Some factors in brightness discrimination.

1939 ◽  
Vol 46 (4) ◽  
pp. 337-358 ◽  
Author(s):  
S. Howard Bartley
Keyword(s):  
Brightness Discrimination

The effect of intrahippocampally applied anisomycin on the retention of brightness discrimination in rats

1980 ◽  
Vol 29 (3) ◽  
pp. 281-288 ◽  
Author(s):  
Gisela Grecksch ◽  
Tilmann Ott ◽  
Hansjürgen Matthies
Keyword(s):  
Brightness Discrimination

Habit strength as a function of drive in a brightness discrimination problem.

1956 ◽  
Vol 52 (1) ◽  
pp. 58-64 ◽  
Author(s):  
Eugene Eisman ◽  
Adele Asimow ◽  
Irving Maltzman
Keyword(s):  
Discrimination Problem ◽  
Brightness Discrimination ◽  
Habit Strength

scholarly journals Polarization-based brightness discrimination in the foraging butterfly, Papilio xuthus

2011 ◽  
Vol 366 (1565) ◽  
pp. 688-696 ◽  
Author(s):  
Michiyo Kinoshita ◽  
Kei Yamazato ◽  
Kentaro Arikawa
Keyword(s):  
Light Intensity ◽  
Animal Species ◽  
Brightness Discrimination ◽  
Egg Laying ◽  
Polarization Vision ◽  
Discrimination Test ◽  
Spectral Content ◽  
Papilio Xuthus ◽  
Choice Tests ◽  
Vector Orientation

The human eye is insensitive to the angular direction of the light e-vector, but several animal species have the ability to discriminate differently polarized lights. How the polarization is detected is often unclear, however. Egg-laying Papilio butterflies have been shown to see false colours when presented with differently polarized lights. Here we asked whether this also holds in foraging butterflies. After training individuals to feed on nectar in front of an unpolarized spectral light, we carried out three dual-choice tests, where the discrimination of (i) the spectral content, (ii) the light intensity, and (iii) the e-vector orientation were investigated. In the first test, the butterflies selected the trained spectrum irrespective of its intensity, and in the second test they chose the light with the higher intensity. The result of the e-vector discrimination test was very similar to that of the second test, suggesting that foraging butterflies discriminate differently polarized lights as differing in brightness rather than as differing in colour. Papilio butterflies are clearly able to use at least two modes of polarization vision depending on the behavioural context.

Brightness Discrimination Learning under Conditions of Simultaneous and Successive Presentation of Stimuli with Punishment

1963 ◽  
Vol 13 (1) ◽  
pp. 127-132 ◽  
Author(s):  
Sheldon J. Lachman ◽  
Donald H. Taylor
Keyword(s):  
Discrimination Learning ◽  
Electric Shock ◽  
Brightness Discrimination ◽  
Learning Criterion ◽  
Gestalt Theory ◽  
Successive Presentation ◽  
Parallel Group

Under relational conditions with electric shock punishment for incorrect responses, all 9 rats learned to choose the dimmer of two stimuli; no Ss in a parallel group of rats ( N = 6) given equivalent training under absolute conditions reached the learning criterion. Results are interpreted as supporting the Gestalt theory of discrimination learning rather than the theory of Spence.

scholarly journals Color and brightness discrimination of white LEDs

2002 ◽  
Author(s):  
Patricia Rizzo ◽  
Andrew Bierman ◽  
Mark S. Rea
Keyword(s):  
Brightness Discrimination ◽  
White Leds
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