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Descriptive: it's a problem of status and describe phenomena.
Comparative: which is the problem to compare two or more phenomena.
Corelative: which is it seeks to connect between two phenomena.
Associative Problem: is a problem that has two or more variables that are interconnect.
A person's experience
Literature
Reading, particularly reading that includes information on study findings.
Seminars, group discussions, and other scientific gatherings are also available.
Statement of authority.
A cursory observation.
Personal experience.
Feeling of intuition.
Self-searching, that is, looking for problems based on one's own experiences and expertise.
Other people, for example, are looking for solutions based on scholars' and practitioners' experience and knowledge.
Research journals, specifically, prospective researchers can find many issues specified in published articles.
The problem selected must have research value.
The problem selected must have poise.
The problem of choice must match the qualifications of the researcher.
A scientific problem should not be an ethical or moral question.
Avoid problems that are methodologies.
Issues should be specific.