 |
Web
Surveys
|
|
Data Validation
|
A wide range of facilities exist to ensure final data is clean and complete,
such as:
|
| |
• |
Requiring a question to be answered. |
| |
•
|
Ensuring illogical combinations of responses cannot be entered –
for example, ‘None of these’ and another response. |
| |
•
|
Ensuring a certain number of items are checked (for example,
exactly 2 items, at least 2 items, or less than 5 items). |
|
|
 |
| |
•
| Ensuring numeric data is logical (for example, hours worked per week is between 0 and 168). |
| |
•
|
Ensuring numeric data adds to the correct total where relevant
(for example, 'Out of your last ten purchases, how many ...' adds to 10). |
| |
•
|
Relational numeric comparisons – for example, checking the number of children in household is at least one less than total number of people in household. |
|
|
|
|
 |
