▁individual ▁psych other apy , ▁family ▁ther apy , ▁occup ational ▁ther apy , ▁etc .) ▁designed ▁to ▁reduce ▁the ▁social ▁and ▁emot ional ▁impact ▁of ▁the ▁ill ness . ▁The ▁pro gn osis ▁var ies ▁depending ▁upon ▁the ▁nature , ▁sever ity , ▁and ▁duration ▁of ▁the ▁sympt oms , ▁but ▁about ▁two - third s ▁of ▁individuals ▁diagn osed ▁with ▁sch iz op hren iform ▁dis order ▁go ▁on ▁to ▁develop ▁sch iz op hren ia . ▁ ▁Sign s ▁and ▁sympt oms ▁ ▁Sch iz op hren iform ▁dis order ▁is ▁a ▁type ▁of ▁mental ▁ill ness ▁that ▁is ▁character ized ▁by ▁psych osis ▁and ▁closely ▁related ▁to ▁sch iz op hren ia . ▁Both ▁sch iz op hren ia ▁and ▁sch iz op hren iform ▁dis order , ▁as ▁defined ▁by ▁the ▁Di agnostic ▁and ▁Statist ical ▁Man ual ▁of ▁M ental ▁Dis orders ▁( DS M - IV - TR ), ▁have ▁the ▁same ▁sympt oms ▁and ▁essential ▁features ▁except ▁for ▁two ▁differences : ▁the ▁level ▁of ▁functional ▁imp air ment ▁and ▁the ▁duration ▁of ▁sympt oms . ▁Imp air ment ▁in ▁social , ▁occup ational , ▁or ▁academic ▁function ing ▁is ▁usually ▁present ▁in ▁sch iz op hren ia , ▁particularly ▁near ▁the ▁time ▁of ▁first ▁diagn osis , ▁but ▁such ▁imp air ment ▁may ▁or ▁may ▁not ▁be ▁present ▁in ▁sch iz op hren iform ▁dis order . ▁In ▁sch iz op hren iform ▁dis order , ▁the ▁sympt oms ▁( including ▁prod rom al ,