I'm currently investigating the following "To what extent do fit influencers have an effect on product attitude and purchase intention? And to what extent does parasocial interaction moderate this relationship?"

Now, more specifically It's about food marketing (healthy products) using influencers on Instagram.

As agreed with my supervisor I will create my stimuli based on a post from a "real" and "fictitious" fit influencer who will post on Instagram and describing and endorsing a product. However, I'm a bit confused how I can manipulate real vs. fictitious fit influencers?

I'm assuming I can use a real fit influencer (see image attached), but how would the fictitious look like? Do I use a non fit influencer for instance using a self portrait (see attached) of someone and just say that she's an influencer ? or do I use the same image for both and show the difference in another way?and if so how?

Thank you in advance!!