I have a personal relationship with a psychology professor. We have 2 situations where I may have some claim on authorship but I'm not confident.
I was a participant in a research project in the spring semester. Due to my performance, I was asked to continue. The theory behind the research is that getting 2 types of training will improve learning of a specific task. Each session, I received both types of training.
He wasn't happy with the data from the spring semester. After spending hours looking at the data, he found some way to eek out an abstract. As we continued, I started to realize that although my performance varied from session to session, I either increased or decreased on both tasks. In other words, I thought that if I did better with Training A on Tuesday, I also did better on Training B. If I did worse on Wednesday, I would do worse on both tasks.
I told him about this. He looked at those particular data and I was right. There was a clear correlation. Within a few hours, he was saying it would be publishable.
My contention is that he provided the theory for the study but I proposed the hypothesis. He said "You don't think I would have eventually looked at that?" Then I pointed out that he hadn't looked at those data when he was struggling for an abstract. He says I'm just a subject who provided feedback but I did more than that. I predicted the correlation between specific data.
He's been working on a book chapter. His original plan was to write about his subject from the perspective of a different branch of psychology, one in which I hold a masters. His original interpretation was not good and I told him. We spent hours discussing this. I found the main reference on which he is basing this claim. Also, I spent hours teaching him the principles of my area. I gave him the interpretation from the perspective of my discipline which is the point of that section of the chapter.
He had me read the relevant part of the chapter. I found it confusing. He failed to explain some things and implied information that was incorrect. Also, he explained things in an order that would leave the reader confused. He was frustrated because he had not planned to rewrite that section but said "You're right." To be helpful, I sat down and wrote that section myself. Initially, I had given him an example that I'd heard elsewhere. This time, I included a new example that explained things more clearly. I shared the document online and he continued working.
A few hours later we were discussing it and I asked if he was using my new example. He said "No, because I don't want to give you a co-authorship." I was stunned. It's one thing not to give me credit but he is going to a great deal of trouble to avoid crediting me. Later he said he was excited for me to see the acknowledgement.
Yes, I should have discussed authorship with him before making these contributions. Setting that aside, do I have a claim to anything beyond an acknowledgement? I feel like I made "significant intellectual contributions" to both. The study has not been written but I provided a lot of the material for the chapter.