Direct personal investigation: According to this method, investigator organises personal contact with those from whom the information is to be obtained.
Merits:
The investigator personally collects the information, the data are original and accurate.
The questions can be explained to the informant according to his education standards.
Data obtained through this method are uniform and homogenous.
Demerits:
This method suffers from personal elements and hence conclusions and inferences are likely to be biased.
This method of collecting data is very complex.
This method involves unnecessary wastage of time and money.
