The Assimilation-Contrast Effect is grounded in Social Judgement Theory, developed by Muzafer Sherif and his wife, Carolyn Wood Sherif, in the 1960s.
According to Muzafer, when a potential issue of conflict arises, people - individual or group - approach it with one of 3 'latitudes':-
# Latitude of Acceptance: - consists of the information you find pleasing and acceptable
# Latitude of Rejection: - consists of the information you find objectionable
# Latitude of Noncommitment: - consists of information you find neither pleasing nor objectionable
The key to which latitude information fell into would depend on the level of ego involvement - ie: how important the issue was to you personally.
Muzafer found that working in the Latitude of Acceptance led to what he called an 'assimilation effect' - ie: you will find to some degree acceptable information that is not really that close to what you believe. On the other hand, when working in the Latitude of Rejection, there is a 'contrast effect' - ie: you find unacceptable even information that is fairly close to what you believe.
Don Beck, who had studied under Muzafer and was closely involved in the work from which Social Judgement Theory was developed, realised, from his ongoing work in conflict situations like Apartheid South Africa, that there was a second (though closely-related) factor to ego involvement: vMEMES.
Not only do some vMEMES tend to a contrast effect while others tend to an assimilation effect, but this can even be mapped to vMEME Transition Stages. Indeed the moment when contrast starts to give way to assimilation occurs with the transition from BLUE to ORANGE.
The graphic below - which names the stages in terms of conflict management - shows the Assimilation-Contrast Effect creating errors in how closely you perceive other people's positions to your own.
At one extreme RED has a 'my way or the highway' approach to any dissident information - thus classifying close-but-not-totally-agreed allies on a similar level to outright opponents. At the other extreme the emergence of GREEN leads to a search for a liveable-with concensus.
Of course, there is the caveat that GREEN can flip totally if the information it receives is implacably opposed to its values such as egalitarianism and humanity. In which case, you are much more likely to see BLUE or possibly even RED replace its dominance in the vMEME Stack you are dealing with!
For validation purposes, it should be noted that the descriptions Beck attaches to his styles match very closely to the conflict management styles identified by Robert Blake & Jane Mouton in their seminal works on the subject - their work being largely verified by the work of Ken Thomas & Ralph Kilmann!
The match is:-
Flameththrower - Control (Direct & Dominate) (Blake & Mouton) - Competition (Thomas & Kilmann)
Zealot - Paternalism (Prescribe &
Guide) (Blake & Mouton)
Idealogue - Compliance (some aspects) (Blake & Mouton) - Accommodation (some aspects) (Thomas & Kilmann)
Moderate -
no match
Pragmatist - Opportunist (Exploit & Manipulate) (Blake & Mouton)
Conciliator - Compromise (Blake &
Mouton and Thomas & Kilmann)
As he was drawing primarily from matching the research of Clare W Graves to his own experiences, Beck's work does not describe how the Assimilation-Contrast Effect affects PURPLE or nodal GREEN. However, from the work of Blake & Mouton and Thomas & Kilmann, it is possible to classify:-
PURPLE - Indifference (Avoid & Elude) (Blake & Mouton) - Avoidance (Thomas & Kilmann)
However, if the tribal/clan/family/grouping is threatened,then PURPLE is likely to go from outright Avoidance to outright contrast - eg: 'not of my tribe'.
GREEN - Compliance (other aspects) (Blake & Mouton) - Accommodation (other aspects) (Thomas & Kilmann)
The Blake & Mouton version strongly emphasises that people matter more than results. In other words, almost total assimilation!
The caveat in all these matches is that Blake & Mouton and Thomas & Kilmann are describing behavioural outputs while Beck is drawing on Graves' motivational systems.
When it comes to 2nd Tier, Beck seems to see no need to talk of the Assimilation-Contrast Effect. However, it is worth noting that Blake & Mouton see the most desirable-but-difficult-to-achieve style as Sound (Contribute & Commit) and Thomas & Kilmann see it as Collaboration. While it is difficult to be precise because there is so little reliable information, about the the 8th vMEME, it would appear that Blake & Mouton and Thomas & Kilmann are talking about behaviour that is perhaps better ascribed to TURQUOISE than to YELLOW. In any case, it is abundantly clear that attitudes towards issues are quite different in the 2nd Tier where, according to both Graves and Abraham Maslow, the delusions of the subsistence/deficiency ways of thinking drop away.
Returning to Muzafer Sherif's original proposition, it is possible to see that, under normal-ish (as opposed to extreme) circumstances, RED and BLUE might be substantially prone to ego involvement - with a high investment in self |(RED) or the mythical 'higher authority' (BLUE) wheras ORANGE and GREEN are more capable of considering a wider range of views.
Click here to learn about Integrated SocioPsychology open workshop programmes, some of which deal with the Assimilation-Contrast Effect.