The social class structure can cover a range from two to nine classes. A frequently used classification divides them into five groups: high, medium high, medium, medium low, low. The profiles of each of these classes indicate that socioeconomic differences are reflected in differences in attitudes, in leisure activities, and in consumption habits.
The investigation revealed differences between the classes in terms of clothing habits, home decoration, telephone use, use of free time, preference of places to buy and habits of saving, spending and use of credit.
A very simple process of the structure and operation of memory suggests the existence of three storage units:
• Sensory • Short term • Long term