Table 1.

Means, Standard Deviations and Ranges for the Clinical and N-back Task Data

	Sample Size	Range	Mean	SD
General Cognitive Status
RBANSa
Immediate Memory	35	69 – 126	102.37	13.65
Visuospatial Construction	35	58 – 112	87.43	14.54
Language	35	85 – 127	102.09	11.97
Attention	35	72 – 138	102.57	15.85
Delayed Memory	35	68 – 130	100.94	12.29
Global Cognitive Status (total)	35	80 – 122	98.09	11.20
Objective Measures
Executive Functioning: D-KEFS
Letter Fluency	35	18 – 58	39.66	9.66
Design Fluency	35	14 – 43	25.29	7.23
Executive Compositeb	35	−2.70 – 3.24	.00	1.57
Prospective Memory
Hidden Objects	32	0 – 3	2.13	.91
Activity Paradigm	32	0 – 8	6.26	2.59
Prospective Memory Total	32	0 – 11	8.39	3.01
Performance-based Functional Status
ILS Managing Home	17	20 – 29	26.53	2.67
ILS Health & Safety	17	31 – 38	34.06	2.22
Functional Status Compositeb	17	−3.37 – 2.70	.00	1.79
Self-Report Measures
Cognitive Failures
DEXc	30	1 – 28	11.19	7.82
PRMQc	30	20 – 51	33.87	7.20
Cognitive Failures Compositeb	30	−3.10 – 4.40	.00	1.84
Self-report Functional Status
IADL-Cc	30	27 – 62	36.99	8.86
N-back Task Variables
Clinical Averaged	35	11 – 33	23.44	5.55
Asymptotee	35	24 – 40	33.53	4.14
EMA Average	35	22 – 41	33.19	4.30
IIVc	35	.83 – 3.11	1.86	.53

Note. RBANS = Repeatable battery for the assessment of neuropsychology status; D-KEFS = Delis-Kaplan Executive Function System; PM = Prospective Memory; DEX = Dysexecutive Questionnaire; PRMQ = Prospective and Retrospective Memory Questionnaire; ILS = Independent Living Scale; IADL-C = Instrumental Activities of Daily Living: Compensation; EMA = Ecological Momentary Assessment; IIV = intra-individual variability

^aPresented as scaled scores,

^bPresented as z-scores,

^cHigher score = poorer performance,

^dn-back practice trials 1–10,

^en-back practice trials 91–100