We can define perception and factors affecting perception as perception being a cognitive process that is used to understand and interpret information that we get from our senses, and certain factors affect perception, such as emotion, motivation, culture, and expectations. Have you ever wondered why you walk into a room and seemingly miss seeing certain objects? Or forget seeing something at all in the room? Have you ever wondered why, when you're hungry, food looks so much more appetising?
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Jetzt kostenlos anmeldenWe can define perception and factors affecting perception as perception being a cognitive process that is used to understand and interpret information that we get from our senses, and certain factors affect perception, such as emotion, motivation, culture, and expectations. Have you ever wondered why you walk into a room and seemingly miss seeing certain objects? Or forget seeing something at all in the room? Have you ever wondered why, when you're hungry, food looks so much more appetising?
Humans have limited capacity for information that they can pay attention to. Psychological factors affect perception, so perception has a biased nature. When perceiving stimuli, people will focus on certain objects whilst ignoring others, known as perceptual sets.
Perceptual sets are the tendency of humans to notice and ignore certain aspects of a stimulus, determined by a state of readiness.
This is a type of perceptual bias.
Different factors can affect our perception of things, freepik.com/pch.vector
How humans interpret stimuli/phenomena is based on factors such as:
As we discussed above, perception and factors affecting perception can be defined as:
Perception is a cognitive process that is used to understand and interpret information that we get from our senses, and certain factors affect perception, such as emotion, motivation, culture, and expectations.
Various stimulus factors can affect perception. These include:
These are also known as external factors affecting perception.
Psychological factors that have been found to affect perception are:
Motivation
Going to the shop when hungry can lead you to buy more food than you normally would.
Gilchrist and Nesberg (1952) found supporting evidence of motivation affecting perception in their study, detailed below.
Emotion
Selye's GAS (General Adaptation Syndrome) model suggests that senses are heightened when stressed due to a perceived threat. The body's response is to become hypervigilant (increased perception) so that the person can deal with the threat.
People in sad moods are susceptible to visual illusions.
Expectation
When someone thinks of an apple, they might expect it to be red or green. However, apples can also be yellow or white.
Bruner and Minturn (1995) found supporting evidence of expectations affecting perception.
Culture
Research evidence has found that people living in Eastern (collectivist) societies tend to perceive things holistically. Such as seeing objects about others. Whereas Western (individualistic) society tends to perceive things analytically. For example, people may interpret things as individual components.
These psychological factors are also occasionally referred to as internal factors that affect perception.
Gilchrist and Nesberg (1952) and Bruner and Minturn (1995) carried out research to identify if various factors (motivation and expectations) affected perception.
Gilchrist and Nesberg (1952) conducted research to see if hunger affected how people perceived food.
Procedure
The study involved 26 students who volunteered to take part in the study, and the sample was split into two groups
Half were not allowed to eat for 20 hours before the start of the experiment, the experimental group
The other half ate a normal amount of food before the start of the group, the control group
Both groups were shown an image for 15 seconds, and the screen would turn off. Additionally, participants were told that the same picture would be shown again for 15 seconds. However, it would look differently; they were told that the brightness had changed
Participants were told to adjust the brightness of the second image to match the first image that was presented to them
This task was tested using a time-interval schedule: after lunchtime, after 6 hours and 20 hours
All the images shown were pictures of food
Hungry people may perceive food differently than others, flaticon.com/premium-icon
From the results of the Gilchrist and Nesberg (1952) experiment, it can be concluded that motivation (in this case, hunger) can affect how we perception.
A strength of the study is that the study can be considered ecologically valid to a certain extent, as the experimental group did not actually eat for 20 hours. Therefore, participants actually would have been hungry. It is also easily replicated.
A weakness of the study is that it was carried out on a non-representative sample (only 20 students). Therefore, the results cannot be generalised to the wider population.
Bruner and Minturn (1995) carried out research to investigate if expectations affected perception.
In this study, 24 students were recruited in the experiment. Participants were required to complete a recognition task (of numbers and letters). Letters or numbers were quickly flashed on a screen
Throughout the trials an ambiguous figure was shown, this means that it could have easily been interpreted as a 'B' or '13'
The participants were split into two groups:Bruner and Minturn (1955) found that:
From the results of Bruner and Minturn's (1995) experiment, it can be concluded that expectations affect how we perceive/interpret stimuli.
From the results of the Gilchrist and Nesberg (1952) experiment, it can be concluded that motivation (in this case, hunger) can affect perception.
Research needs to be replicable so that other researchers can do the exact same study to see if they get the same results. If similar results are found, then the experiment can be considered reliable.
Examples of three main factors that affect perception are:
Perception is information that is directed to our brain for processing from our senses. Examples of three types of perception are:
The four stages of the perception process are:
Barriers to perception are potential factors that may affect the accuracy of our perception. Examples of these are:
Some features of perception are:
What are perceptual sets?
Perceptual sets is the tendency of humans to notice and ignore certain aspects of a stimulus.
What type of factors are intensity, changes, magnitude and repetition called?
Stimulus factors
What type of factors are culture, motivation, emotion and expectation called?
Psychological factors
Who concluded that hunger can affect how objects are perceived?
Gilchrist and Neberg (1952)
Who concluded that expectations can affect how objects are perceived?
Bruner and Minturn (1995)
What was the procedure used in the Bruner and Minturn (1995) perceptual set experiment?
The procedure of the Bruner and Minturn (1995) experiment was:
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