Table 1.

Testing protocol for five-stage attentional set-shifting task (AST).

Discrimination stage	Dimensions		Example combinations
	Relevant	Irrelevant	(+)	(−)
SD	Medium		Scouring pad	Facial puff
CD	Medium	Odor	Scouring pad/Rosemary	Facial puff/Nutmeg
			Scouring pad/Nutmeg	Facial puff/Rosemary
IDS	Medium	Odor	Wooden balls/Clove	Googly eyes/Cinnamon
			Wooden balls/Cinnamon	Googly eyes/Clove
RL	Medium	Odor	Googly eyes/Clove	Wooden balls/Cinnamon
			Googly eyes/Cinnamon	Wooden balls/Clove
EDS	Odor	Medium	Citronella/White paper	Thyme/Crepe paper
			Citronella/Crepe paper	Thyme/White paper

Examples of stimulus pairs and the progression through stages of the AST protocol. For each stage, the positive stimulus in bold was randomly paired across trials with the two stimuli from the irrelevant dimension. The assignment of each exemplar in a pair as positive or negative in a given stage, as well as the left-right positioning of the pots in the arena on each trial, were randomly determined in advance.