Background: There is Little reported information on psychomotor perfor
mance in relation to minimal access surgery (MAS). Methods: A micropro
cessor-controlled endoscopic psychomotor tester (the Dundee Endoscopic
Psychomotor Tester-DEFT) has been developed to evaluate psychomotor a
spects of MAS. Experiments were conducted on 20 medical undergraduates
to evaluate accuracy and reliability of the tester. Results: The stud
y demonstrated a significant difference between subjects (p < 0.01). I
t also identified three individuals who enacted 16, 22, and 40 errors
while the majority (85%) sustained less errors with a median of 4.5. C
onclusions: DEFT provides a standard, reproducible, objective real-tim
e scoring system. It identifies individuals who cannot adjust to endos
copic viewing and therefore manipulate from endoscopic images.