[1] The original definition of social intelligence (by Edward Thorndike in 1920) is "the ability to understand and manage men and women and boys and girls, to act wisely in human relations".
[citation needed] Neuropsychologist Nicholas Humphrey believes that social intelligence defines who we are as humans.
[3] An updated definition coined by Nancy Cantor and John F. Kihlstrom in 1987 is “the individual's fund of knowledge about the social world.
Archaeologist Steve Mithen believes that there are two key evolutionary periods of human brain growth that contextualize the social intelligence hypothesis.
These changes required a greater mental capacity and, in turn, a larger brain size.
[13][page needed] The social intelligence quotient (SQ) is a statistical abstraction, similar to the ‘standard score’ approach used in IQ tests, with a mean of 100.
[14][better source needed] It leans more toward Jean Piaget's theory that intelligence is not a fixed attribute, but a complex hierarchy of information-processing skills underlying an adaptive equilibrium between the individual and the environment.
This test[specify] can also be used to check for some non-autistic or semi-autistic conditions such as social communication disorder or SCD, schizophrenia, dyssemia, and ADHD.
[17] It was originally proposed as a measurement of a person's capacity to deal with people and social relationships.
[further explanation needed] Effects include blood flow[specify], breathing[specify], mood such as fatigue and depression, and weakening of the immune system.
[21] Researcher Raymond H. Hartjen believes that intelligence is amplified by increased social interactions.
[citation needed] This suggests that children require continuous opportunities for interpersonal experiences in order to develop a keen 'inter-personal psychology'.
Because we so limit the development of the skills of "natural psychologist" in traditional schools, graduates enter the job market handicapped to the point of being incapable of surviving on their own.