Craig’s Musings

The following bins of responsiveness (i.e. response times) based on HCI research at Carnegie Mellon University resonnate with me:

• Crisp: < 150 ms;
• Noticeable to annoying: 150 ms to one second;
• Annoying: one to two seconds;
• Unacceptable: two to five seconds; and
• Unusable: > five seconds.

The context in which these bins were described appears in the March 2006 issues of IEEE Computer: “Quantifying Interactive User Experience on Thin Clients.”