Perception and illusions
Fedorenko Anastasiia. PS-13
WE SEE THINGS AS WE ARE
(selecting, organizing, interpreting)
Factors of Perception:
Subjective (Fitness, Interest, Knowledge, Mental Capacity)
Objective (physical environment stimuli))
Social (Social value, Attitudes, Stereotype, Suggestion)
the things are situated close to each other
form a figure or a pattern
are perceived as a whole figure
may be in space and time
words set nearer to each other form an organization
tendency to group similar elements
objects similar in shape are classified in a group
all the parts of a figure in
A symmetrical figure makes a
perceptual organization and
perceptual tendency to fill the
gaps or closure fills the gaps
to help us to perceive it as a
whole complete form
grouping in the perceptual
organization is classified in
two groups because of their
all the stimuli are include to
form a pattern.
position in space with time.
perception of the actual
movement of objects in the
movement perceived in the absence
of physical movement of an image
across the retina.
dimensional space and to accurately judge
objects in a consistent manner despite the changing
sensations that are received by our senses.
certain shape, we tend to perceive it as the same shape,
regardless of the viewing angle.
constant in perception when we know their true color.
Visual objects also appear constant in their degree of
whiteness, grayness and blackness.
it is something that is false or not real but that seems to
be true or real.
Causes of Illusion:
Habit & Familiarity.
Expectancy & Mental Set.
Momentary State of Mind or Mood.
Incomplete analysis of the collective impression.
Arrangement of stimuli.
When a stationary stimulus is
perceive as moving, it is named as
illusion of motion or movement.
The Illusion Of forms.
Form perception is attained in relation
to the figure and ground according to
the law of perception Organization. As
the figure is smaller then the ground
according to perceptual.
The illusion of distance.
The illusion of distance occurs when
the parallel lines seem to bend in
spiral have become the cause of this illusion. The
illusion is also known as the false spiral, or by its
original name, the twisted cord illusion.
other instead of looking straight. The reason of
this Illusion is the smaller diagonal lines cutting
the parallel line.
straight line separately, a large straight line seem
cutting the parallel line instead of two partial line.
larger and farther object is perceived smaller
but in the moon illusion, moon is perceived
larger on horizon where the earth and sky seem