The dichotomies are a "20,000 foot view" of needs and preferences. They are:
• Introvert vs Extravert - Do you prefer your inner or outer world?
• Sensor vs iNtuitor - Do you look for what's reliable, or do you seek patterns?
• Thinker vs Feeler - Is human impact most important, or just one factor in a decision?
• Judger vs Perceiver - Where do you need freedom, where do you need organization?
These are simple, but accessible, ways to understand each partner's needs and attributes.