A lot of people don't know the relation between colors and the mind, body and emotions. Thus the most essential features of consumer psychology from a marketing point of view are — creating the need for consumerism or for a specific product by advertising specific and unusual features of the product, developing the association between brands and products and offering attractive options such as discounts and sales to attract not just more consumers but also more sales.

With advertising becoming a business in itself, the methods of using advertisements became even more formalized, controlled and systematic and the advertisements for products started appearing as newspaper ads, on billboards, hoardings, as handbills, leaflets, on magazines, newspapers, on TV and radio as commercials and more recently on the internet.

The terms 'intra-cultural' and 'inter-cultural' psychology would be more conducive to finding a psychology that shows convergent patterns of cultural behavior among people across societies. Cross-cultural psychology focuses on finding universal patterns of behavior or beliefs that are common among people of all cultures and this is what has been described here as 'inter-cultural' psychology.

The methods of communication are also equally interesting as humans communicate through the written word and the spoken word and through letters, messages, phone calls, personal face to face conversation, through glances and physical contact, through sex, and on a wider scale through seminars, conferences, news events, newspapers, press releases, books, brochures, and campaigning or propaganda.

If you are even selling to the Asian culture in the United States, the colors will change. Instead of examining human nature and the mind from within, psychology now switched from examining human nature and mind from without. Take classes in business psychology, interpersonal skills, or even classes that can help you work through shyness.