Within each of these ego states are subdivisions. Thus Parental figures are often either more "nurturing" (permission-giving, security-giving) or more "criticising" (comparing to family traditions and ideals in generally negative ways); Childhood behaviours are either more natural ("free") or more "adapted" to others. These subdivisions categorize individuals' patterns of behaviour, feelings, and ways of thinking, which can be functional (beneficial or "positive") or dysfunctional/counterproductive ("negative"). Berne states that there are four types of diagnosis of ego states. They are: "behavioural" diagnosis, "social" diagnosis, "historical" diagnosis, and "phenomenological" diagnosis. A complete diagnosis would include all four types. It has subsequently been demonstrated that there is a fifth type of diagnosis, namely "contextual", because the same behaviour will be diagnosed differently according to the context of the behaviour. Ego states do not correspond directly to Sigmund Freud's ego, superego, and id, although there are obvious parallels: Superego/Parent; Ego/Adult; Id/Child. Ego states are consistent for each person, and (argue TA practitioners) are more observable than the components of Freud's model. In other words, the ego state from which someone is communicating is evident in his or her behaviour, manner and expression. Emotional blackmail is a term coined by psychotherapist Susan Forward, about controlling people in relationships and the theory that fear, obligation, and guilt (FOG) are the transactional dynamics at play between the controller and the person being controlled. Understanding these dynamics are useful to anyone trying to extricate from the controlling behavior of another person, and deal with their own compulsions to do things that are uncomfortable, undesirable, burdensome, or self-sacrificing for others. Forward and Frazier identify four blackmail types each with their own mental manipulation style: There are different levels of demands—demands that are of little consequence, demands that involve important issues or personal integrity, demands that affect major life decisions, and/or demands that are dangerous or illegal. When Will Hunting from the movie Good Will Hunting is being choked by Sean Maguire, you can see the spine of the book "I'm OK, You're OK" in the bookcase that Will is being pinned against   Thomas Harris's successful popular work from the late 1960s, "I'm OK, You're OK", is largely based on transactional analysis.