BY KNOWING THE LAWS OF CLOTHING COMFORT WE CAN ABLE TO DESIGN A PARTICULAR CUSTOMIZED CLOTHES USED FOR PARTICULAR APPLICATION AND THAT IS QUITE BENEFICIAL AS COMFORT POINT OF VIEW
2. FACTORS INFLUENCING THE CLOTHING COMFORT SENSATIONS:-
Psychological factors of the wearer which indirectly affects the clothing comfort sensation.
There are three main factors, which influence clothing sensation , there are-
1. Physical factor
(deal with human-clothing environment system)
2.Psyco-physiological factors of the wearer
3.Psychological filters of the brain .
( clothing comfort is a human psychological perception related with clothing ensemble , which is
an outcome of complex linkage between individual sensory stimuli received by brain , evaluation
and weighing of all these stimuli to formulate subjective perception of overall comfort based on
wear experience)
3. Psychophysics and clothing comfort:
LAWS OF PSYCHOPHYSICS
Psychophysics is about the quantification of the strength of internal sensation , which can be
broadly defined as the quantification of sensory experience
The measurement of strengths of internal sensations has two aspects
1. The assessment of human powers of signal identification and sensory discrimination( good or
bad , soft or hard etc)
2. The calibration of subjectively perceived intensities and other parameters of stimulation( if
good, to what extent !)
4. Weber’s law
Weber proposed that the threshold (i.e the just noticeable difference ) of stimulus (dI) are
proportional to the magnitude of stimulus I. This can be expressed as –
dI/I=K
Where K is a constant indicating the power of human being to detect signals and discriminate
sensations, depends upon the power of human brain
At low magnitude of stimulus , we can perceive the change , if the change , if the temperature
change from 5 to 6 degree Celsius or 5 to 7 degree Celsius , we can clearly differentiate ; its
warmer today.
5. Fechner’s Law
The Fechner’s law , has proposed first relationship between the Physical stimulus (I)
and internal sensation (S) which is a logarithmic relationship.
S = K log I
Where K is a constant determined by the stimulus threshold which represents the lowest
physical value evoking sensation and the differential threshold providing a subjective
unit of sensory intensity
Fechner’s assumption: sensation (S) increases arithmetic steps as the intensity
physical stimulus(I) is increased in logarithium steps.
6. I is the stimulus in the graph, this is the intensity of the stimulus. x axis and y axis it
is the intensity of sensation and if we convert it to a logarithmic scale. So, it is log I and
which is directly proportional to the intensity of sensation, so this is arithmetic change
and S changes arithmetically,
7. Steven’s Powers law (1950s)
S S Stevens developed a method of estimation of the relationship between subjectively
perceived intensity i.e internal intensity (S) and physical stimulus intensity (I)
S=K I^a
Where K is a scale factor and
‘a’ an exponent characteristics of the physical stimulus
9. So, depend on the modality what it type is of, so if it is say heat or cold we will get one a
particular value of if it is electric shock we will get a particular value if it is pressure we
will get. So, he could quantify the value so if you just rearrange this equation. So, log S
equal to a log I plus log k which is constant this in this form we can get
