This Central African nation has faced challenges in education and economic development, which can affect IQ scores.
Despite being one of Africa's largest economies, Nigeria grapples with educational disparities and economic inequality that may impact IQ scores.
Zimbabwe has struggled with political instability and economic challenges, which can have implications for education and cognitive development.
Limited access to education and healthcare in Papua New Guinea may contribute to lower average IQ scores in some studies.
Economic struggles and limited access to education have been cited as factors that may influence Mozambique's average IQ scores.
Swaziland faces challenges related to poverty, HIV/AIDS, and educational disparities, which can impact cognitive development and IQ scores.
Despite progress in education and healthcare, Malawi continues to face challenges related to poverty and infrastructure, which may affect average IQ scores.