In my previous blog post, I noted that reliability and validity are two essential properties of psychological measurement. Measures of intelligence, personality, vocational interests, and so forth ...

Validity is a criterion for the quality of a scientific analysis and its findings. An analysis is valid when it measures what it is supposed to measure, i.e. if the ascertained data truly answer the ...

Routines in a data entry routine that test the input for correct and reasonable conditions, such as account numbers falling within a range, numeric data being all digits, dates having a valid month, ...