L ocalization of functions in Psychology is a theo Essays

L ocalization of functions in Psychology is a theo Essays L ocalization of functions in Psychology is a theory that refers to the idea that different parts of the brain are responsible for specific behaviors, or that certain functions arelocalizedto certain areas in the brain. A study done by Robert Health (1950) clearly explained the theory of localization in which he tested the localization for pleasure. Another study demonstrated by James Olds (1950) in which he investigated the effect of stimulating the nucleus accumbens for rats. Robert health's aim from his study was to investigate the role of the nucleus accumbens (pleasure center of the brain).To do this, he used depressed patients . Depression is a great way to investigate this study as it is a common mental disorder that causes people to experience depressed mood, loss of interest or pleasure . The participants had electrodes attached to their head so that when they press the button it would electrically stimulates their nucleus accumbens and they would receive pleasure. The results indicated that over three hour session ,one participant known as b19 stimulated himself 1500 times. He experienced extreme euphoria and elation to a point where he had to be disconnected. A very similar study was conducted by James Olds but in his case, his aim was to understand the effect of activating the nucleus accumbens on rats. Olds began his procedure by having rats press on a lever in which it electrically stimulated their nucleus accumbens . The results indicated that rats were willing to walk across electrified grids to reach the pleasure lever and they were even willing to cross the electric rid and they preferred the stimulation over water and drinks. In conclusion, Robert health and James Old demonstrated localization of brain function since they found that pleasure is localizing nucleus accumbence . Although Health experimented his study on humans where as Olds experimented it on rats but they both were able to come up with the same conclusion. Evolutionis the change in the heritable characteristics of biological populations (species) over successive generation.Evolutionary processes give rise to biodiversity at every level of biological organisation , including the levels of species and i ndividual organisms and it mainly relies on the process of natural selection which basically means that organisms with the best characteristics and are adapted to their environment can pass down their genes to their offspring where as the ones that are not well adapted do not pass their genes to their offspring. Over time this results in significant changes in species. A behavior that can be explained by evolution is attraction. There are evolutionary explanation on why we find some people attractive and based on evolutionary benefits which yield for better offspring. This essay is going to discuss the theory of attraction with reference to Wedekind experiment that was conducted in 1995 Weekind's aim for his experiment was to investigate the role of genes (MHC) r elated to immune system in mate selection . MHC genes have a really huge benefits on the immune system as it helps it to identify foreign substances in the body and by having a huge amount of MHC this can lead for a better identification for harmful substances so by having a diverse MHC this can lead for a better immune system for the child therefore humans must have envolve system that can recognize potential mate s with different MHC genes,so t hey can reproduce together offspring with stronger immune systems. For this experiment they used 49 women and 44 men with a wide range of MHC genes. Each man received a clean T shirt and was asked to wear it for 2 nights, as each man was given odour free soup/aftershave and were asked to ensure they remain odour neutral (in order to induce the stronger body odour ) and they were forbidden to eat spicy food. After th e men returned the t shirts, each t shirt was placed in a plastic lined cardboard box with the sniffing hole on top. The women were returned to the study when they were in the middle of the cycle because of their smell was the strongest at that point and they received set of 7 boxes in which 3 of the

The Experts Guide to the AP Calculus AB Exam

The Expert's Guide to the AP Calculus AB Exam SAT / ACT Prep Online Guides and Tips Are you taking the AP Calculus AB exam this spring and want to be well prepared on test day?The AP Calculus AB exam in 2020 will be held on Tuesday, May 5, at 8 am. Before you sit down to take the exam, though, it’s critical that you know how the Calculus AB test is formatted, what topics it covers, and how you’ll be scored on it. This guide will go over all of that information while also showing you official sample problems and giving you tips on the best way to prepare for AP Calculus AB. The exam was updated in May 2017, sothis guide will explain what changes have been made and how they might affect your review.The AP Calculus AB exam can sometimes seem overwhelming, but we're here to break it down into clear and manageable information for you. Let’s get started! What’s the Format of the AP Calculus AB Exam? The AP Calculus AB exam is three hours and 15 minutes long and has two sections. Both of these sections are divided into two parts (based on whether or not a calculator is allowed). Multiple-Choice Section Here is an overview of the format of the AP Calculus AB multiple-choice section: 45 questions total One hour 45 minutes total Worth 50% of your total score Part A 30 questions 60 minutes No calculator allowed Part B 15 questions 45 minutes Calculator required Note that the AP Calculus AB exam