Adler is built upon Imagination
Meisner is built upon Immediate Experience
Strasberg (Method) is built upon Sense Memory
British is built upon Observation
"The Meisner system seems to produce actors that pay attention to their partner better. Some of the basic Meisner exercises include the YES/NO and various repetition and back-and-forth exercises that tend to 'bond' the actors together. "Acting is living life truthfully under imaginary circumstances". "The emotional life of a scene is a river and the words are the boats".
"The Strasberg system or METHOD system tends to produce actors that are a bit more tightly wound. The system is based on SENSE MEMORY, which is the process of recalling all of the attributes of an object, and EMOTIONAL MEMORY which is the process of recalling significant events and situations from the actor's past.
"Stella Adler gives us the process of action verbs and is based on imagination as being the best motivation for a good performance. The imagination is very powerful in the presence of a director who loves to tell stories. " Get the verb of it, don't worry about the emotional thread".
"The British approach to acting is an odd one. Not that it doesn't generate spectacular performances or consummate actors, but rather is based on the actual achievement of acting. Rather than becoming the character emotionally or mentally, the British system actually emulates a character by adopting all of the physical traits and characteristics."
Let me jump in: the Brits get their character's voice and walk, for example, and then let loose their imagination. This approach has been described as "outside-in"and probably appeals to actors who, like me, are "thinkers" rather than "feelers."