| Number of experimenter |
E-2012A |
Protocolo |
Guías de experimentación |
There was an experimenter (clients) |
There were two experimenters (clients) |
Alleviate the effects of fatigue and learning of the experimenter |
| Number of problems |
E-2012A |
Protocolo |
Diseño experimental |
There was only one problem |
There were two problems |
Use two problems due to the new design and the blocking variables |
| Interview duration |
E-2012A |
Protocolo |
Guías de experimentación |
The duration of the interviews was 60 minutes |
The duration of the interviews was 30 minutes |
The interviews were individual |
| Time of consolidation |
E-2012A |
Protocolo |
Guías de experimentación |
The subjects (analysts) had 30 minutes to report the requirements (consolidation time) |
The consolidation time was 90 minutes |
More time available for reporting requirements |
| Problem difficulty |
E-2012A |
Operacionalización |
Tratamiento |
The difficulty of the problem was not measured |
The new variable 'problem difficulty' is defined |
Analyse the influence of the difficulty of the problem on the results |
| New problems |
E-2012B |
Protocolo |
Material experimental |
Two problem domains were used, one known domain and one unknown domain |
The problems have been changed although they are still known domain and unknown domain |
Using different problems for requirements analysis |
| Order of problems |
E-2012B |
Protocolo |
Guías de experimentación |
First the known domain problem was performed and then the unknown domain problem |
The order of the problems was swapped |
Analyse whether it affects the results |
| Timing of the experiment |
E-2012B |
Contexto |
Time of performance |
The experiment was carried out at the beginning of the course |
The experiment was carried out after the subjects have received training in requirements engineering |
Analyse whether it affects the results |
| Inter-subject design |
E-2013 |
Protocolo |
Diseño experimental |
The design was of repeated measurements |
The design was between-subjects |
Avoiding the learning effect |
| Previous training |
E-2013 |
Operacionalización |
Tratamiento |
There was no short training (warm-up) before the course |
Short training (warm-up) was 1 week |
To analyse the effect of training |
