Usability Barriers for Elderly Users in Smartphone App Usage: An Analytical Hierarchical Process-Based Prioritization

Table 4

Articles’ selection using the tollgate approach.

Databases	Ph1	Ph2	Ph3	Ph4	Ph5
ACM digital library	831	250	119	17	15
IEEE Explorer	585	160	24	12	8
Science Direct	341	205	164	35	12
Google Scholar	33	29	21	21	15
Springer	140	70	72	5	3
Total papers	1930	714	400	90	53