What are your thoughts on the "rest" of Frederickson's research? You seem content to debunk only Losada's math (charitably characterized as a "brain fart"), where this article seems more willing to lambast positivity research on the whole as self-serving mumbo-jumbo.
At the time that interview was published I didn't know too much about it. Since then I have published about 5 articles critiquing various other work from the same lab. It mostly seems very weak, but I'm not sure if it's any worse than most of research in the wider field of social psychology (and peripheral subfields that use similar underpowered research methods). For example, I have also been involved in looking at the work coming out of the Cornell Food and Brand Lab (GIYF) and much of that seems to be catastrophically bad.
