Parallel Processing in Visual Search Asymmetry (2008)
Barbara Anne Dosher, Songmei Han, Zhong-lin Lu
The difficulty of visual search may depend on assignment of the same visual elements as targets and distractors—search asymmetry. Easy C-in-O searches and difficult O-in-C searches are often...
Neural Correlates of Envisioning Emotional Events in the near and Far Future (2008)
D'Argembeau, Arnaud, Xue, Gui, Lu, Zhong-Lin, Van Der Linden, Martial, Bechara, Antoine
Being able to envision emotional events that might happen in the future has a clear adaptive value. This study addressed the functional neuroanatomy of this process and investigated whether it is...
O-(tert-Butyldimethylsilyl)tris(O-4-methylphenylsulfonyl)pentaerythritol (2008)
Shu-Xian Li, Hua-Min Li, Zhong-Lin Lu, Hoong-Kun Fun, Suchada Chantrapromma
In the title compound [systematic name: (tert-butyldimethylsilyl)methanetriyl tris(4-methylbenzenesulfonate)], C32H44O10S3Si, the central C atom and the SiIV center are in a tetrahedral...
The effects of skin tone on race-related amygdala activity: an fMRI investigation (2007)
Ronquillo, Jaclyn, Denson, Thomas F., Lickel, Brian, Lu, Zhong-Lin, Nandy, Anirvan, Maddox, Keith B.
Previous work has shown differential amygdala response to African-American faces by Caucasian individuals. Furthermore, behavioral studies have demonstrated the existence of skin tone bias, the...
The effects of skin tone on race-related amygdala activity: an fMRI investigation (2007)
Ronquillo, Jaclyn, Denson, Thomas F., Lickel, Brian, Lu, Zhong-Lin, Nandy, Anirvan, Maddox, Keith B.
Previous work has shown differential amygdala response to African-American faces by Caucasian individuals. Furthermore, behavioral studies have demonstrated the existence of skin tone bias, the...
Perceptual learning without feedback in non-stationary contexts: Data and model (2006)
Alexander A. Petrov, Barbara Anne Dosher, Zhong-Lin Lu
The role of feedback in perceptual learning is probed in an orientation discrimination experiment under destabilizing non-stationary conditions, and explored in a neural-network model....
The dynamics of perceptual learning: an incremental reweighting model (2005)
Er A. Petrov, Barbara Anne Dosher, Zhong-lin Lu
The mechanisms of perceptual learning are analyzed theoretically, probed in an orientationdiscrimination experiment involving a novel nonstationary context manipulation, and instantiated in a...
Characterizing and modeling temporal dynamics of perceptual decision making (2004)
Chu, Wilson, Lu, Zhong-Lin, Dosher, Barbara Anne
We combined the external noise method (1) with the cue-to-respond speed accuracy trade-off (SAT) paradigm (2) to characterize the temporal dynamics of perceptual decision making. Observers were...
Sine-wave grating adaptation selectively reduces the gain of the adapted stimulus (2004)
Dao, Debbie Yen, Lu, Zhong-Lin, Dosher, Barbara Anne
Adapting to a sinusoidal grating selectively reduces contrast sensitivity to subsequent stimuli of the adapted stimulus orientation and spatial frequency (Blakemore & Campbell, 1969). Both...
Temporal tuning characteristics of perceptual templates (2004)
Jeon, Simon, Lu, Zhong-Lin, Dosher, Barbara Anne
External noise presented in temporal contiguity with a target impairs perceptual performance, reflecting the temporal tuning of the perceptual template. Deriving the temporal weights of the...
Timecourse and Temporal Dynamics of Attention in Visual/Auditory Central/Peripheral Cuing (2004)
Lesmes, Luis A., Lu, Zhong-Lin, Dosher, Barbara Anne
Timecourse is a performance signature of attention systems 1. In this study, an attention reaction paradigm2 measures the timecourse of attention in visual central (VC), visual peripheral (VP),...
