1.1 Explain The Functional Limitations Of Sense Organs Case Study
Ch. 5 – Sensory, Attentional and Perceptual Processes
1 Explain the functional limitations of sense organs.
Ans. Our sense organs function with certain limitations. E.g. our eyes cannot see things which are very bright or dim. Our senses function within a limited range of stimulation.
In order to be noticed by the sensory receptor, a stimulus needs to be of a suitable intensity to be noticed by the sensory receptor, i.e. it has to carry a minimum value or weight. The minimum value of a stimulus required to activate a given sensory system is called absolute threshold or absolute limen. E.g. the minimum number of sugar granules required to say that water in a glass is sweet will be the AL of sweetness. The AL varies according to individuals …show more content…
Novel and moderately complex stimuli easily get into our focus.
Human photographs are easily paid attention to as compared to photographs of inanimate objects.
Sudden and intense stimuli have an immediate capacity to draw attention.
2 Internal factors:
Motivational factor: It relates to our biological and social needs. E.g. When we are hungry, we notice even a faint smell of food.
Cognitive factors: It includes factors like interest, attitude and preparatory set.
Difference between selective attention and sustained attention:
1 Selective attention is concerned mainly with the selection of a limited number of stimuli or objects from a large number of stimuli. Sustained attention is concerned with concentration.
2 Selective attention refers to our limitation of dealing with only a few stimuli at a given moment of time. Sustained attention refers to our ability to maintain attention on an object or event for longer durations.
3 The determinants of selective attention are external factors like size, intensity, motion, novelty, complexity, intensity, etc., internal factors like motivation and cognition. The determinants of sustained attention are sensory modality, clarity of stimuli, temporal uncertainty and spatial
1 Explain the functional limitations of sense organs.
Ans. Our sense organs function with certain limitations. E.g. our eyes cannot see things which are very bright or dim. Our senses function within a limited range of stimulation.
In order to be noticed by the sensory receptor, a stimulus needs to be of a suitable intensity to be noticed by the sensory receptor, i.e. it has to carry a minimum value or weight. The minimum value of a stimulus required to activate a given sensory system is called absolute threshold or absolute limen. E.g. the minimum number of sugar granules required to say that water in a glass is sweet will be the AL of sweetness. The AL varies according to individuals …show more content…
Novel and moderately complex stimuli easily get into our focus.
Human photographs are easily paid attention to as compared to photographs of inanimate objects.
Sudden and intense stimuli have an immediate capacity to draw attention.
2 Internal factors:
Motivational factor: It relates to our biological and social needs. E.g. When we are hungry, we notice even a faint smell of food.
Cognitive factors: It includes factors like interest, attitude and preparatory set.
Difference between selective attention and sustained attention:
1 Selective attention is concerned mainly with the selection of a limited number of stimuli or objects from a large number of stimuli. Sustained attention is concerned with concentration.
2 Selective attention refers to our limitation of dealing with only a few stimuli at a given moment of time. Sustained attention refers to our ability to maintain attention on an object or event for longer durations.
3 The determinants of selective attention are external factors like size, intensity, motion, novelty, complexity, intensity, etc., internal factors like motivation and cognition. The determinants of sustained attention are sensory modality, clarity of stimuli, temporal uncertainty and spatial