Parapsychology. The higher than chance a particpant has in being right using zener cards. See decline effect- focusing effect- position effect- preferential effect- sheep-goat effect.

Additional equipment for tilling tool. Placed at both ends of all tiller tines, it helps protect the plants located along the work area.

The term ‘differential effect’ refers to a change happening to something as a result of varying action of a causative factor.