This is a test of visual pattern recognition memory in a 2-choice forced discrimination paradigm. This test is often used, in conjunction with Spatial Recognition Memory (SRM) , before the Paired Associates Learning (PAL)test, as both these tests help to train the subject for PAL.
PRM and SRM contain different elements of PAL and the results considered together help to decide on the exact nature of the cognitive deficit being considered. |
Administration time
Around 5 minutes, depending on level of impairment
Task
The subject is presented with a series of 12 visual patterns, one at a time, in the centre of the screen. These patterns are designed so that they cannot easily be given verbal labels. In the recognition phase, the subject is required to choose between a pattern they have already seen and a novel pattern. In this phase, the test patterns are presented in the reverse order to the original order of presentation.
This is then repeated, with 12 new patterns. The second recognition phase can be given either immediately or after a 20 minute delay.
Test modes
Clinical mode (for testing once); four parallel modes (for repeated testing). Each of these modes also has separate immediate and delayed versions available.
Outcome measures
This test has three outcome measures, including the number and percentage of correct trials and latency (speed of subject’s response).
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