Table 3.

Mean (M) and standard deviation (SD) of single object (O) and signal+noise (O+noise).

	NR (N = 43)		DDP+ (N = 18)		DDP− (N = 14)
	M	SD	M	SD	M	SD
O	94	8.27	93	10.53	89.50	9.30
O+noise	64	21.89	64	21.66	47	23.83