Ladd-Franklin's mathematical interests ultimately led her to make important contributions to the field of psychology. In 1886, she became interested in the geometrical relationship between binocular vision and points in space and published a paper on this topic in the first volume of the American Journal of Psychology the following year. During the 1891-92 academic year, Ladd-Franklin took advantage of her husband's sabbatical leave from Johns Hopkins and traveled to Europe to conduct research in color vision in the laboratories of George Müller (1850-1934) in Göttingen, and Herman von Helmholtz (1821-1894) in Berlin, where she also attended lectures by Arthur König. In contrast to the prevailing three-color and opponent-color explanations of color vision, Ladd-Franklin developed an evolutionary theory that posited three stages in the development of color vision. Presenting her work at the International Congress of Psychology in London in 1892, she argued that black-white vision was the most primitive stage, since it occurs under the greatest variety of conditions, including under very low illumination and at the extreme edges of the visual field. The color white, she theorized, later became differentiated into blue and yellow, with yellow ultimately differentiated into red-green vision. Ladd-Franklin's theory was well-received and remained influential for some years, and its emphasis on evolution is still valid today.
Religion is the answer; education, money, and occupation determine what class you are in.
<span>Better transportation, War Modern technology, Embargo Act of 1807, Assembly</span>
Answer:
The three factors that led to European exploration were economy, glory, and religion. The age of exploration began in the 15th century because Europeans were beginning to look for a new route to find Asia for spices and silk, which they became accustomed through Silk Route. Getting luxury items were becoming expensive for the Europeans merchants and people through Silk Route.
Europeans began to show interest in exploration because of the wealth and land they found in unknown land during the 15th century. European wanted to strengthen their economic position in Europe to show their power. European found New World and found routes to India and the Far East.
European empires began to establish colonies in new places like Central America and South America, where Spanish defeated the ancient empires of Maya, Aztec and Inca. Portuguese empire built their colonies in Africa, India, and in New World. European began to establish colonies to show their glory by gaining wealth and land.
Religious played a significant role in the Spanish conquest of the New World. The Papal Bull issued by Pope Alexander VI allowed Spain to have an exclusive right to the land discovered by Columbus. The Papal also gave the right to convert the Native Indians into catholic to save their soul.
