The authoritarian parenting definition is that it is an extremely strict form of parenting in which the parent expects the child to follow rules that they set. (checkpregnancy.com)
So if you can get even one set of 6 with strict form then next workout you should increase the weight. (legionathletics.com)
Use strict form with light weight for 8 - 12 reps and stop within 2 reps of failure. (kingofthegym.com)