Effects of Importance and Detectability of Usability Problems on Sample Size Requirements.
April SavoyYinni GuoGavriel SalvendyPublished in: Int. J. Hum. Comput. Interact. (2009)
Keyphrases
- sample size
- usability problems
- model selection
- upper bound
- random sampling
- heuristic evaluation
- statistical power
- small sample
- usability testing
- south african
- small samples
- variance reduction
- worst case
- progressive sampling
- statistical hypothesis testing
- cognitive style
- random sample
- evaluation methods
- design principles
- np hard
- digital libraries
- feature selection
- information retrieval
- data sets