Table 2. Preliminary norms based on meta-analysis of physician performance.

			< -3 sd.	-3 sd.	-2.5 sd.	-2 sd.	-1.5 sd.	-1 sd.	-.5 sd.	.5 sd.	1 sd.	1.5 sd.	2 sd.	2.5 sd.	3 sd.	>3 sd.
Index	Standard Deviation	Mean	Refer for extended assessment ….				←←←
MicroCog			Below Average	Below Average	Below Average	Low Average	Low Average	Average				Above Average
Heaton			Severe Impairment	Moderate to Severe	Moderate Impairment	Mild to Moderate	Mild Impairment	Below Average	Average		Above average
Attention/mental control	11	107	***	73	78	84	90	96	101	113	118	124	130	135	141	***
Reasoning/calculation	12	111	***	74	80	86	93	99	105	117	124	130	136	142	148	***
Memory	11	111	***	78	83	89	94	100	105	116	122	127	133	138	144	***
Spatial Processing	9	107	***	79	84	88	93	98	102	112	116	121	125	130	135	***
Reaction Time	10	112	***	81	86	91	96	102	107	117	122	127	132	137	143	***
Information processing speed	13	104	***	66	72	79	85	91	97	110	116	123	129	135	141	***
Information Processing Accuracy	10	111	***	81	86	91	96	101	106	117	122	127	132	137	142	***
General Cognitive Functioning	11	109	***	77	82	88	93	99	104	115	120	126	131	136	142	***
General Cognitive Proficiency	12	109	***	74	80	85	91	97	103	115	121	127	132	138	144	***