In closed form questionnaire, a number of alternative answers are provided at the end of each questions and the task is, the informant has to choose one of them, this is also called “poll-type” or “selective-type” of questionnaire for the informant has to select one among the answers supplied by the investigator himself.
In open-end type questions are not followed by any ready-made answers, the informant has to think of the answer himself and he is free to answer as he likes, the open-end responses are free and spontaneous expressions on the part of the informant who is not limited in his replies to a particular question posed to him. this is called “inventive type” for the respondent has to think of or invent the answer himself.
The respondent may be asked to write a descriptive essay and express his view point, describe his relationships, attitudes, indicate his problems, and report on details and events without restrictions imposed as in the type of closed questions.
