Eight techniques are used-sometimes all of them in the same study-to collect information (Neustadt and Fineberg, 1978; Yin, 1989).
Sometimes, all eight techniques are used in the same study.
There are only three techniques for information collection.
The man is sitting.
A man is wearing a yellow shirt.
We see no problem with the bill.
The boy and girl are looking opposite ways of each other.
The man in the suit sits in front of a door.
A women graduated.