The critique is found at: http://www.amsciepub.com/doi/abs/10....urnalCode=pr0&
"If two individuals perceive a situation to be the same, what produces differences in behavior? Using the statements above, we would conclude that they must have different dispositions or preferences for certain behaviors. Personality theory suggests that the two may have different personality preferences which influenced behavior."
Which "statements above" is the author of this critique referring to?
He is referring back to the distinction made previously in the article between dispositions and situations - simply, an external situation can have a stronger influence on behavior than internal disposition.
But don't some people simply have a disposition to being more strongly influenced by situations? Of course they do - or else some people are no better than robots reacting to their environments. Internal disposition is therefore always to be the primary object of study in personality research, although it is often seen only indirectly, through speech and behavior.
The dichotomy or distinction created by the critique's author is thus a flawed one. The author's critique of the MBTI is therefore also flawed because it is based on an invalid dichotomy.