This is really weak. Announcing a goal to friends and peers is vastly different than talking about it for a second to an interviewer. The sample sizes were unimpressive and the domain far too specific (only students, and at that only psychology and law students) for me to think this is worth generalizing or even strongly updating on. The 4th study is the most interesting one because it directly tests the underlying assumption, and supports it, but with a sample of 24 law students this isn't strong evidence.