There is a tool that can help you "read" people and determine if they are in the D, i, S, or C mode when communicating with you. Here's what you do:
First ask yourself: Is this person Active (fast paced, assertive, dynamic, bold) or Thoughtful (moderate paced, calm, methodical, careful)?
Next ask: Is this person Questioning (logic focused, objective, skeptical, challenging) or Accepting (people focused, empathizing, receptive, agreeable)?
With these two questions answered, you can identify which of the DiSC modes the person is operating from.
The D or dominant mode is represented by the person who is both Active and Questioning.
The i or influencing mode is represented by the person who is both Active and Accepting.
The S or steady mode is represented by the person who is both Accepting and Thoughtful.
The C or conscientious mode is represented by the person who is both Questioning and Thoughtful.