Al-Ghamari S. Reliability and validity coefficients of the ordinary progressive matrices (SPM) test for the Libyan sample, age group (38-50) years. mjssc [Internet]. 2011 Dec. 31 [cited 2025 Nov. 19];12(1):158-80. Available from: https://mdp.omu.edu.ly/journals/index.php/mjssc/article/view/260