They had been employed for an average of 3.6 years (SD, 2.4 years). Most (88%) of the participants were married. Only about a third has had relevant working experience prior to this job. The mean pretest score was 34.0% (SD, 2.1), which increased to 56.3% (SD, 2.3) at posttest. The mean paired difference in score between post-and pretest of 22.3% (SD, 10.4) was statistically significant p 00.000. There was also a statistically significant difference between the proportion of participants who passed the posttest but failed the pretest [16 (69.6%)] and the proportion who passed the pretest but failed the posttest [0 (0%)]; p 00.000. The mean score of male participants was higher at the pretest (35.6% vs. 32.0%) while the females performed better at the posttest (57.3% vs. 55.6%), although this difference was not statistically significant. The ages of participants and the number of years of employment were also not statistically associated with their performance in the pre-and posttests. 