Originally Posted by crucifissio

science
ˈsʌɪəns/
noun
noun: science

the intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.

your quote says psychology is not "scientifically rigorous"

it is a very grey area at best and one can not disqualify psychology as a science even with mental gymnastics of olympic caliber...the very definition of science is damning to your claim