▁and ▁ 2 4 ▁others ▁were ▁exposed ▁to ▁a ▁non - ag gress ive ▁mode . ▁Each ▁group ▁was ▁co ed , ▁ens uring ▁that ▁half ▁of ▁the ▁children ▁were ▁exposed ▁to ▁models ▁of ▁their ▁own ▁gender ▁and ▁the ▁other ▁half ▁were ▁exposed ▁to ▁models ▁of ▁the ▁opposite ▁gender . ▁The ▁remaining ▁ 2 4 ▁children ▁compr ised ▁a ▁control ▁group . ▁ ▁For ▁the ▁experiment , ▁each ▁child ▁was ▁exposed ▁to ▁the ▁scenario ▁individually , ▁so ▁as ▁not ▁to ▁be ▁influenced ▁or ▁dist ract ed ▁by ▁class m ates . ▁The ▁first ▁part ▁of ▁the ▁experiment ▁involved ▁bringing ▁a ▁child ▁and ▁the ▁adult ▁model ▁into ▁a ▁play room . ▁In ▁the ▁play room , ▁the ▁child ▁was ▁se ated ▁in ▁one ▁corner ▁filled ▁with ▁appe aling ▁activities ▁such ▁as ▁stick ers ▁and ▁st amps . ▁The ▁adult ▁model ▁was ▁se ated ▁in ▁another ▁corner ▁with ▁a ▁to y ▁set , ▁a ▁mal let , ▁and ▁an ▁infl atable ▁Bob o ▁doll . ▁Before ▁leaving ▁the ▁room , ▁the ▁experiment er ▁explained ▁to ▁the ▁child ▁that ▁the ▁to ys ▁in ▁the ▁adult ▁corner ▁were ▁only ▁for ▁the ▁adult ▁to ▁play ▁with . ▁ ▁During ▁the ▁ag gress ive ▁model ▁scenario , ▁the ▁adult ▁would ▁begin ▁to ▁play ▁with ▁the ▁Bob o ▁doll , ▁then ▁would ▁start ▁to ▁show ▁ag gress ive ▁behavior ▁towards ▁the ▁doll . ▁Ex amples ▁of ▁this ▁ag gress ive ▁behavior ▁include ▁hitting / p unch ing ▁the ▁Bob o ▁doll ▁and ▁using ▁the ▁to y ▁mal let ▁to ▁hit