Measuring age differences in executive control using rapid motor decisions in a robotic object hit and avoid task

Area of Science:

• Neuroscience
• Cognitive Psychology
• Gerontology

Background:

• Assessing age-related executive control decline is challenging due to confounding sensorimotor processes in traditional tests.
• Rapid motor decision-making tasks offer a potential method to isolate cognitive from sensorimotor contributions.

Purpose of the Study:

• To evaluate age differences in perceptual-motor, coordination, and cognitive measures using object hit (OH) and object hit and avoid (OHA) tasks.
• To determine if cognitive contributors in OHA tasks correlate with executive functioning.

Main Methods:

• Administered OH and OHA tasks to younger and older healthy adults.
• Utilized the robotic manipulandum for precise measurement of motor and cognitive performance.
• Assessed executive functioning using the Trail Making Test (TMT) Parts A and B.

Main Results:

• Age differences were most pronounced in cognitive measures after controlling for hand movement speed.
• Smaller age differences were observed in perceptual-motor speed and sensory measures.
• Minimal age differences were found in bimanual and spatial coordination, with cognitive measures correlating with TMT executive functioning scores.

Conclusions:

• Rapid motor decision-making tasks are sensitive to age-related executive control differences.
• These tasks can effectively distinguish cognitive from sensorimotor contributions to performance, aiding in understanding healthy aging.