Motion deficits in dyslexia are restricted to high external noise displays (2004)
Sperling, Anne J., Lu, Zhong-lin, Manis, Franklin R.
Studies of motion perception in dyslexia have usually used random dot kinetograms with high external noise. Is the reported motion deficit in dyslexia due to deficiencies in motion perception per se,...
Mechanism of Perceptual Attention (1998)
Attending to some visual inputs rather than others has significant consequences for performance in everyday and industrial tasks that require the monitoring of complex displays. Attention may affect...
Measuring the amplification of attention
Blaser, Erik, Sperling, George, Lu, Zhong-Lin
An ambiguous motion paradigm, in which the direction of apparent motion is determined by salience (i.e., the extent to which an area is perceived as figure versus ground), is used to assay the...
The mechanism of isoluminant chromatic motion perception
Lu, Zhong-Lin, Lesmes, Luis A., Sperling, George
An isoluminant chromatic display is a color display in which the component colors have been so carefully equated in luminance that they stimulate only color-sensitive perceptual mechanisms and not...
Invariance between subjects of brain wave representations of language
Suppes, Patrick, Han, Bing, Epelboim, Julie, Lu, Zhong-Lin
In three experiments, electric brain waves of 19 subjects were recorded under several different experimental conditions for two purposes. One was to test how well we could recognize which sentence,...
Invariance of brain-wave representations of simple visual images and their names
Suppes, Patrick, Han, Bing, Epelboim, Julie, Lu, Zhong-Lin
In two experiments, electric brain waves of 14 subjects were recorded under several different conditions to study the invariance of brain-wave representations of simple patches of colors and simple...
Perceptual motion standstill in rapidly moving chromatic displays
Lu, Zhong-Lin, Lesmes, Luis A., Sperling, George
In motion standstill, a quickly moving object appears to stand still, and its details are clearly visible. It is proposed that motion standstill can occur when the spatiotemporal resolution of the...
Dosher, Barbara Anne, Lu, Zhong-Lin
To investigate the nature of plasticity in the adult visual system, perceptual learning was measured in a peripheral orientation discrimination task with systematically varying amounts of external...
Brain wave recognition of words
Suppes, Patrick, Lu, Zhong-Lin, Han, Bing
Electrical and magnetic brain waves of seven subjects under three experimental conditions were recorded for the purpose of recognizing which one of seven words was processed. The analysis consisted...
Brain-wave recognition of sentences
Suppes, Patrick, Han, Bing, Lu, Zhong-Lin
Electrical and magnetic brain waves of two subjects were recorded for the purpose of recognizing which one of 12 sentences or seven words auditorily presented was processed. The analysis consisted of...
Fast decay of iconic memory in observers with mild cognitive impairments
Lu, Zhong-Lin, Neuse, James, Madigan, Stephen, Dosher, Barbara Anne
In a previous clinical report, unusually fast decay of iconic memory was obtained from a subject who later developed Alzheimer's disease. By using the partial-report paradigm, iconic memory (a form...
Independent perceptual learning in monocular and binocular motion systems
Lu, Zhong-Lin, Chu, Wilson, Dosher, Barbara Anne, Lee, Sophia
Eye-transfer tests, external noise manipulations, and observer models were used to systematically characterize learning mechanisms in judging motion direction of moving objects in visual periphery...
Measuring the amplification of attention
Blaser, Erik, Sperling, George, Lu, Zhong-Lin
An ambiguous motion paradigm, in which the direction of apparent motion is determined by salience (i.e., the extent to which an area is perceived as figure versus ground), is used to assay the...
The mechanism of isoluminant chromatic motion perception
Lu, Zhong-Lin, Lesmes, Luis A., Sperling, George
An isoluminant chromatic display is a color display in which the component colors have been so carefully equated in luminance that they stimulate only color-sensitive perceptual mechanisms and not...
