In Bipolar disorder, time and multiple interactions with a client can be a great way to determine if a particular behavior was just a "one-time"

In Bipolar disorder, time and multiple interactions with a client can be a great way to determine if a particular behavior was just a "one-time" thing, or a pattern of behavior that exists over time and multiple contexts. What are some other disorders where interactions over time might help you to be more comfortable with giving a diagnosis?