Psychology Essay Example | Topics and Well Written Essays - 750 words - 15

Psychology - Essay Example This model of memory remained under extensive research in the following years. The physical growth in size of cerebrum and the number of functions associated with this evolved cerebrum demonstrates an important step in the evolutionary ladder of natural life. Memory is one of the very complicated functions of complex life forms and this complexity reaches its maximum when Homo sapiens are analyzed. Atkinson-Shiffrin model of memory is an attempt to explain the various processes of memory which continue to operate in our brains. The first level of memory is identified as sensory memory. No matter which kind of stimulus is applied to the various senses of the body, the form of information that is delivered to the central nervous system is in the form of electrical impulse or the so called ‘nerve impulse’. For the purpose of translation of external stimuli, a number of receptors are present in the body, that continuously receive impulses in the form of vibration, sound, pressure, light and so on. These impulses are translated into electrical nerve impulses by their respective receptors and are then delivered to the brain as electrical signals. This sensory memory has a very short life span and it persists for only a few seconds i.e 2-3 seconds. The stage between sensory memory and long term memory is called short term memory. Certain chunks of information from sensory memory are shifted to short term memory which is also called working memory because the information stored there needs further processing. Short term memory easily fades away as soon as attention is drawn to any other matter; it lasts for only 18 to 20 seconds unless the information is rehearsed. Any information that is not lost after 18 to 20 seconds is transferred to long term memory. The capacity of short-term memory is limited and it is for this reason that only a small amount of information can be retained in short-term memory

History - United States History 1865 Essay Example | Topics and Well Written Essays - 750 words

History - United States History 1865 - Essay Example Expansion of Cuban sugar industry had then brought a measure of prosperity and a dwindling of the independent movement. But a change in American tariff policies in 1894 affected the Cuban sugar market and brought hard times, unemployment and a renewal of hostilities in early 1895. Spanish government sought to introduce reforms in Cuba on the diplomatic demand of U.S, just when the controversy seemed to be quieting and the U.S battleship 'Maine' was sunk. Despite frantic Spanish efforts to prove that the Spanish government had no part in the sinking, and new diplomatic concession, the U.S Congress started the demand of Spain quitting the island altogether. War was the result. Throughout the nineteenth century U.S had pursued the policy of expansion. But as a new industrial America emerged it started its journey to become the new world power after the war. The country's interest in international affairs steadily grew. Friendly relations with Japan and trade with China was increased to the point when Open Door Policy 1899 was presented as a means of keeping China's trade open to all comers. Later U.S, along with Britain, Germany, France, and Japan entered into a world-wide race for power. Viewed in the long perspective, the Spanish American War was but one incident in a series of events which marked this arrival of United States as a world power. The years between 1865 a... There were many industrial revolutionary inventions like sewing machine, steel plow, telegraph, light bulb, telephone and many more, which made the U.S. boom in the international market. As America was on its path to become the world power, it introduced the method of mass production in the country. America was a rich continent for the aggressive and ingenious to master. Between 1865 and 1880 the national wealth doubled and by 1900 it became massive. The nation's iron ore, its oil, its lumber, and its western agricultural lands were sources of yet untapped wealth. Its people, who by and large admired the successful enterprise, eagerly provided investments and speculative capital. Only then it became clear that the dynamic capitalism of an expanding America, seizing upon unparalleled natural resources and utilizing the new machines of the industrial revolution, had transformed the national economy. There were 140,000 industries of all types in 1860 and by 1880, there were 250,000. In 20 years the employee double and labor force got strong. Estimated wealth in 1865 was 20 billion while in 80's it was 43 billion. Bank deposits tripled between 1865 and 1880. The inflation rate between 1880 and1890 was below 5 percent, which resulted in deduction of the tax rate. There were many ups and downs during this time period but it was not enough to become a hurdle in America way in becoming a world power. 3. Discuss the problems associated with the Industrial Revolution and how the people reacted. Include in your discussion the Populists and the Progressives. The United States, as a powerful force in the modern era of industry and world commerce, henceforth was to be an important participant in world affairs. There