Psychometric properties of the ordinary progressive matrices test for the Libyan sample Age group (23 – 36)

Abstract

The study aimed to assess the validity of the normal continuous matrices test for use with the age group (23-36) in the Green Mountain region. The test was administered to a sample of (560) participants (280 males, 280 females), selected using stratified random sampling. Statistical Package for the Social Sciences (SPSS) was employed for statistical analysis in the current study. The reliability coefficients were calculated using the (Kuder-Richardson Formula 20 (KR-20) for both males and females separately in each age group and for the total sample. The results indicated a good level of reliability for the test, with reliability coefficients ranging from (.81) for the male sample at the age of 36 to (.95) for the male sample at the age of 31. Using the split-half method (Spearman-Brown) to assess the test reliability based on gender, age groups, and the overall sample, the results showed reliability coefficients ranging from (.86) for the male sample at the age of 36 to (.97) for the female sample at the age of 33.