The most basic signs of a good or bad psychometric instrument are reliability and validity.
Reliability refers to the consistency, stability, and reliability of the test results, and is generally expressed in terms of internal consistency to indicate the level of reliability of the test. Validity is validity, it refers to the degree to which the measurement tool or means can accurately measure the things that need to be measured. Reliability and validity are the two most basic signs of a good or bad measurement tool.
According to the popular custom in the psychological application equipment industry, the psychological assessment equipment is the psychological assessment system or psychological assessment software, also known as the psychological measurement tool, which is a kind of psychological aid for the counselor to test the different dimensions of the psychological situation of the visitor through the different contents of the psychological scales in the psychological assessment software, so as to understand the current situation of the visitor's heart.
According to the number of users, psychological assessment tools are divided into individual assessment equipment and group assessment equipment. According to the differentiation of the use of objects, psychological assessment tools can be divided into educational version, comprehensive version, army version, medical version, fire version, judicial version.
The times are developing, the environment is changing, the knowledge is iterating, and the inner world of human beings is also changing with the times. The scale content and inner algorithm of the psychological assessment tools are very professional and complicated and systematic. It is recommended to choose the comprehensive and latest version of the psychological assessment system, so as to avoid the test results misleading the counselor's judgment on the real psychological state of the visitor, resulting in clinical errors.