A photo-electric nucleus counter with size discrimination

1955 ◽  
Vol 31 (1) ◽  
pp. 60-65 ◽  
Author(s):  
T. A. Rich
Keyword(s):  
Size Discrimination ◽  
Nucleus Counter

Microfluidics-Integrated Microwave Sensors for Single Cells Size Discrimination

2020 ◽  
Author(s):  
Arda Secme ◽  
Hadi Sedaghat Pisheh ◽  
H. Dilara Uslu ◽  
Ozge Akbulut ◽  
R. Tufan Erdogan ◽  
...  
Keyword(s):  
Single Cells ◽  
Size Discrimination ◽  
Microwave Sensors

Stereoscopic Size Discrimination in Disturbed and Non-Disturbed Children

1973 ◽  
Vol 36 (1) ◽  
pp. 323-328 ◽  
Author(s):  
Thomas E. Webb
Keyword(s):  
Discrimination Task ◽  
Response Variability ◽  
Size Discrimination ◽  
Perceptual Coding ◽  
Normal Controls

10 children with withdrawn personality disturbances showed significantly greater response variability on a stereoscopic size-discrimination task than did children with very aggressive conduct disturbances or normal controls. It is proposed that mechanisms associated with the reliable initiation and maintenance of cognition are more salient than those involving primary sensory/perceptual coding.

Nonsymbolic-Magnitude Deficit in Adults With Developmental Dyscalculia: Evidence of Impaired Size Discrimination but Intact Size Constancy

2021 ◽  
pp. 095679762199520
Author(s):  
Nirit Fooks ◽  
Bat-Sheva Hadad ◽  
Orly Rubinsten
Keyword(s):  
Size Constancy ◽  
Size Discrimination ◽  
Depth Cues ◽  
Developmental Dyscalculia ◽  
Core Deficit ◽  
Depth Ordering

Although researchers have debated whether a core deficit of nonsymbolic representation of magnitude underlies developmental dyscalculia (DD), research has mostly focused on numerosity processing. We probed the possibility of a general magnitude deficit in individuals with DD and asked whether sensitivity to size varied in contexts of depth ordering and size constancy. We measured full psychometric functions in size-discrimination tasks in 12 participants with DD and 13 control participants. Results showed that although people with DD exhibited veridical perceived magnitude, their sensitivity to size was clearly impaired. In contrast, when objects were embedded in depth cues allowing size-constancy computations, participants with DD demonstrated typical sensitivity to size. These results demonstrate a deficit in the perceptual resolutions of magnitude in DD. At the same time, the finding of an intact size constancy suggests that when magnitude perception is facilitated by implicit mandatory computations of size constancy, this deficit is no longer evident.

Routes to Object Constancy: Implications from Neurological Impairments of Object Constancy

1984 ◽  
Vol 36 (3) ◽  
pp. 385-415 ◽  
Author(s):  
Glyn W. Humphreys ◽  
M. Jane Riddoch
Keyword(s):  
Distinctive Feature ◽  
Principal Axis ◽  
Target Object ◽  
Matching Task ◽  
Size Discrimination ◽  
Form Discrimination ◽  
Object Constancy ◽  
Distinctive Features ◽  
Global Properties ◽  
Feature Information

Previous studies have established the existence of neurological impairments of object constancy: the ability to recognize that an object has the same structure across changes in its retinal projection. Five case studies of brain-damaged patients with deficits in achieving object constancy are reported. To test object constancy, patients discriminated two photographs of a target object, taken from different views, from a photograph of a visually similar distractor object. Four patients showed impaired matching only when the principal axis of the target object in one photograph was foreshortened. The fifth patient showed impaired matching only when the saliency of the target object's primary distinctive feature was reduced. This double dissociation suggests that normally there may be two independent means of achieving object constancy: one by processing an object's local distinctive features, the other by describing the object's structure relative to the frame of its principal axis. Neurological damage can selectively impair either process. Further, this impairment can be independent of deficits in processing visual form, since two patients with a selective deficit in the foreshortened matching task showed relatively normal form discrimination. The patient dependent on local distinctive feature information showed a deficit in size discrimination. It is suggested that this patient fails to utilize global properties of form. This failure may underlie both his impairment in achieving object constancy and in processing certain dimensions of form.

scholarly journals Cell Size Discrimination Based on the Measurement of the Equilibrium Velocity in Rectangular Microchannels

Micromachines ◽  
2015 ◽  
Vol 6 (5) ◽  
pp. 634-647 ◽  
Author(s):  
Lisa Schott ◽  
Christian Sommer ◽  
Joern Wittek ◽  
Khaliun Myagmar ◽  
Thomas Walther ◽  
...  
Keyword(s):  
Cell Size ◽  
Size Discrimination ◽  
Rectangular Microchannels
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