Table 2.

Means and Standard Deviations of the Reaction Time and Percent of Correct Responses in the Low-Load Maintenance, Low-Load Manipulation, High-Load Maintenance, and High-Load Manipulation Conditions

Measure	Placebo mean (SD)	50 ng/ml ketamine mean (SD)	100 ng/ml ketamine mean (SD)
Low-load maintenance
Reaction time	1898.82 (228.35)	1883.00 (394.77)	1942.34 (332.84)
Percent correct	91.25 (9.32)	94.55 (8.79)	94.58 (9.88)
Low-load manipulation
Reaction time	1897.68 (284.14)	1871.75 (408.45)	1964.23 (287.46)
Percent correct	87.92 (12.15)	90.45 (14.40)	87.50 (13.90)
High-load maintenance
Reaction time	2264.97 (319.65)	2223.83 (355.17)	2251.75 (231.04)
Percent correct	79.17 (15.20)	79.09 (16.25)	78.33 (16.56)
High-load manipulation
Reaction time	2229.48 (373.16)	2432.78 (432.17)	2345.31 (408.49)
Percent correct	71.25 (15.39)	68.18 (16.01)	65.00 (21.11)