The process of perception explains the manner in which informa-
tion (stimuli) from the environment around us is selected and
organised, to provide meaning for the individual. Perception is the
mental function of giving significance to stimuli such as shapes,
colours, movement, taste, sounds, touch, smells, pain, pressures
and feelings. Perception gives rise to individual behavioural
responses to particular situations.
Despite the fact that a group of people may ‘physically see’ the
same thing, they each have their own version of what is seen –
their perceived view of reality. Consider, for example, the image
(published by W. E. Hill in Puck, 6 November 1915) shown in
Figure 11.2. What do you see? Do you see a young, attractive, well-
dressed woman? Or do you see an older, poor woman? Or can you
now see both? And who can say with certainty that there is just
the one, ‘correct’ answer?
The first stage in the process of perception is selection and attention. Why do we
attend to certain stimuli and not to others? There are two important factors to consider
in this discussion: first, internal factors relating to the state of the individual; second,
the environment and influences external to the individual. The process of perceptual
selection is based, therefore, on both internal and external factors.
Our sensory systems have limits, we are not able to see for ‘miles and miles’ or hear
very low or very high pitched sounds. All our senses have specialist nerves which
respond differentially to the forms of energy which are received. For instance, our eyes
receive and convert light waves into electrical signals which are transmitted to the
visual cortex of the brain and translated into meaning.
Our sensory system is geared to respond to changes in the environment. This has
particular implications for the way in which we perceive the world and it explains why
we are able to ignore the humming of the central heating system, but notice instantly
a telephone ringing. The term used to describe the way in which we disregard the
familiar is ‘habituation’.
As individuals we may differ in terms of our sensory limits or thresholds. Without eye
glasses some people would not be able to read a car’s number plate at the distance
required for safety. People differ not only in their absolute thresholds, but also in their
ability to discriminate between stimuli. For instance, it may not be possible for the
untrained to distinguish between different grades of tea but this would be an everyday
event for the trained tea taster. We are able to learn to discriminate and are able to
train our senses to recognise small differences between stimuli. It is also possible for us
to adapt to unnatural environments and learn to cope.
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We may also differ in terms of the amount of sensory information we need to reach
our own comfortable equilibrium. Some individuals would find loud music at a party
or gig uncomfortable and unpleasant, whereas for others the intensity of the music is
part of the total enjoyment. Likewise, if we are deprived of sensory information for too
long this can lead to feelings of discomfort and fatigue. Indeed, research has shown
CHAPTER 11 THE PROCESS OF PERCEPTION
Internal and
external
factors
INTERNAL FACTORS
Figure 11.2
MEANING TO THE INDIVIDUAL
Sensory limits
or thresholds
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