?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Tangpornpaiboon&rft.aufirst=Sirin&rft.au=Tangpornpaiboon%2C+Sirin&rft.date=28+November+2022&rft.tpages=479&rft.title=Understanding+Discrepancies+in+Trend+Results+of+PISA%2C+TIMSS%2C+and+O-NET+and+Implications+for+Education+Policies+in+Thailand&rft.inst=UCL+(University+College+London)&rft.degree=Doctoral