Artificial Intelligence has the potential to bring about significant change and societal development,
especially the educational sector. This study investigates the effect of Artificial Intelligence (AI) on
cognitive development among students of selected tertiary institutions in Nasarawa State, Nigeria.
Cross-sectional survey was employed for the study. Data was collected using questionnaire and
in-depth interview. The purpose for both qualitative and quantitative methodologies was for
triangulation of results. A survey questionnaire was administered to 1,200 students from three
tertiary institutions in Nasarawa State, while in-depth interview was conducted with 30
personalities using statuses occupied within the academia. Multi-stage sampling technique was
employed for the study. Qualitative data was analyze using content analysis, while quantitative
data was processed using Statistical Package for Social Sciences (SPSS) version 27. Statistical
tools used were frequency table, percentages, and regression analysis. The results show both
positive and negative effect of AI on the cognitive development of students in tertiary institutions
in Nasarawa State, Nigeria. The positive effects of AI on cognitive development with the selected
tertiary institutions in Nasarawa State includes improved learning and speaking skills, critical
thinking, problem-solving, analytical reasoning, enhances knowledge of courses, and simplifies
technical aspects, and quick understanding. It personalizes teaching methods to suit individual
student needs and provides prompt feedback. However, the negative effects are in the areas of
students lazing about, and reduction in reading culture. The study also reveals that inadequate
infrastructure, lack of trained personnel, and limited access to AI resources hinder the effective
integration of AI in teaching and learning processes. The study recommends that tertiary
institutions in Nasarawa State should invest in AI infrastructure, provide training for lecturers,
and develop policies that promote the use of AI in education.