There is, for example, a peculiar breed of psycholinguist who is suspicious of any suggestion that language is not the pinnacle of evolution and the entire point of the human brain (such individuals can often be found at conferences in those talk sessions that see little passing traffic through the doors). In a very distant corner of this metaphorical conference from hell, there are also some antisocial social psychologists who prefer to talk loudly about how utterly pointless it is to study human cognition without taking interaction into account. If it weren't for the huge chip on their shoulders, they might find out that not everyone disagrees with them. Peering superciliously at passers-by from the conference bar are the clinical psychologists who like to condescend in conversation because, obviously, working with non-patient groups is so trivial. At the other end of the bar are the über-logical reasoning people, who firmly believe that humans are all rational agents despite the behaviour at play around them.
It's not subfield-specific, of course. A closer look at the conference floor will reveal methodology subgroups. You have the raters, who will trust a consistent difference of opinion over a 30 ms response time difference any day of the week. They don't talk much to the milliseconders, who look askance at anything as subjective as ratings on a Likert scale. Different groups of cognitive neuroscientists make snide comments at each other about who has the biggest, shiniest, most expensive machine, but nobody else is really paying them any attention. And then you have the Luddites, who are always one or two steps behind the particular technological advances of the moment. When software made it possible to randomise trials, they stuck adamantly to blocked designs; when neuroimaging began to be used in their research area, they refused to cite anything beyond behavioural experiments. Most people tend to leave them to cite each other.
While the aforementioned groups are all very real, they are, thank the great flying spaghetti monster, a definite minority. Most psychology academics are happy to acknowledge that their way is not the only/best way to study the science of the mind. But my rather varied background has left me with a very "big-picture" view of research.
All is one. Well, almost. I can make most people's research topic somehow relevant to what I do (a sanity-saver in conferences when choosing a talk based on title alone has horribly backfired). The downside is that the narrowmindedness I sometimes encounter leaves me frustrated and incredulous.
Psychological science should not be insular.
And it should not be possible to build a successful career with that attitude, but that notion will have to wait until I rule the world.

