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Transcript of Color's perception
EATING AND SHOPPING
BY THE COLORS
A COMENIUS PROJECT
BY THE STUDENTS OF PSYCHOLOGY
COLOR'S PERCEPTION AND ITS INFLUENCE ON EATING
HOW ARE COLORS PERCIBED?
PHYSIOLOGICAL FACTORS I
Black color absorbs all colors (does not reflect any light).
We can see black objects because they are not totally black. So they usually reflect some light.
PHYSIOLOGICAL FACTORS II
PHYSIOLOGICAL FACTORS III
OPTICAL ILLUSIONS RELATED TO COLOR
Hypothesis: Nourishment's color affects flavor perception.
FIGURES AND CONCLUSIONS
AL-BASIT HIGH SCHOOL
The same color can create different sensations to different subjects, depending of subjective factors.
Fashion, learning, religious believes, customs..., have an influence on the perception of color...
Rods cells: activated in darkness, let distinguish black, white and gray colors.
Cones cells: work in bright places, and make possible the vision of colors.
It is a series of cards containing colored circle dots at random sizes.
These points form a number that people with normal sight can see, but a colorblind can not.
Age, personality, physical state, attention, personal motivations or preferences..., are individual factors.
If a kid witnessed a bloody accident, he might reject red color objects.
Physic considers light as a wave.
Depending of the wavelength, we see a color or another.
Object colors depends on the kind of radiation that it reflects.
Someone can feel attached to some colors because they belong to his favorite football team, or his country’s flag.
There are three types of cones:
. Objects that reflect light excite more than two types of cones. That information goes to the brain, whose process it at the occipital lobe.
The color of the horses looks different, but it is the same. Explanation: the shading off background, in contrast with color of the horses, creates the illusion.
Types of cones
If we look at the blue spot, it will gradually disappear. Explanation: cone cell saturation. A post-imagen can appear also.
Both central circles are exactly the same (a blue one), although they look different. Explanation: changing the background we create this optical illusion.
is conceived on different ways in different geographical areas:
East: it is the luck color, used by brides.
West: it represents emotion, danger, love, passion, but also violence and sexuality.
China: it symbolizes good luck, celebration.
South Africa: it is the color of mourning.
If we look at the center of the image, the surrounding areas will decrease their size and they will eventually disappear. Explanation: cone cell saturation.
West: It is color for brides, angels and peace. It symbolizes innocence, purity and novelty.
East: In China it is the color of mourning. It means purity, but also bad luck. In Japan, white symbolizes death.
West: It symbolizes illness, cowardice and contempt, but also friendship.
East: It is a symbol of power and strength.
The highest level of a stimulus that a sense can detect.
Our maximun optical threshold is, aproximately, 750 nm (red color).
It is the lowest level of a stimulus that a sense can detect.
Under 400 nm (blue color) human eyes do not receive information.
Someones think that under 400 nm eyes do not receive datas, but mind does (Subliminal perception).
Eyes receive luminous energy (light -electromagnetic waves).
It crosses cornea, pupil and lens until arriving to the retina.
Cone cells and rod cells, placed in the retina, translate electromagnetic waves into nerve impulses.
Through optic nerve, nerve impulse travels from eyes to the brain.
The light that eyes receive does not come directly from the sun, but from the reflection on objects.
Light intensity and tone are determinant in our perception, although it is only an optical illusion due to our retina physiology.
Our perception of a color changes depending on the color placed beside the former. It is the chromatic contrast. Example:
Genetic defect that makes difficult to distinguish colors.
There are several types of color blindness, but difficulty in distinguishing red and green is the most frecuent.
Colorblindness affects more male than female.
Control group: ten subjects tried five different types of food which has been altered in its shape but not in its color.
First experimental group: ten subjects tried five different types of food which has been altered in shape and color.
Second experimental group: ten blindfolded subjects tried five different types of food which has been altered in its shape but not in its color.
All of them had to guess what they were tasting.
Added to this, control group and first experimental group were asked about what color of food (colored or not colored) they like the most and which they hate the most.
Control group: 6 4 9 1 7 3 10 0 10 0
Banana Red Pepper Stuffed Olives Ketchup Coconut
R - W R - W R - W R - W R - W
First exp. group: 2 8 1 9 5 5 7 3 8 2
2nd. exp. group: 5 5 4 6 1 9 7 3 9 1
First experimental group made more mistakes than the others, blindfolded group includeed. CONCLUSION: If we change the color of the food, the brain is totally confused.
Black or ochre food do not appeal at all. However, bright colored food is very atractive, in spite of its non natural tone.
Children remember colors better than verbal directions. Combining lesson materials with colors can help children to memorize information.
In a culture in which education is usually the same for all children, common patterns of perception of color appears (for instance, green for correct answers , red for failures).
Color's perception depends on:
Reflected light wavelenght.
Helen Cleidy Álvarez Escobar
Abel Cajo Martínez
Macarena Capdevila Canales
Luz Adriana Dávila Losada
Sandra García Martínez
María Elena Gómez Collado
José Pedro González Martínez
José López Martínez
Jesús Martínez Mena
David Martínez Sánchez
Raquel Mora Navarro
Gabriel Navalón Soriano
José Manuel Rodenas Morcillo
Pablo Ródenas Romero
Rocío Sáez Caballero
Cristina Santiago Calleja
Elena Nieto Mateos,
Philosophy and Psychology teacher