I wonder if you would like to see an AB test though? I haven't read any of the other comments in this thread yet, so stop me if you already answered that.
You also missed my point that IKEA effect is not necessarily a "gratuitous" assembly step, just any step(s) at all.
You also missed my point that IKEA effect is not necessarily a "gratuitous" assembly step, just any step(s) at all.