1) Dogs are not completely color blind but have dichromatic vision, meaning they see a more limited color spectrum than humans. 2) An experiment was conducted where dogs were trained to retrieve a treat from one of two jars covered in similar or distinctly different colored construction paper in black and white photos. 3) The results showed that dogs could distinguish the correct jar around 72-84% of the time, supporting the hypothesis that dogs can see some shades of color, despite their more limited color vision compared to humans.

1. ©Group 9 {II- St. Bernard}
Paner
Diaz
Sablan
De La Serna
Ligan

3.  They see grey colors.
 They do not recognize the
right colors around us.
 They have a sharp sight
for night vision.
 They are color blind.
 They see colors.
 They get stuck and still
when they see bright light.

4. Dogs are not color blind in the sense that they see more than
just black, white and gray. However, the color range they
perceive is limited compared to the spectrum we see.

5.  Color blind doesn’t always
mean not seeing any colors
but instead seeing only
limited ones, unlike what we
humans observe, because
of that any kind of color
vision, deficiency is called
color blindness. So, dogs
are color blind because of
their dichromatic color
vision.

6. 1. Take black and white pictures of an
assortment of colored construction
paper to determine which colors
appear to have similar and dissimilar
degrees of brightness and shade.
2. Cover two jars with different colored
construction paper that share a similar
shade when photographed
with black and white film. Cover the
third jar with another color whose
photograph shade is distinctly
different from the other two jars.

7. Methods:
3. The dog will be trained to go
to one of the similar shaded jars
from the differently shaded jar.
When the
dog chooses the correct jar
reward it with a treat.

8. 4. Replace the different shaded jar with the similar shaded
jar. The dog needs color vision to distinguish
between the two jars, since with complete color blindness
the two colors would appear to be the same
shade.
5. Switch positions of the jars and test the dog 25 times
each trial. If the dog is correct, reward him w/ a treat. Chart
the number of correct and incorrect responses.

10. Conclusions/Discussion:
{Max and Sam are two dogs we could have used in our experiment.}
In the first part of our experiment, we trained Max (first dog) and Sam
(second dog) to recognize the yellow jar as a treat jar. The next step
tested if Max and Sam could pick the yellow jar from the red jar. In the first
trials, Sam chose the correct yellow jar 52% of the time while Max chose
the correct yellow jar 84% of the trials.
Sam was retested several days later and chose the yellow jar correctly
76% of the trials. The second half of tested if Max and Sam could
distinguish between a yellow jar and a violet jar. Even though yellow and
violet appear to be similar shades in black and white photos, the dogs
were able to choose the correct yellow jar 72% of the trials.
This data supports our hypothesis,
that dogs can see some shades of color.

12. Now that we have proved this a bit,
we will explain how it works…
The anatomy of seeing and the role of
the retina describes a structure at the
innermost layer of the eye that senses
light and sends visual information to
the brain.
2 types of photoreceptor cells in the
retina -- rods and cones -- respond to
light and transmit electric impulses to
the optic nerve through a series of
chemical reactions.
Rods process visual information in dim
light and are sensitive motion
detectors, while cones handle color
and detail. The human retina contains
approximately 100 million rods and 7
million cones.

15. Credits:
Elianna A. Paner
Editor-in-Chief, Research, Pictures
and Experiment/Results
Claire Diaz
Research, Information, Resources
Ryan Sablan
Gabriel Ligan
Vince De La Serna
Research , Data, Compilation and
Reporting
©Investigatory Project
II- St. Bernard, 4th Quarter
Group 9- Biology
Ms. Marivic Torres