Employment Testing of Persons with Diasabling Conditions - IPAC
Employment Testing of Persons with Diasabling Conditions - IPAC
Employment Testing of Persons with Diasabling Conditions - IPAC
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available evidence comes primarily from criterion-related and construct<br />
validity studies. Prim<strong>of</strong>f s major study (U.S. Civil Service Commission, 1956)<br />
<strong>of</strong> blind persons in trades and industrial occupations is probably the most<br />
well-developed example <strong>of</strong> a content validity study. Content validity is more<br />
feasible technically than criterion-related validity because it does not<br />
require gathering data on large numbers <strong>of</strong> subjects. On the other hand,<br />
content validity depends more on judgments, and some <strong>of</strong> these judgments may be<br />
difficult to make, as the Prim<strong>of</strong>f study points out.<br />
Table 2 presents a categorization <strong>of</strong> the primary testing accommodations.<br />
The first category, change <strong>of</strong> medium, refers to the use <strong>of</strong> a different medium<br />
or method to present the same information. In testing, the information is<br />
usually presented in the English language. Therefore, braille, large print,<br />
reader, and audiotape are simply different ways <strong>of</strong> presenting test questions<br />
in the same language. In most cases, these media could be interchanged<br />
<strong>with</strong>out a change in the effective question content or the ability being<br />
tested.<br />
liable 2 - Types <strong>of</strong> Accommodations<br />
Medium<br />
Braille, Audiotape, Large print, Reader<br />
Does not include sign language interpretation <strong>of</strong> questions<br />
May not include embossed figural materials<br />
Time Limits<br />
Speed test: Do not give extra time<br />
Power test: Unlimited time O.K.<br />
Speeded-power test: Context dependent<br />
Content Change<br />
Change item or items<br />
Change item-type<br />
Change or deletion <strong>of</strong> knowledge, skill, or ability (KSA)<br />
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