the Shapes of Visual Evoked Potentials

    Visual evoked potentials produced in response to a reversive checkerboard pattern presented in conditions of additive noise were recorded. Changes induced by noise in both the shapes of evoked potentials and t...

    A. V. Merkul’ev, N. S. Merkul’eva in Neuroscience and Behavioral Physiology (2009)

  2. No Access

    Article

    Phenomenological Description of Local Extremes on Contrast Sensitivity Curves

    Previous studies have demonstrated that human contrast sensitivity curves have marked extremes [4]. This phenomenon has not yet been investigated. The present report describes studies of plots of frequency-con...

    A. V. Merkul’ev, D. Yu. Rogovanov in Neuroscience and Behavioral Physiology (2009)

  3. No Access

    Article

    Optical-geometrical characteristics of fragmented figures and integral perception thresholds in repeated tests

    The causes of reductions in the integral perception threshold for fragmented figures in repeat trials using the Gollin test were investigated. The first study involved four trials with 5-day intervals using on...

    A. V. Merkul’ev in Neuroscience and Behavioral Physiology (2008)

  4. No Access

    Article

    The Threshold Signal:Noise Ratio in the Perception of Fragmented Figures

    Perception thresholds were measured for fragmented outline figures (the Gollin test). A new approach to the question of the perception of incomplete images was developed. In this approach, figure fragmentation...

    A. V. Merkul'ev, S. V. Pronin, L. A. Semenov… in Neuroscience and Behavioral Physiology (2006)

  5. No Access

    Article

    The Optical-Geometrical Characteristics and Thresholds of Perception of Fragmented Outline Figures

    Measurements were made of the threshold of recognition of cumulatively forming line figures. The threshold value of the outline, expressed in pixels, depended on the length of the outline of the whole unfragme...

    A. V. Merkul'ev, Yu. E. Shelepin, V. N. Chikhman… in Neuroscience and Behavioral Physiology (2005)