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Fitts' List

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Amber Scott

on 26 March 2014

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Transcript of Fitts' List

Fitts' List
Function Allocation
Fitts introduced a method for function allocation in his research on human engineering for air-navigation and traffic-control systems in 1951.
The aim is to identify the limitations and capabilities of both human and machine to determine the optimum division of responsibility.
Fitts' List - Humans
1. Ability to detect small amounts of visual or acoustic energy
2. Ability to perceive patterns of light or sound
3. Ability to improvise and use flexible procedures
4. Ability to store very large amounts of information for long periods and to recall relevant facts at the appropriate time
5. Ability to reason inductively
6. Ability to exercise judgement
Human Factors
"Human factors refer to environmental, organisational and job factors, and human and individual characteristics, which influence behaviour at work in a way which can affect health and safety"
(Health and Safety Executive).
By Amber, Alice, Alan, Ashleigh and Amy
TASKS
Listen to the two clips..
Clip A or Clip B
Which one is easier to understand?

Can you work out which is from a computer and which is by a person?
Work out these problems:
Work out these problems:
1. 5 x 48 - 4 = ___
2. 368,154 - 267 = ___
3. 72 ÷ 8 + 129 = ___
Fitts' List - Machines
1. Ability to respond quickly to control signals and to apply great force smoothly and precisely
2. Ability to perform repetitive routine tasks
3. Ability to store information briefly and then erase it completely
4. Ability to reason deductively including computational ability
5. Ability to handle complex operations i.e. to do many different things at once

Other Research
claims that there are tasks that neither machines nor humans can do well and tasks that machines and humans both do well.
Disadvantages
Simplistic
Organizational and cultural issues
Shouldn't be used as the sole basis
Treats the operator’s tasks as independent modules
Conclusion
'Fitts’ List is a useful theory but not a practical method’
Fuld (2000)
Advantages
It’s a convenient framework for considering the allocations of functions
It aids people who are unfamiliar with human factors to think systematically about the functions assigned to human operators
References
de Winter, J. C. F., Dodou, D. (2014) Why the Fitts list has persisted throughout the history of function allocation. Cogn Tech Work. 16:1. p 1-11

Fuld RB (2000) The fiction of function allocation, revisited. International Journal of Human Computer Studies 52:217–233 p. 231

Fitts, P. M., (Ed.). (1951). Human Engineering for an effective air-navigation and traffic-control system. Columbus Ohio: Ohio State University Research Foundation

Liu, F., Zuo, M., Zhang, P. (2011). HUMAN-MACHINE FUNCTION ALLOCATION IN INFORMATION SYSTEMS: A COMPREHENSIVE APPROACH. Proceedings of The 15th Pacific Asia Conference on Information Systems. Retrieved from http://melody.syr.edu/pzhang/publications/PACIS_11_Liu_etal_FunctionAllocation.pdf

Price. H.E. (1985). The Allocation of Functions in Systems. Human Factors, 27 (1), 33-45

Jordan. N. (1963). Allocation of functions between man and machines in automated systems. Journal
of Applied Psychology, 47(3), 161-165.
Price Decision Matrix
Fitts (1951)
Fitts (1951)
Fitts (1951)
PRICE (1985)
JORDAN (1963)
pointed out that men and machines are complementary rather than comparable.
(Liu, Zuo, and Zhang (2011))
Full transcript