Conduct three of the following experiments and record your reactions. Be specific for each experiment.
1- Rub your index fingers gently over a piece of very coarse sandpaper a few times and rate its coarseness on a scale from 1 (very soft) to 7 (very coarse). After a minute or two, rub the same finger over the paper and again rate its coarseness. Did your perception of the coarseness change? How?
2- Distribute one cup with sugar water and one with fresh water. Take a sip of the sugar water and swish it around in your mouth for several seconds without swallowing it; gradually, it should taste less sweet. After swallowing it (or spitting it back into the cup), taste from the cup containing fresh water. Did the taste of the fresh water surprise you? How?
3- Take about 15 index cards and a flashlight that is opaque on all sides (so that light shines only through the front) into a very dark room. After placing all 15 cards over the beam of light, slowly remove the cards one at a time until you can barely detect the light, and then count the number of cards that remain over the light. After a few minutes, the light should begin to look brighter. When this is the case, add a card and see if you can still see the light. Repeat this process of gradually adding cards over a 15-minute period. Were you able to detect an increasingly dim light the longer you spent in the dark?
4- Fill 3 medium-sized bowls with (a) very hot (but not painfully so) tap water, (b) very cold tap water, and (c) a mixture of the very hot and very cold water. Arrange them, so your right hand is in front of the cold water, your left hand is in front of the hot water, and the lukewarm water is in the middle. Submerse your hands into the water (right into cold, left into hot) for about 3 minutes. After 3 minutes, quickly transfer both hands to the lukewarm (middle) bowl. What did you sense?
In all four experiments, you will experience adaptation.
Fully describe the process and results of each experiment.
What is adaptation? Explain adaptation as discussed in the text, not as a general dictionary definition.
Explain how adaptation is evident in each of your experimental results.
Comprehensively describe the sensory systems involved in these experiments, from the receptors all the way into and including the brain.
Please see response attached (see Posting 105968.doc) (also presented below), including an excellent APA resource. I hope this helps and take care.
This is quite straightforward. The process is explained for each experiment and all you really need to do is follow the directions in each scenario, and record the results. You are expected to conduct the experiments (you acting as both researcher and the participant), and report the results in terms of adaptation. This is important for you to learn about the adaptation process. Your tentative outline might look something to the effect...
I. Introduction (about ¼ - ½ page, explain adaptation as discussed in the text, not as a general dictionary definition, introducing topic and purpose statement; see suggested definition below the outline)
E.g. provide a definition of adaptation, which generally means that your brain adapts to a stimuli over repeated exposure, which changes the sensation perception of the stimuli. (Check the definition in your text or class material and use that definition is possible).
II. Three experiments (using illustrative examples below).
· Experiment 1 (e.g. about ½ page: explain the experiment, the results, explain how adaptation is evident in each of your experimental results, provide a comprehensively describe the sensory systems (e.g., touch perception, taste perception, and so on) involved in these experiments, from the receptors all the way into and including the brain)).
· Experiment 2 (e.g. about ½ page; repeat the same process as for Experiment 1, as described below)
· Experiment 4 (e.g. about ½ page; repeat the same process as for Experiment 1, as described below)
III. Discussion and Conclusion (tie up main points e.g., brief explanation about adaptation and its impact on sensory perception (touch, etc.).
DEFINITION OF ADAPTATION:
The following definition is perhaps close to your text definition, but please use your text definition as suggested in the requirements for this assignment.
Neural adaptation or sensory adaptation...
It is a change over time in the responsiveness of the sensory system to a constant stimulus. It is usually experienced as a change in the stimulus. For example, if one rests one's hand on a table, one immediately feels the table's surface on one's skin. Within a few seconds, however, one ceases to feel the table's surface. The sensory neurons stimulated by the table's surface respond immediately, but then respond less and less until they may not respond at all; this is neural adaptation.
More generally, neural adaptation refers to a temporary change of the neural response to a stimulus as the result of preceding stimulation. It is usually distinguished from memory, which is thought to involve a more permanent change in neural responsiveness. Some people use adaptation as an umbrella term that encompasses the neural correlates of priming and habituation. In most cases, adaptation results in a response decrease, but response facilitation does also occur. Some adaptation may result from simple fatigue, but some may result from an active recalibration of the responses of neurons to ensure optimal sensitivity. Adaptation is considered to be the cause of perceptual phenomena like afterimages and the motion aftereffect. In the absence of fixational eye movements, visual perception may fade out or disappear due to neural adaptation (http://en.wikipedia.org/wiki/Sensory_adaptation).
Now let's look closer at the following experiments to help you fill in the above outline:
1. Rub your index fingers gently over a piece of very coarse sandpaper a few times and rate its ...
In reference to adaptation, this solution provides illustrative examples of three of the four suggested experiments. Specifically, the three experiments measure differences in senses and perceptions, and the results are explained in terms of adaptation. An excellent APA resources is also included.