has had small changes made to its format. Previously, Part A of the multiple-choice section had 28 questions, and Part B had 17 questions. Free-Response Section Here is a rundown of the format of the AP Calculus AB free-response section: Six questions total One hour 30 minutes total Worth 50% of your total score Part A Two questions 30 minutes Calculator required Part B Four questions 60 minutes No calculator allowed This can all look a little complicated, but basically, the AP Calculus AB exam consists of four parts. The first two are multiple choice, and the last two are free response. You are required to use a calculator for the middle two parts (one each for multiple choice and free response), but you may not use a calculator for the first and last parts of the exam. What Topics Does the AP Calculus AB Exam Cover? Content on the Calculus AB exam can be divided into three main topic areas, referred to by the College Board as Big Ideas.Within these three Big Ideas are more specific topics called Enduring Understandings (often abbreviated as â€Å"EU†). Each Enduring Understanding contains both Learning Objectives and Essential Knowledge that the student should have learned by the time of the exam. As I mentioned, there have been some updates to the AP Calculus AB exam. Fortunately, they’re relatively minor changes that mostly have to do with how the course framework is structured, and this will affect instructors of the course more than it will you.The only significant change to the content of the AP Calculus AB exam is that L’Hospital’s Rule will now be included on it- and students will be expected to understand and apply it. I’ve listed each of the Big Ideas and their Learning Objectives below,since these are the most relevant for students looking for what the exam covers. For the sake of length and clarity, I left out the Enduring Understandings and Essential Knowledge. If you’d like to see these, as well as more detailed information on the content covered by the exam, check out the officialAP Calculus AB Course Description. Still, know that the information below will give you a solid look at what you’re expected to know for the exam. Learning Objectives are listed below Big Ideas. These Learning Objectives are skills that students are expected to know how to do for the exam. Big Idea 1: Limits Express limits symbolically using correct notation Interpret limits expressed symbolically Estimate limits of functions Determine limits of functions Analyze functions for intervals of continuity or points of discontinuity Determine the applicability of important calculus theorems using continuity Big Idea 2: Derivatives Identify the derivative of a function as the limit of a difference quotient Estimate derivative Calculate derivatives Determine higher order derivatives Use derivatives to analyze properties of a function Recognize the connection between differentiability and continuity Interpret the meaning of a derivative within a problem Solve problems involving the slope of a tangent line Solve problems involving related rates, optimization, and rectilinear motion Solve problems involving rates of change in applied contexts Verify solutions to differential equations Estimate solutions to differential equations Apply the Mean Value Theorem to describe the behavior of a function over an interval Big Idea 3: Integrals and the Fundamental Theorem of Calculus Recognize antiderivatives of basic functions Interpret the definite integral as the limit of a Riemann sum Express the limit of a Riemann sum in integral notation Approximate a definite integral Calculate a definite integral using areas and properties of definite integrals Analyze functions defined by an integral Calculate antiderivatives Evaluate definite integrals Interpret the meaning of a definite integral within a problem Apply definite integrals to problems involving the average value of a function Apply definite integrals to problems involving motion Apply definite integrals to problems involving area and volume Use the definite integral to solve problems in various contexts Analyze differential equations to obtain general and specific solutions Interpret, create, and solve differential equations from problems in context AP Calculus AB Sample Questions Looking at sample questions is one of the best ways to get a feel for what the AP Calculus AB exam will be like. Here arefour sample questions, one from each part of the AP exam.Each of these questions was taken from the official AP Calculus AB Course Description, which you can look at for more complete answer explanations and additional sample problems. Multiple Choice (No Calculator) This question tests your ability to calculate derivatives. You'll need to use the chain rule to differentiate composite functions. The correct answer to this problem is B. Multiple Choice (Calculator Allowed) This question tests your ability to solve problems with rapid rates of change. You'll have to find the derivative in order to findthe rate of change of the temperature of the water. The correct answer is B. Free Response (Calculator Allowed) This question tests your knowledge of integrals. Parts A, B, and C are each worth 3 points. Free Response (No Calculator) This question tests your knowledge of multiple topics, including derivatives and integrals. You can receive up to 1 point for part A, 2 points for part B, and 3 points each for parts C and D. How Is the AP Calculus AB Exam Scored? As mentioned, the multiple-choice section and the free-response section are each worth 50% of your total exam score. For the multiple-choice section, you earn 1 point for each question you answer correctly. No points are deducted for incorrect answers, so you should