It does address the potential role of a number of biases, including self-deception / rationalising. As a result it compares responses against third party assess

It does address the potential role of a number of biases, including self-deception / rationalising. As a result it compares responses against third party assessments (finding little evidence of self-deception being a major factor). I agree that decisions aren't typically binary but I suppose even if you are actively researching after 6 months, for the purposes of this comparison you have remained with the status quo.