Assertiveness is the quality of being self-assured and confident without being aggressive to defend a right point of view or a relevant statement. In the field of psychology and psychotherapy, it is a skill that can be learned and a mode of communication. Dorland's Medical Dictionary defines assertiveness as:
Assertiveness is a communication skill that can be taught and the skills of assertive communication effectively learned.
Assertiveness is a method of critical thinking, where an individual speaks up in defense of their views or in light of erroneous information. Additionally, assertive people are capable of being outspoken and analyze information and point out areas of information lacking substance, details or evidence. Thus, it can be noted that assertiveness supports creative thinking and effective communication.
However, during the second half of the 20th century, assertiveness was increasingly singled out as a behavioral skill taught by many personal development experts, behavior therapists, and cognitive behavioral therapists. But now assertiveness is often linked to self-esteem. The term and concept was popularized to the general public by books such as Your Perfect Right: A Guide to Assertive Behavior (1970) by Robert Eating.