These aren't invented games.

The tasks inside Tusi are reimagined versions of methods researchers and clinicians have studied for roughly a century. The newest below is from the 1970s; the oldest predates 1920.

Where the tasks come from

Each challenge descends from a public-domain paradigm with a long research history. What you meet in Tusi is adapted from these methods, not a copy of any named instrument.

• Clock Assembly Challenge

  Adapted from the clock drawing task

  A long-standing clinical task in which a person draws a clock face set to a given time; still widely used, and later built into brief screening batteries (Borson and colleagues, 2000).

  Looks at visuospatial awareness and planning

• Trail Connection Path

  Adapted from the Trail Making Test

  Began as Partington's Pathways (1938); named the Trail Making Test when it entered the U.S. Army Individual Test Battery in 1944, and validated as an indicator of brain injury by Reitan in 1958. Public domain.

  Looks at attention, processing speed, and mental flexibility

• Digit-Symbol Matching Race

  Adapted from digit-symbol substitution

  Described in psychometric work with schoolchildren by 1913 and adopted in U.S. Army testing in 1917; formalized in adult intelligence testing in 1939.

  Looks at processing speed, attention, and working memory

• Cube Sequence

  Adapted from the Corsi block-tapping task

  Devised in the early 1970s using nine identical wooden blocks tapped in sequence, to measure visuospatial short-term memory.

  Looks at visuospatial working memory

• Pattern Reconstruction

  Adapted from the block design task

  Samuel C. Kohs published his Block Design manual in 1920 at Stanford, using colored cubes to recreate patterns of increasing difficulty.

  Looks at spatial planning and executive function

• Selective Attention

  Adapted from the Stroop interference effect

  J. Ridley Stroop published his interference experiments in 1935, showing how automatic reading competes with naming ink color.

  Looks at attention, inhibition, and cognitive flexibility

What we do and don't claim

Your data

A short account of how the current build handles identity and privacy. For the full policy, see Privacy.

• Accounts are handled by Amazon Web Services' managed identity service (Amazon Cognito); Tusi never stores your password.
• Traffic to and from the site is encrypted in transit (HTTPS).
• Tusi does not sell personal information and does not share it with advertisers.
• You can request deletion of your account and associated data via Contact.

Selected references