Complex Tasks Force Hand Laterality and Technological Behaviour in Naturalistically Housed Chimpanzees: Inferences in Hominin Evolution

Table 1

Hand preferences and consistency for simple reaching and hose task at the FM chimpanzees. R: right-hand preference. L: left-hand preference. A: Nonpreferent.

Subject	Hand preference	Hand preference	Consistency
	Simple reaching	Hose task
Bongo	R	R	Yes
Charly	L	R	No
Julio	L	R	Yes
Juanito	A	R	No
Marco	R	R	Yes
Nico	R	R	Yes
Pancho	R	R	Yes
Romie	L	L	Yes
Sara	R	L	No
Tico	R	L	No
Toni	L	R	No
Toto	R	R	Yes
Victor	R	R	Yes
Waty	A	L	No