This question relates to the US guidelines (I am conducting an online experiment from abroad).
In the experiment, I would like to look at consumer switching cost in different psychological states. In order to measure the switching cost, I am planning to replicate Jiang et al. (2014) where they gave the respondents the possibility to choose from 4 brands of chocolate bars and then tested how varied their choices were (= whether they always picked the same brand or were more varied in their choices).
If I want to replicate the study, can I use pictures of the products (brand visible) in an online experiment or should I contact the company behind each brand to ask for consent?