Invariance between subjects of brain wave representations of language
Suppes, Patrick, Han, Bing, Epelboim, Julie, Lu, Zhong-Lin
In three experiments, electric brain waves of 19 subjects were recorded under several different experimental conditions for two purposes. One was to test how well we could recognize which sentence,...
Invariance of brain-wave representations of simple visual images and their names
Suppes, Patrick, Han, Bing, Epelboim, Julie, Lu, Zhong-Lin
In two experiments, electric brain waves of 14 subjects were recorded under several different conditions to study the invariance of brain-wave representations of simple patches of colors and simple...
Perceptual motion standstill in rapidly moving chromatic displays
Lu, Zhong-Lin, Lesmes, Luis A., Sperling, George
In motion standstill, a quickly moving object appears to stand still, and its details are clearly visible. It is proposed that motion standstill can occur when the spatiotemporal resolution of the...
Dosher, Barbara Anne, Lu, Zhong-Lin
To investigate the nature of plasticity in the adult visual system, perceptual learning was measured in a peripheral orientation discrimination task with systematically varying amounts of external...
Brain wave recognition of words
Suppes, Patrick, Lu, Zhong-Lin, Han, Bing
Electrical and magnetic brain waves of seven subjects under three experimental conditions were recorded for the purpose of recognizing which one of seven words was processed. The analysis consisted...
Brain-wave recognition of sentences
Suppes, Patrick, Han, Bing, Lu, Zhong-Lin
Electrical and magnetic brain waves of two subjects were recorded for the purpose of recognizing which one of 12 sentences or seven words auditorily presented was processed. The analysis consisted of...
Fast decay of iconic memory in observers with mild cognitive impairments
Lu, Zhong-Lin, Neuse, James, Madigan, Stephen, Dosher, Barbara Anne
In a previous clinical report, unusually fast decay of iconic memory was obtained from a subject who later developed Alzheimer's disease. By using the partial-report paradigm, iconic memory (a form...
Perceptual learning in clear displays optimizes perceptual expertise: Learning the limiting process
Dosher, Barbara Anne, Lu, Zhong-Lin
Human operators develop expertise in perceptual tasks by practice or perceptual learning. For noisy displays, practice improves performance by learned external-noise filtering. For clear displays,...
Independent perceptual learning in monocular and binocular motion systems
Lu, Zhong-Lin, Chu, Wilson, Dosher, Barbara Anne, Lee, Sophia
Eye-transfer tests, external noise manipulations, and observer models were used to systematically characterize learning mechanisms in judging motion direction of moving objects in visual periphery...
When motion appears stopped: Stereo motion standstill
Tseng, Chia-huei, Gobell, Joetta L., Lu, Zhong-Lin, Sperling, George
Motion standstill is different from the usual perceptual experiences associated with objects in motion. In motion standstill, a pattern that is moving quite rapidly is perceived as being motionless,...
Broad bandwidth of perceptual learning in the visual system of adults with anisometropic amblyopia
Huang, Chang-Bing, Zhou, Yifeng, Lu, Zhong-Lin
Recent studies have demonstrated that training adult amblyopes in simple visual tasks leads to significant improvements of their spatial vision. One critical question is: How much can training with...
Li, Xiangrui, Lu, Zhong-Lin, Tjan, Bosco S., Dosher, Barbara A., Chu, Wilson
Covert attention can lead to improved performance in perceptual tasks. The neural and functional mechanisms of covert attention are still under investigation. Using both rapid event-related and mixed...
The effects of skin tone on race-related amygdala activity: an fMRI investigation
Ronquillo, Jaclyn, Denson, Thomas F., Lickel, Brian, Lu, Zhong-Lin, Nandy, Anirvan, Maddox, Keith B.
Previous work has shown differential amygdala response to African-American faces by Caucasian individuals. Furthermore, behavioral studies have demonstrated the existence of skin tone bias, the...