Reply #8: Let's avoid confusion

[kristopher]

I put "argument" in quotes because it has multiple meanings that shouldn't be confused.

ar·gu·ment Noun/ˈärgyəmənt/
1. An exchange of diverging or opposite views, typically a heated or angry one: "I've had an argument with my father".
2. A reason or set of reasons given with the aim of persuading others that an action or idea is right or wrong.

Your first post referred to def. #1; your header in the second post would be the study authors' "argument" as described in def. #2.

What you seem to be doing is carrying the conversation forward and beyond the OP by asking a question the study doesn't address, "Which problem solving strategy is most effective?"