Effects of Computer Aided Design (CAD) in Teaching Electrical Drafting in Technical Colleges in Rivers State of Nigeria

Abstract

The study was on the effects of Computer Aided Design (CAD) in teaching electrical drafting in technical colleges in Rivers State of Nigeria. A Quasi-Experimental design was adopted for the study. The population of the study was 89 students comprised of all the vocational 1 students in the 5 technical colleges in Rivers State of Nigeria. A purposive sampling technique was used to select two technical colleges for the study of which simple sampling technique was used to select 20 students (10 boys and 10 girls) in each school. The total sample size was 40 students. Two intact classes of experimental and control groups in each college were used. Two parallel instrument of Pre-DAT and Post-DAT were developed, validated and reliability duly taken before using them to collect data. The research questions were answered using mean and standard deviation while the hypotheses were tested at P < 0.05 using Analysis of Covariance (ANCOVA). The result of the data analysis showed that, there was a significant difference between the experiment group and control group with the mean performance score of CAD group being more than the conventional group. There was no significant difference in the mean performance scores of male and female students taught using CAD. Based on the findings, some recommendations were made.