Table 3. Signal detection analysis.

	High-Cat	Low-Cat	T(df)	P
Hit rate	71.3 ± 7.3	67.93 ± 8.5	1.14(27)	0.27
False alarm	6.2 ± 5.5	4.7 ± 6.6	0.67 (27)	0.52
d’	2.9 ± 0.6	2.8 ± 0.7	0.71(27)	0.49
Response bias	0.01 ± 0.33	0.26 ± 0.33	2.03(27)	0.052

Output from signal detection analysis including average scores (mean ± SD) for hit rate, false alarms, sensitivity index (d’) and response bias. T values and P values from statistical comparisons of each group are also shown.