Summary of results, hypotheses testing and findings
| Hypothesis | Formulation | Result | Practical findings |
|---|---|---|---|
| H1a | Ad attitude Instagram Stories > Facebook Wall | Supported | Attitude toward ads is higher in Instagram Stories than in Facebook Wall and Instagram Wall |
| H1b | Ad intrusiveness Facebook Wall > Instagram Stories | Not supported (opposite effect) | Intrusiveness perception toward ads is higher in Instagram Stories than in Facebook Wall and Instagram Wall |
| H1c | Ad loyalty intentions Instagram Stories > Facebook Wall | Not supported | Please see H2c, H3c and post hoc c |
| H2a | H1a is higher for millennials than for non-millennials | Not supported | Please see H1a |
| H2b | H1b is higher for millennials than for non-millennials | Supported | Ad intrusiveness in different social media depends on age. In particular, millennials perceive ads on Facebook Wall as more intrusive |
| H2c | H1c is higher for millennials than for non-millennials | Supported | Loyalty toward ads in different social media depends on age. In particular, millennials are more loyal to ads in Instagram Wall |
| H3a | H1a is higher for women than for men | Not supported | Please see H1a |
| H3b | H1b is higher for women than for men | Not supported | Please see H1b and H2b |
| H3c | H1c is higher for women than for men | Supported | Loyalty toward the ad in different social media depends on gender. In particular, men are more loyal to ads in Facebook Wall |
| Post hoc a | H1a is simultaneously affected by age and gender | Not supported | Please see H1a |
| Post hoc b | H1b is simultaneously affected by age and gender | Not supported | Please see H1b and H2b |
| Post hoc c | H1c is simultaneously affected by age and gender | Supported | Loyalty toward ads is influenced by the interaction between social media format, age, and gender. Facebook Wall increases loyalty among non-millennial men. Instagram Wall increases loyalty among millennials of both genders. Instagram Stories increases loyalty among millennials of both genders and non-millennial women |
| Hypothesis | Formulation | Result | Practical findings |
|---|---|---|---|
| Ad attitude | Supported | Attitude toward ads is higher in Instagram Stories than in Facebook Wall and Instagram Wall | |
| Ad intrusiveness | Not supported (opposite effect) | Intrusiveness perception toward ads is higher in Instagram Stories than in Facebook Wall and Instagram Wall | |
| Ad loyalty intentions | Not supported | Please see | |
| Not supported | Please see | ||
| Supported | Ad intrusiveness in different social media depends on age. In particular, millennials perceive ads on Facebook Wall as more intrusive | ||
| Supported | Loyalty toward ads in different social media depends on age. In particular, millennials are more loyal to ads in Instagram Wall | ||
| Not supported | Please see | ||
| Not supported | Please see | ||
| Supported | Loyalty toward the ad in different social media depends on gender. In particular, men are more loyal to ads in Facebook Wall | ||
| Post hoc a | Not supported | Please see | |
| Post hoc b | Not supported | Please see | |
| Post hoc c | Supported | Loyalty toward ads is influenced by the interaction between social media format, age, and gender. Facebook Wall increases loyalty among non-millennial men. Instagram Wall increases loyalty among millennials of both genders. Instagram Stories increases loyalty among millennials of both genders and non-millennial women |