Review Article
A Systematic Review of Modifications and Validation Methods for the Extension of the Keystroke-Level Model
| RQ# | Research question | Answer |
| RQ1 | What was the purpose of extending the KLM? | | RQ1 | What was the intended device and setup? | | RQ1 | What was the application domain? | | RQ1 | Who were the intended users included in the experiment? | | RQ2 | What research method was used to extend the KLM operators or modify heuristics? | ○ Experiment | | | ○ Literature | | | ○ Observation | | | ○ Other | RQ2 | What research method was used to extend the KLM operators’ unit times? | ○ Experiment | | | ○ Literature | | | ○ Observation | | | ○ Other | RQ2 | What were the users’ skill levels? | | RQ3 | How was the original KLM extended? | ○ KLM operators preserved | | | ○ KLM operators discarded | | | ○ Adapted operators | | | ○ New operators | | | ○ New equations | | | ○ Updated heuristics | | | ○ Application metrics | RQ4 | What research method was used to validate the extended KLM? | ○ Experiment | | | ○ Literature | | | ○ Observation | | | ○ Other | RQ4 | How was performance measured? | ○ Correlation analysis | | | ○ RMSPE | | | ○ MAPE | | | ○ Other | RQ4 | What was the overall performance of the extended KLM? | | RQ4 | Was the performance of the extended KLM better than that of the original? | ○ Better | | | ○ Worse | | | ○ Unclear | | | ○ Not measures | | | ○ Other |
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