A Mobile Application That Allows Children in the Early Childhood to Program Robots

Table 5

Usability goal outcomes.

Usability attribute	Usability goal	Usability outcome
Learnability	Average time to complete a challenge the first time = 11.7 minutes (between 10 and 30 minutes)	Successful
	Average time of training = 30 minutes (between 30 and 60 minutes)	Successful
Efficiency	Percentage of successful challenges = 33% (>70%)	Unsuccessful
	Average time to complete one challenge = 11.6 minutes (between 10 and 20 minutes)	Successful
Memorability	Percentage of correct answers about the application = 93% (>80%)	Successful
Errors	Average of errors = 4.3 (between 5 and 10 errors)	Successful
	Average recovery errors = 0.7, 16% of total errors (>60%)	Unsuccessful
Satisfaction	Like = 100% (>65)	Successful
	Easy = 64% (>65)	Unsuccessful