This study investigated social group phenomenon of group polarization effects on disciplinary hearing decisions in
selected Kenyan secondary school. The participants were 78 school personnel (females = 42%and males 58%) from ten
secondary schools with both unisex (n = 39) and co-educational schools (n = 39). Both quantitative and qualitative data
were collected and analyzed. The results suggested group polarization effects in disciplinary hearing decisions, in that
there were shifts from pre to post-disciplinary hearing decisions. Persuasive arguments and social comparisons
significantly influenced group polarization decisions.