The procedure of assigning numbers to various degrees of opinion, attitude and other concepts, is called as

Data collection is the process of acquiring and analysing information on relevant variables in a planned methodical way. 

Key Points

• There are different methods of Data Collection such as Surveys, Transactional Tracking, Interviews and Focus Groups, Observation, Online Tracking etc. 
• Scaling is a method of placing respondents in a continuous, gradual shift in the pre-assigned values, symbols, or numbers based on the characteristics of an object. 
• On the basis of primary scaling techniques, it can be divided into Nominal scale, Ordinal scale, Interval scale, and Ratio scale. 

Thus, the procedure of assigning numbers to various degrees of opinion, attitude and other concepts, is called Scaling. 

Additional Information

• Variance: The statistical assessment of the difference between numbers in a data set. 
• Regression: Regression is the effect of a dependent variable on one or more independent variables. 
• Concordance: It is a correlation coefficient that measures the agreement between two variables.