Corsi blocks tasks with a normal forward order requires support from the visuospatial sketch pad, but not from the phonological loop. Whether able to perform the task well or not the ventrolateral prefrontal cortex is highly involved. So while humans may show encoding difficulty, this is not related to overall brain activation. An fMRI study involving subjects undergoing this test revealed that while the sequence length increases, general brain activity remains the same. This number is known as the Corsi Span, and average is about 5-6 for normal human subjects. It was based on the digit span task, but instead of the verbal form of the Digit Span, it required the use of visuo-spatial memory. The subject was required to point at the blocks in the order they were presented, or "tapped". The Corsi block tapping task originated in the early 1970s as a set of 9 identical wooden blocks positioned on a board. This number is known as the Corsi Span, and average is about 5-6 for typically 'normal' human subjects. The sequence starts out simple, usually using two blocks, but becomes more complex until the subject's performance suffers. It involves mimicking a researcher as they tap a sequence of up to nine identical spatially separated blocks. The Corsi block-tapping test is a psychological test that assesses visuo-spatial short term working memory. The yellow symbolizes the current block in the sequence.Īssesses visuo-spatial short term working memory This is an example of the computer version of the task.
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