I am editing a paper to comply with APA 6th edition standards for credits, citations, and references. But the situation described next is new to me, and I could not find a satisfactory answer in the manual.
The researcher invented a game specifically for the study. The game involves props that the researcher also invented (i.e.,as part of the game invented for the study).
The author did disclose that the game was invented for the study. However, because this game could be used for commercial or charitable purposes, it "feels like" it has an intellectual property aspect to it where the author should be credited at one or more places within the manuscript and not just on the title page.
For example, the paper has a picture of the props, but no credit. Should there be a credit, and what does it look like?
Similarly, should there be a citation (where?) and a reference for the game (what does it look like)? Currently there is no citation.