Blocks will light up in a sequence - tap them back in the same order. Each correct round adds one more block. Average visuospatial span is 5โ6 blocks.
Created by Philip Corsi in the 1970s, this test measures visuospatial working memory - distinct from verbal memory. Interestingly, most people's Corsi span (5-6) is slightly lower than their verbal digit span (7), suggesting spatial memory is more limited. Visuospatial span is a distinct human benchmark from verbal memory, and often overlooked.
Compare your Corsi span with your Digit Span and Visual Memory results.
Visuospatial span is a distinct human benchmark from verbal memory โ and one most online tests completely ignore.
Developed by Philip Corsi in the early 1970s and refined through decades of clinical use, the Corsi Block Test measures visuospatial working memory span - how many spatial locations you can hold in active memory and reproduce in the correct sequence. The original physical version used wooden blocks on a board; neuropsychologists still use it today to assess patients with brain lesions, stroke, or neurodegenerative disease.
A key scientific finding: most people's Corsi span (spatial: average 5โ6 blocks) is slightly lower than their digit span (verbal: average 7 digits). This consistent asymmetry - known as the verbal advantage in working memory - reflects the greater efficiency of the phonological loop compared to the visuospatial sketchpad, likely because language is evolutionarily and developmentally more practiced.
The Corsi test is particularly sensitive to damage in the right posterior parietal cortex and hippocampus. Patients with right hemisphere lesions typically show Corsi spans well below normal while their digit span remains relatively preserved - a double dissociation that helped establish the independence of verbal and visuospatial memory systems. This clinical diagnostic value makes it one of the most frequently used neuropsychological assessment tools worldwide.
Scores of 7+ on this test represent the top 25% of users. Architecture students, surgeons, and chess players - all of whom develop exceptional spatial reasoning - consistently outperform the general population on the Corsi Block Test. Regular visuospatial practice (navigation without GPS, 3D puzzle games, drawing) may support maintenance of spatial memory capacity.
The average spatial span is 5-6 blocks. Scores of 7 or more place you in the top 25% of users on this test.
This is normal and expected. Most people's spatial span averages 5-6 blocks versus a verbal digit span average of 7, a consistent asymmetry known as the verbal advantage in working memory.
It is particularly sensitive to damage in the right posterior parietal cortex and hippocampus, and neuropsychologists use it to assess patients with brain lesions, stroke, or neurodegenerative disease.
Span refers to the longest sequence of blocks you can correctly recall in the exact order they lit up, which is the standard scoring unit for this test.
They're related but distinct - spatial memory specifically involves remembering locations and sequences in space, while visual memory can include broader details like shapes, colors, and patterns.
Yes, regular practice with spatial memory tasks can lead to measurable improvement, particularly through strategies like grouping blocks into visual patterns or paths.
Yes, spatial working memory as measured by this test shares underlying cognitive mechanisms with real-world navigation and the ability to remember routes and locations.
Spatial and verbal memory rely on partially different brain networks, so individuals often have a natural strength in one over the other depending on their cognitive profile.
Yes, it's a well-established neuropsychological tool used in both clinical and research settings to assess visuospatial working memory, often alongside verbal span tests.
Architecture students, surgeons, and chess players consistently outperform the general population, since they develop exceptional spatial reasoning through their training.