Group interview
In a survey method, people may give inaccurate information because of memory lapses or they may not what to let the researcher know and what to let the researcher known and what they really believe about a particular issue.
All the above
All of the above
Marital status
In a power test, the items are generally arranged in an increasing order of difficulty.
A positive correlation indicates that as the value of one variable increases, the value of the other variable decreases.
Physiological information
None of the above