Tests of measurement invariance are essential to determining whether individual scores or group averages are comparable across populations. While international comparisons of mean IQ scores are common, tests of measurement invariance for intelligence test batteries (necessary for comparisons to be empirically supported) are rare. In this study,…

The catalyst for this study emerged from the unprecedented number of Ghanaian students with reading difficulties, in an environment where school counselors are generally unavailable, funding is limited, and most educators do not recognize learning disabilities as true disabilities. Based on the limitations of the IQ-achievement discrepancy model…

This dissertation examines the determinants of student outcomes--achievement, attainment, occupational choices and earnings--in three different contexts. The first two chapters focus on Ghana while the final chapter focuses on the US state of Massachusetts. In the first chapter, I exploit the incidence of famine and malnutrition that resulted to…