Ka dibna ka jawaab su'aasha ka dibna afka la mid ah sida marinka: Marinka: Bishii Agoosto 2005, Ururka American Psychological Association ayaa muujiyay baahida loo qabo cilmi nafsiga tirada badan ee warshadaha <unk> waayo, PhD kasta la siiyay ee mawduuca, waxaa jiray oo ku saabsan 2.5 cilmi nafsiga tirada boos furan. Sababtoo ah la'aanta codsadayaasha ee berrinka, APA abuuray Task Force ah in ay bartaan xaaladda cilmi nafsiga tirada iyo saadaaliyo mustaqbalka. codsadayaasha gudaha Maraykanka ayaa si gaar ah la la'yahay. inta badan codsadayaasha caalamiga ah ka yimaadaan dalalka Asia, gaar ahaan South Korea iyo Shiinaha.
Sanadkii 2006