Table 2.

Mean arousal and valence (standard deviation shown in parenthesis) of the four image sets used in Experiments 1–5.

Image set	Dimension	Experiment 1	Experiment 2	Experiment 3	Experiment 4	Experiment 5
IAPS high-arousing positive	Arousal	6.5 (2.1)	6.5 (2.1)	6.5 (2.1)	6.5 (2.1)	6.5 (2.1)
	Valence	6.5 (1.9)	6.5 (1.9)	6.8 (1.8)	6.8 (1.8)	6.5 (1.9)
IAPS high-arousing negative	Arousal	6.2 (2.3)	6.2 (2.3)	6.3 (2.4)	6.3 (2.4)	6.2 (2.3)
	Valence	2.0 (1.3)	2.0 (1.3)	1.9 (1.3)	1.9 (1.3)	2.0 (1.3)
IAPS low-arousing positive	Arousal	3.8 (2.2)	3.8 (2.2)	3.8 (2.2)	3.8 (2.2)	3.8 (2.2)
	Valence	7.1 (1.4)	7.1 (1.4)	7.0 (1.5)	7.0 (1.5)	7.1 (1.4)
Spider pictures	Arousal	3.8 (1.2)	6.5 (2.1)	6.7 (0.4)	7.4 (0.3)	3.9 (0.3)
	Valence	5.2 (1.4)	2.7 (1.4)	1.8 (0.2)	2.2 (0.4)	4.8 (0.3)