term ▁care ▁facility ▁reported ▁feeling ▁less ▁pain ▁after ▁watching ▁hum orous ▁mov ies ▁and ▁required ▁less ▁non - sch eduled ▁medic ation ▁than ▁the ▁control ▁group ▁who ▁watched ▁a ▁non hum orous ▁movie . ▁However , ▁Adams ▁and ▁Mc Gu ire ▁did ▁not ▁discuss ▁whether ▁or ▁not ▁participants ▁took ▁part ▁in ▁additional ▁ther ap ies ▁as ▁a ▁part ▁of ▁their ▁daily ▁routine . ▁It ▁is ▁possible ▁that ▁additional ▁ther ap ies ▁may ▁have ▁contributed ▁to ▁the ▁decrease ▁in ▁pain ▁and ▁in ▁effect ▁would ▁threaten ▁the ▁internal ▁valid ity ▁of ▁the ▁study ▁had ▁they ▁not ▁controlled ▁for ▁the ▁additional ▁ther ap ies . ▁ ▁Dum tra che ▁( 2 0 1 4 ) ▁conducted ▁a ▁study ▁that ▁expl ored ▁the ▁use ▁of ▁cin em ather apy ▁in ▁a ▁group ▁setting ▁and ▁its ▁effect iveness ▁on ▁dimin ishing ▁anx iety ▁in ▁young ▁people . ▁She ▁found ▁a ▁significant ▁drop ▁in ▁anx iety ▁between ▁those ▁in ▁the ▁control ▁group ▁and ▁those ▁in ▁the ▁cin em ather apy ▁group . ▁The ▁method ology , ▁however , ▁ra ises ▁questions ▁regarding ▁the ▁study ’ s ▁valid ity . ▁The ▁sample ▁was ▁chosen ▁based ▁on ▁a ▁cluster ▁sample ▁of ▁students ▁who ▁expressed ▁their ▁desire ▁to ▁take ▁part ▁in ▁a ▁development ▁group ▁foc using ▁on ▁mov ies ▁– ▁making ▁it ▁a ▁pseud or andom ▁sample . ▁The ▁fact ▁that ▁students ▁expressed ▁their ▁desire ▁to ▁take ▁part ▁in ▁such ▁ther apy ▁may ▁have ▁affected ▁the ▁outcome . ▁▁ ▁Gary ▁Sol omon , ▁Ph D , ▁MP H , ▁MS W ,