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Response Time - Coggle Diagram
Response Time
Response Time Study Conclusions
The optimum is dependent upon the task
Satisfaction is a function of expectations
Dissatisfaction is a function of one’s uncertainty about delay
People will change work habits to conform to response time
Constant delays are preferable to variable delays
More experienced people prefer shorter response times
Very fast or slow response times can lead to symptoms of stress
Web Response Time Study Conclusions
Bouch, Kuchinsky, and Bhatti (2000)
High (Good): Up to 5 seconds
Average: From 6 to 10 seconds
Low (Poor): Over 10 seconds
Longer delay times are tolerated by:
Novice users
Older users
People not experienced with high bandwidth connections
New visitors to a site
People performing important tasks
People performing successful tasks
Better content
Perceived delays in presentation causes sites to be evaluated as:
Less interesting
Possessing lower quality content
Interfering with task continuity and flow
Less remarkable
Less secure
Exceeding slow sites can lead people to believe they made an error
In general studies seem to indicate that:
The same factors affecting optimum computer response times in general also operate in the world of the Web
Longer downloading times may be more readily accepted due to the graphical nature of the Web’s content
Other factors have influences as well:
User age
Page content quality
Success in task performance
Differing user expectancies
System responsiveness should match the speed and flow of human thought processes
Less than 1-2 seconds: If continuity of thinking is required and information must be remembered through several responses
2 to 4 seconds: If human task closures exist, high levels of concentration are not necessary, and moderate short-term memory requirements are imposed
Within 4-15 seconds: Acceptable if major task closures exist, minimal short-term memory requirements are imposed.
More than 15 seconds: Acceptable when the user is free to do other things and return when convenient