3 Components of Vulnerability Index
The following components were selected for composite index, after consulting the
literature and experts in the field.
• Social vulnerability (social participation, access to common facilities),
• Infrastructure development (roads, health care, common facilities),
• Climate (rainfall, temperature, humidity),
• Agriculture (crops, pattern of cropping),
• Livestock,
• Transportation.
4 Development of Vulnerability Index
There were three major steps as described in detail below:
(a) Determination of scale values
(b) Selection of items/indicators of components of vulnerability index
(c) Computing the composite index of vulnerability.
4.1 Normalized Rank Method by Guilford (1954)
for Determining Scale Values
• Different components of VI were ranked by a group of judges according to their
perceived significance in determining the vulnerability to climate change.
• Rankings were obtained from 36 judges who were experts in the fields of social
science and climate change research.
• The rankings were then tabulated and a frequency distribution denoted by ‘f ji ’
was worked out for each component.
• For different numbers of stimuli ranked ‘n’ corresponding ‘c’ values were made
available from the statistical table.
• Then ‘f ji ’ multiplied by the corresponding ‘c’ value and summated over all the
ranks gave a total score ‘
P
f ji c i ’ for each component, which was further divided
by the total number of judges and the consequent value ‘R i ’ was subjected to
linear transformation to arrive the scale value ‘R c ’ using the formula
R c = 2.357R j − 7.01 (Table 1).
432
G. Letha Devi et al.
The following components were selected for composite index, after consulting the
literature and experts in the field.
• Social vulnerability (social participation, access to common facilities),
• Infrastructure development (roads, health care, common facilities),
• Climate (rainfall, temperature, humidity),
• Agriculture (crops, pattern of cropping),
• Livestock,
• Transportation.
4 Development of Vulnerability Index
There were three major steps as described in detail below:
(a) Determination of scale values
(b) Selection of items/indicators of components of vulnerability index
(c) Computing the composite index of vulnerability.
4.1 Normalized Rank Method by Guilford (1954)
for Determining Scale Values
• Different components of VI were ranked by a group of judges according to their
perceived significance in determining the vulnerability to climate change.
• Rankings were obtained from 36 judges who were experts in the fields of social
science and climate change research.
• The rankings were then tabulated and a frequency distribution denoted by ‘f ji ’
was worked out for each component.
• For different numbers of stimuli ranked ‘n’ corresponding ‘c’ values were made
available from the statistical table.
• Then ‘f ji ’ multiplied by the corresponding ‘c’ value and summated over all the
ranks gave a total score ‘
P
f ji c i ’ for each component, which was further divided
by the total number of judges and the consequent value ‘R i ’ was subjected to
linear transformation to arrive the scale value ‘R c ’ using the formula
R c = 2.357R j − 7.01 (Table 1).
432
G. Letha Devi et al.