The cognitive timed “up and go” test (CTUG) is designed to measure cognitive-motor interaction.
Motor task: The patient is instructed to perform the timed “up and go” test, wherein the patient from seated position stands up, walks 3 meters and return to seated position. This task is timed and the fastest performance of three trials is recorded (in seconds).
Cognitive task: In seated position the patient is instructed to classify objects as “soft” or “hard”. The rater read out loud objects from a standardized list of common objects like “house”, “grass”, “bicycle”. The patient is instructed to classify the object as fast as possible. After one practice trial the patient is instructed to classify 10 objects. This task is timed, and the number of objects classified per second is calculated.
Dual-task: The patient is instructed to perform both tasks simultaneously, by walking “as fast as possible without compromising safety” and classifying “as many objects as possible” (i.e. new objects from the standardized list). The TUG task is calculated following the same procedure as in the single-task condition and the number of classified objects per second is counted and calculated within this timespan. The absolute dual-task cost is calculated for both tasks as dual-task performance − single-task performance. The relative dual-task cost is calculated as dual-task performance − single-task performance)/single-task performance * 100%.
Theoretically nine outcomes are possible for this paradigm: A negative, positive or no interference on one, or both tasks.
In the DBAR approach, only the dual-task cost of the motor task is applied for determine the patient´s relative performance of cognitive-motor interaction. But for evaluating change, dual-task cost of both motor and cognitive tasks must be regarded.
The standardized list of objects can be accessed here.