What size are the blocks used in Box and Block Test?

What size are the blocks used in Box and Block Test?

• A. 1 cm
• B. 2.5 cm
• C. 5 cm
• D. 10 cm

Answer: (B)

The Box and Block Test uses standardized blocks that are 2.5 cm on each side. This size is chosen because it’s large enough to be handled quickly with a whole-hand grasp, yet small enough to require coordinated finger and hand movement, which is what the test aims to measure for gross manual dexterity. The blocks are 2.5 cm (about 1 inch) cubes, and the standard setup includes 150 of them arranged in one compartment to be moved to the other within a fixed time. If the blocks were bigger, the task would measure different, easier motor skills; if much smaller, it would shift toward fine dexterity, making results less comparable.

The Box and Block Test uses standardized blocks that are 2.5 cm on each side. This size is chosen because it’s large enough to be handled quickly with a whole-hand grasp, yet small enough to require coordinated finger and hand movement, which is what the test aims to measure for gross manual dexterity. The blocks are 2.5 cm (about 1 inch) cubes, and the standard setup includes 150 of them arranged in one compartment to be moved to the other within a fixed time. If the blocks were bigger, the task would measure different, easier motor skills; if much smaller, it would shift toward fine dexterity, making results less comparable.