The CSI was designed to monitor cognitive status in healthy, at-risk, and afflicted populations. Although effective as a single-use screening tool to provide a "snapshot" of a client's cognitive profile, the CSI was designed primarily for use as a longitudinal measurement instrument. At its core is a series of repeatable neurocognitive tests that detect statistically significant, clinically meaningful change in central nervous system functioning. The CSI uses a series of short subtests that measure four empirically derived factors:

    1.   Attention/Working Memory
    2.   Spatial Memory/Learning
    3.   Response Speed
    4.   Processing Speed

The CSI norms were gathered to be useful in adults aged 18 to 90 across gender, race, and educational background.

Normative Sample Demographics

	Frequency	Percent
Age Group
18-29	70	24.65
30-49	77	27.11
50-69	82	28.87
>= 70	55	19.37
Gender
Female	151	53.17
Male	133	46.83
Ethnicity
Caucasian	209	73.59
African-American	31	10.92
Hispanic	9	3.17
Asian-American	13	4.58
Other	22	7.75
Education
<= 12 years	81	28.52
13-15 years	98	34.21
>= 16 years	105	36.97
Geographic Zone
South	79	27.82
North Central	80	28.17
West	56	19.72
Northeast	69	24.30

Concurrent Validity
The CSI has been shown to be similar to face-to-face measures.

Effect sizes are denoted as: *moderate, **moderately large, ***large.

The CSI uses individually tailored statistics to determine if cognitive status is improving, deteriorating, or remaining stable, and it has the advantage of greater accuracy in measuring response time than face-to-face tests. Initial "snapshot" cognitive profiles can be compared to a predicted score for healthy persons of similar age, gender, race, and education. Multiple equivalent alternate forms have been developed to afford simple, reliable, serial assessment of change, relative to the initial evaluation.

Last updated: December 18, 2001