The SSI is a 90-item instrument designed as a brief but comprehensive self-report measure to assess basic social communication skills. (There is an abbreviated form of the SSI, consisting of 30 items from the original 90 items. This Brief-SSI is discussed in Part 5 of this Manual). Originally developed for use in personality and social psychology research, but now widely used in personnel work, in clinical settings, and for training, the SSI measures social skills in six domains and provides a total score to reflect a global level of social skill development indicative of overall social competence or social intelligence.
The SSI consists of six scales that measure communication skills on two dimensions or levels – emotional (nonverbal) and social (verbal). Expressivity, sensitivity, and control are evaluated in each: expressivity refers to the skill with which individuals communicate or send messages to others; sensitivity refers to the skill with which they receive and interpret the communicated messages of others, and control refers to the skill with which they are able to regulate and manage the communication process.