该基本模型自Reynolds提出以来,已用多种方法扩展。例如,Delgado-Mata <ref>{{cite journal|first1= Carlos | last1= Delgado-Mata|first2= Jesus Ibanez | last2= Martinez|first3= Simon | last3= Bee|first4= Rocio | last4= Ruiz-Rodarte|first5= Ruth | last5= Aylett|title= On the use of Virtual Animals with Artificial Fear in Virtual Environments | 该基本模型自Reynolds提出以来,已用多种方法扩展。例如,Delgado-Mata <ref>{{cite journal|first1= Carlos | last1= Delgado-Mata|first2= Jesus Ibanez | last2= Martinez|first3= Simon | last3= Bee|first4= Rocio | last4= Ruiz-Rodarte|first5= Ruth | last5= Aylett|title= On the use of Virtual Animals with Artificial Fear in Virtual Environments |