Protocol - Color Vision
Red-green and blue-yellow color blindness are tested using the Neitz Test of Color Vision, a disposable 1-page test which consists of 1 demonstration and 8 test panels. In each plate, colored dots of three different sizes and two different saturations form the outline of a geometrical shape. The shapes, presented as multiple choices, are a circle, a square, a triangle, a diamond, and nothing. The examinee marks the option that represents what he or she sees in the grey dot pattern.
Because the test is a precisely calibrated instrument, reproductions of the forms will not yield satisfactory results. Color copiers cannot adequately reproduce the colors that are necessary for the test to yield a valid classification. Furthermore, the test is copyrighted and proprietary and it is therefore impermissible to photocopy test materials for reuse. Test sheets, scoring key and users manual can be purchased from Western Psychological Services, 12031 Wilshire Blvd. Los Angeles, CA 90025-1251, Telephone: (800) 648-8857 - FAX: (310) 478-7838. *Prices of each item are listed below (prices may be subject to change):
Item No. Description Price W-377A Test sheets (package of 50) $54.50 W-377B Manual $38.50 W-377C Scoring Key $14.00
*prices obtained October 15, 2009.
Lighting: the Neitz Test. must be given in a well-lit area, and the light must not come from an incandescent source (regular light bulb). The test works properly under light coming from a strong fluorescent source or a combination of natural light (sunlight) and fluorescent light.
As shown in Figure 1, the Neitz Test presents a grid including one demonstration item and eight test items, which consist of a gray-scale and color pattern. The Neitz Test detects the two main classes of color blindness, red-green and blue-yellow. The Neitz Test detects both subtypes of red-green color vision (deutan and protan), and it can give an indication of the severity of red-green color blindness.
Each of the nine gray-scale and color patterns has a geometric shape embedded in it. The test panel contains a vanishing-type, desaturated geometric shape against a neutral background. A set of darker dots on each plate suggests an alternate shape that serves as a distractor.
Below each pattern are five response options: a circle, a triangle, a square, a diamond, and nothing. The examinee simply marks the option that represents what he or she sees in the grey dot pattern. Alternatively, small children are instructed to trace the shape they see in each panel with a pencil or crayon. The manual provides scripted instructions for an investigator to use in administering the protocol. The demonstration item is visible to even severely color-blind individuals and is designed to make the instructions clear. Anyone who makes one error or more on a test should be re-tested with different version of the form. The scoring key is used to obtain the test results and to identify the possible type and severity of the participants color vision deficiency.
Multiple versions of the test are available to facilitate group administration.
Sample Test Sheet for the Neitz Test of Color Vision copyright © 2001 by Western Psychological Services. Reprinted by RTI International for the sole purpose of illustration, by permission of WPS, 12031 Wilshire Boulevard, Los Angeles, California, 90025, U.S.A., www.wpspublish.com. Not to be reprinted in whole or in part for any additional purpose. All rights reserved.
Protocol Name from Source:
Personnel and Training Required
The test is copyrighted and proprietary and it is therefore impermissible to photocopy test materials for reuse. The testing materials include:
The Neitz Test of Color Test Sheets (WPS Product No. W-377A(1), (2), and (3))
The Scoring Key (WPS Product No. W-377C)
The Manual (WPS Product No. W-377B)
Available for purchase from:
Western Psychological Services
12031 Wilshire Blvd. Los Angeles, CA 90025-1251Telephone: (800) 648-8857 - FAX: (310) 478-7838
|Specialized requirements for biospecimen collection||No|
|Average time of greater than 15 minutes in an unaffected individual||No|
Mode of Administration
Child, Adolescent, Adult
Individuals aged 4 years and older
The Neitz detects the presence and severity of the two main classes of color blindness: blue-yellow (tritan) and red-green. It further distinguishes the two subtypes of red-green color blindness (deutan and protan). The Neitz test can be administered in group environments in less than 5 minutes, is suitable for persons of almost any age, including very young children, and requires no specialized training to administer or score.
|Common Data Elements (CDE)||Person Color Vision Text||3008667||CDE Browser|
|Logical Observation Identifiers Names and Codes (LOINC)||Color vision proto||62681-2||LOINC|
|Human Phenotype Ontology||Color blindness||HP:0007641||HPO|
Process and Review
SourceNeitz J., Summerfelt P., Neitz M. (2001) The Neitz Test of Color Vision Manual. Los Angeles, CA: Western Psychological Services.
Neitz, M., Neitz, J. (2001). A new mass screening test for color-vision deficiencies in children. Color Research and Application, 26(S1), S239-S249.
Barnhardt C, Block SS, Deemer B, Calder AJ, DeLand P. (2006). Color vision screening for individuals with intellectual disabilities: a comparison between the Neitz Test of Color Vision and Color Vision Testing Made Easy. Optometry, 77(5):211-6.
|Variable Name||Variable ID||Variable Description||dbGaP Mapping|
|PX110201000000||Protocol 110201 - proprietary. Check DCW for more||N/A|
February 26, 2010
A screening test to determine color blindness.
Color blindness is a common inherited disorder. Eight to 10 percent of all males are color blind, as well as approximately one-half of 1 percent of all females (Neitz, Summerfelt, and Neitz, 2001).
Ocular, Color Vision, Color blindness, Neitz, proprietary