Chapter 7 Measurement Scaling, Reliability, Validity

Measurement: Scaling, Measurement: Reliability, Validity CHAPTER 7

1

Scale 

Is a tl r mec!anism by "!ic! indi#iduals are distinguis!ed as t !" t!ey di$er %rm ne ant!er n t!e #ariables % interest t ur study&

'

Scale 

Is a tl r mec!anism by "!ic! indi#iduals are distinguis!ed as t !" t!ey di$er %rm ne ant!er n t!e #ariables % interest t ur study&

'

scales 

1& *& '& &

 T!ere are are four basic ty(es % scales: )minal Scale +rdinal Scale Inter#al Scale Rati Scale

'

)minal Scale 

A nominal scale is ne t!at all"s t!e researc!er t assign sub-ects t certain categries r gru(s&



.!at is yur de(artment/ + Mar0eting + Maintenance + inance + Prductin + Ser#icing + Persnnel + Sales + Public Relatins + Accunting



.!at is yur gender/ + Male + emale 7

)minal Scale 

 T!e information t!at can be generated %rm nominal scaling is t calculate t!e (ercentage 2r %re3uency4 % males and %emales in ur sam(le % res(ndents&

5

E6am(le 1 



Nominally scale t!e natinality % indi#iduals in a gru( % turists t a cuntry during a certain year& .e culd nminally scale t!is #ariable in t!e %ll"ing mutually exclusive and collectively exhaustive categories& American a(anese Russian Malaysian C!inese 8erman Arabian +t!er

9

E6am(le 1 

)te t!at e#ery res(ndent !as t t int ne % t!e ab#e categries and t!at t!e scale "ill all" cm(utatin % t!e numbers and percentages % res(ndents t!at t int t!em&

7

+rdinal Scale 

Ordinal scale: nt nly categri;es #ariables in suc! a "ay as t dente di$erences amng #arius categries, it als ran0