Susan is conducting an experiment to see if plants will grow…

Susan is conducting an experiment to see if plants will grow better with application of fertilizer. She separates 50 plants into two groups of 25. One group receives a liquid fertilizer when watered every other day, and the other group receives only water on the same days. The plants are kept in a greenhouse with constant and equal amounts of sunlight, and a constant temperature. She measures the plants once a week for 12 weeks. At the end of 12 weeks, the plants with the fertilizer grew an average of 9 inches, and the ones that were not given the fertilizer grew an average of 5 inches.In the scenario described above, the plants that received fertilizer are the ________ group, and the plants that did not receive fertilizer are the ________ group.

When measuring the speech reception threshold (SRT), we chan…

When measuring the speech reception threshold (SRT), we change the level to find the lowest (softest) level at which the patient repeats back words. However, when measuring word recognition or speech-in-noise performance, the level of the words is held constant.