Ans: Validity is the degree to which what the researcher is trying to measure is actually
measured, such as the extent to which a question or series of questions in a
questionnaire actually measure a concept. Face Validity is the degree to which a
measure seems to measure what it is supposed to measure. An example would be
as follows:
A question asking college students to respond to an age category question when
the target market is defined as traditional college age students.
Question: Please indicate your age by marketing the appropriate blank below:
_____0-18 _____19-34 _____35-54 ____55 and over
The categories above would not be appropriate for traditional college ages
students and therefore would not adequately measure a population consisting of
college students. A better scale would be as follows:
_____0-18 _____19-21 _____22-25 ____26 and over
Content validity has to do with how well the content of the questions represents
the concept being measured. An example would be for a restaurant customer
satisfaction study: Please indicate your level of satisfaction with XYZ restaurant
for each of the following using the following scale:
Very Somewhat Somewhat Very
Dissatisfied Dissatisfied Satisfied Satisfied
_____ _____ _____ _____
1 2 3 4
Location ____ Cleanliness____ Parking____ Service____
The above 4 attributes are certainly important, but do not adequately measure the
concept of satisfaction for a restaurant, thereby not achieving content validity for
satisfaction construct. One obvious omission in the above list is food quality.
Price would be another important omitted variable.
Difficulty: Hard
Response: See pages 289-290
Ref: Step Six: Evaluate the Reliability and Validity of the Measurement
Learning Objective 10.4: To explore the concepts of validity and reliability.