Inspec keywords: psychology; computer games; learning (artificial intelligence); human factors; medical robotics; patient rehabilitation; skin

Other keywords: POSM; easier difficulty levels; physiological measures; dynamic difficulty level adjustment algorithms; adaptive task difficulty level adjustment techniques; 20 healthy subjects; appropriate exercise difficulty level; dynamic difficulty adjustment mechanism; individual adaptively; subjective ratings; rehabilitation tasks; increment/decrement one level; task engagement; computer-based fruit picker game; robot-assisted rehabilitation system; adaptive difficulty adjustment; adaptation algorithms

Subjects: Biological and medical control systems; Patient care and treatment; Robotics; Knowledge engineering techniques; Other topics in statistics; Computer games; Biology and medical computing; Patient care and treatment