Before revision: Origins and history Although it is difficult to formally express when situations restricting individual differences in personality began in psychology, work conducted by Carl Rogers suggested that certain individual differences are mostly likely to manifest themselves in situations where there is psychological freedom and safety, compared to situations where psychological freedom and safety do not exist.
After revision: Origins and history Although it is difficult to formally express when situations restricting individual differences in personality began in psychology, work conducted by Carl Rogers suggested that certain individual differences are most likely to manifest themselves in situations where there is psychological freedom and safety, compared to situations where psychological freedom and safety do not exist.