answer every question! You can earn up to 45 points for this section. For the free-response section, each of the six questions is worth 9 points, so you can earn up to 54 points. Different parts of each question can beworth a different amount of points (for example, on one question you may be able to earn up to 1 point for part A, 3 points for part B, 3 points for part C, and 2 points for part D). After your points are added up for each of your sections, your AP Calculus AB score is converted to the standard AP scoring scale of 1-5.The exact formula for doing this can change slightly from year to year. However, in 2008, the process for converting raw AP scores to scaled scores involved multiplying the number of multiple-choice questions you answered correctly by 1.2272,and then adding that number to the points you received on the free-response section. This valueis rounded to the nearest whole number and becomes your composite score. Each AP score (from 1-5) corresponds to a range of composite scores. Below,you can see the conversion chart and score distributions for test takers from the 2018 Calculus AB exam: Composite Score Range AP Score % of Students Who Got Score 0-26 1 20.0% 27-38 2 22.4% 39-51 3 21.0% 52-67 4 17.3% 68-108 5 19.4% Source: The College Board 3 Tips for Preparing for the AP Calculus AB Exam Studying for the AP Calculus AB exam can be tough. Use these three tips to make your studying more effective and increase your chances of getting a great score. Tip 1: Memorize Important Formulas There are certain formulas for AP Calculus AB that you should have down pat.There's no formula sheet given on the AP exam, so you’ll have to memorize the formulas you'll need. Many teachers give out formula sheets for students to memorize. There are also various formula cheat sheets you can use to review before the exam. To find these, simply Google â€Å"AP Calculus AB formula sheet† and look at your options. In general, any formula you use regularly in class is a good one to memorize.Major formulas you should have memorized include those for limits, differentiation, and integration, as well as the fundamental theorems. Tip 2: Know How to Use Your Calculator You’re allowed to use your calculator for two of the four exam parts, and most of the questions in these two sections will be difficult, if not impossible, to solve without a graphing calculator. While it might seem obvious that you should know how to work your calculator, knowing exactly how and when to use its different functions can save you a lot of time on the exam and increase your chances of getting the correct answer. According to the College Board, the four calculator capabilities you’ll use the most during the AP Calculus AB exam and should easily be able to do with your calculator are as follows: Plot the graph of a function within an arbitrary viewing window Find the zeros of functions (solve equations numerically) Numerically calculate the derivative of a function Numerically calculate the value of a definite integral When you’re preparing for the exam, be sure that you know how to do each of these (completing practice problems can help!). Tip 3: Get Used to Showing All Your Work For most free-response questions on the AP Calculus AB test, the final answer to a problem is only worth 1-2 points out of a possible 9.This means that the majority of points are earned through intermediate steps of the problem- and if you don’t show how you reached those intermediate steps, you won’t get a high score on this section. Even if you get a correct answer by using your calculator, you have to write the setup (such as the equation being solved or the derivative being evaluated) as well as the answer in order to get credit for your work. You might be used to not writing down certain work that seems particularly obvious on homework and class tests. However, even if your teacher doesn’t mind, AP graders will. Remember that APgraders are more interested in how you reached your final answer than they are in what that final answer is, so get yourself in the habit of showing each step of your work well before exam time. Conclusion: What to Know About the AP Calculus AB Exam The AP Calculus AB exam can be intimidating if you don’t know what to expect.Knowing how the exam will be formatted and what types of questions it will ask can go a long way toward helping you feel more prepared and confident on test day. The exam has two sections, multiple-choice and free-response, which are each divided into two parts, based on whether or not you may use a calculator.Each of these sections is worth 50% of your total AP score. The exam itself covers three main topics: Limits Derivatives Integrals and the Fundamental Theorem of Calculus In order to prepare for the AP Calculus AB exam in the best way, keep these three tips in mind during your review: Memorize important formulas Know how to use your calculator Get used to showing all your work What's Next? Now that you know what the AP Calculus AB exam covers, the next step is to practice!Read our guide to getlinks toevery Calculus AB practice test available online. Wondering how challenging other AP classes are? Learn what the easiest AP classesareand what the hardest AP classes are so that you know exactly what to expect! Not surewhich other math classes you should take? Math is often the trickiest school subject to choose classes for, but our guide will help you figure out exactly which math classes to take for each year of high school. Want to improve your SAT score by 160 points or your ACT score by 4 points? We've written a guide for each test about the top 5 strategies you must be using to have a shot at improving your score. Download it for free now: