T2 answers
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T2 answers

Course: PSY 9856, Spring 2012

School: North Central Texas...

Word Count: 1665


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Name: ___________________ Social Security #: ___________________ General Psychology Honors EXAM #2 ANSWERS SHORT ANSWER: Brief answers and bulleted responses are acceptable [40 points] Answer in space provided; if you use the back, please indicate that. 1. A researcher conducts a typical twin study to determine the genetic and environmental influences on the etiology of schizophrenia: a. The researcher recruits...

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___________________ Social Name: Security #: ___________________ General Psychology Honors EXAM #2 ANSWERS SHORT ANSWER: Brief answers and bulleted responses are acceptable [40 points] Answer in space provided; if you use the back, please indicate that. 1. A researcher conducts a typical twin study to determine the genetic and environmental influences on the etiology of schizophrenia: a. The researcher recruits 500 pairs of MZ twins and 500 pairs of DZ twins, all of them raised together? What does MZ and DZ stand for, and what are the characteristics of these 2 pairs of twins? [2 points] MZ monozygotic, identical (share 100% of genes) DZ dyzygotic, fraternal (share ~ 50% of genes) b. If the concordance rate for schizophrenia among MZ twins is 75% and the concordance rate for schizophrenia among DZ twins is 30%, what can the researcher conclude? [2 points] That genetics influences the onset of schizophrenia, over and above environment. c. How does he justify this conclusion? What is it about twin studies that allow us to make these conclusions? [2 points] Since both sets of twins were raised with similar background, the only thing that can account for differences in the similarities between these twin pairs is the fact that MZ have same genesthus genetics is important. d. If genetics fully accounted for the development of schizophrenia, what would be the concordance rate among MZ twins? [1 point] 100% e. Name at least ONE criticism of this twin study approach. [1 point] MZ twins are treated more similarly than DZ twins, thus this would mean that environment can account for differences in the concordance rates of MZ and DZ twins. Nonshared environmental effects not as apparent. 2. For each of the following scenarios, identify the four major elements of classical conditioning. Specifiy for each: a) the unconditioned stimulus (US), b) the conditioned stimulus (CS), the unconditioned response (UR), and d) the conditioned response (CR). [2 points each, for a total of 8 points] a. To discourage coyotes from attacking their sheep, ranchers feed the coyotes small pieces of mutton tainted with poison that, when ingested, cause the coyotes to experience extreme dizziness and nausea. Later, when the coyotes 1 are placed in the pen with the sheep, the mere smell of the sheep causes the coyotes to run frantically away from their former prey. b. As part of a new and intriguing line of research in behavioral medicine, researchers give mice saccharine-flavored water (a sweet substance that mice love) and then follow it up with an injection of a drug that weakens the mices immune systems. Later when the mice drank saccharine-flavored water, they showed signs of a weakened immune response. Research is currently underway to see if the reverse is possible (i.e., if conditioning can be used to increase immune functioning), a discovery which would surely have important implications for new medical treatments c. A passenger on an airplane was feeling very anxious about an important job interview the next morning, and as a result he was uneasy and nervous throughout the flight. Back at home weeks later, he is contemplating a holiday trip. Though he hadnt previously been afraid to fly, he finds himself suddenly nervous about flying and decided to cancel his plans to visit out-of-state relatives. d. Its no secret that people become unhappy when bad weather strikes, but what is surprising is that weather forecasters are consistently blamed for weather over which they obviously have no control. Weather forecasters around the country have been constantly harassed and blamed by people who mistakenly infer a causal relationship between the forecaster with subsequent foul weather patterns, like tornadoes. Classical Conditioning Scenarios 1 US poison UR dizziness/ nausea (aversion) CS sheep CR running away (aversion) 2 immunesuppressing drug weakened immune response saccharineflavored water weakened immune response 3 job interview anxiety/ nervousness airplane/flying anxiety/fear 4 bad weather unhappiness weathercaster unhappiness 3. For each example below, identify whether positive reinforcement, negative reinforcement, or punishment is illustrated. The behavior that is either being reinforced or punished is in bold. [1 point each, for a total of 8 points] a. Police pulling drivers over and giving prizes for buckling up. Pos reinf b. Not allowing a basketball player from playing in the next 2 games because he committed a flagrant foul. Neg punishment 2 c. A soccer player rolls her eyes at a teammate who delivered a bad pass. Pos punishment d. The teacher finally calls on the student who has been snapping her fingers and making eager noises to get the teachers attention. Negative reinforcement e. Receiving a city utility discount for participating in a recycling program. Neg reinforcement f. A parent nagging a child to clean up her room. Neg reinf g. A rat presses a lever to terminate a shock or a loud noise. Neg reinf h. At a party, a husband becomes sullen when his wife flirts with a colleague. Pos punishment 4. A woman is interested in getting her husband to wash the dishes more frequently. Describe how she can train her husband to do the dishes and what she can do to ensure that he will continue to do the dishes for a long time in the future, even if she drops her vigilance on his behavior. Present the scenario, using examples, and also define relevant terms. [2 use points] Can shaping reinforce increasing approximations of target behavior and increase ante for reinforcement. Use partial reinforcement schedule to ensure he will continue to wash dishes even after she has stopped reinforcing him. 5. Using classical and operant conditioning models, explain how (a) phobias develop or originate, and (b) how they are maintained. When talking about classical conditioning, describe the US, UR, CS, and CR. When talking about operant conditioning, be sure to describe what the behavior is and how it is either reinforced or punished. [4 points] How phobias develop: classical conditioning: traumatic event with feared object. UStrauma, CS-feared object (snake), UR fear, CR fear How phobias are maintained: operant conditioning: avoidance is negatively reinforced because a decrease in anxiety after avoid, but it prevents extinction. 6. Imagine that a lion just walked into the classroom and appeared threatening. Or imagine yourself taking the final exam in this course. Describe what symptoms you experience under these situations in terms of these categories: emotional, cognitive, physiological and behavioral responses. [3 points] Emotional Fear Cognitive thoughts of upcoming death 3 Physiological increased HR, etc Behavioral Run out of room, fight lion 7. Describe an example of misattribution, as a reflection of Schachter & Singers Two-Factor Model. Be sure to explain why this example illustrates misattribution and describe the components (or factors) of the experience that are involved in this process. [3 points] Exercise with someone, and start becoming attracted to them. Physiological signals (physiology) and arousal attributed to the person (environmental cues), so label (cognitive interpretation) the arousal as attraction or love. 8. Describe how an emotion can serve as an action disposition, to prime behaviors, including fear-related behavior and even aggression, using an emotion network model of emotion. [2 points] Aversive events trigger emotion centers that involve connections between feelings, thoughts, physiology, and behaviors and negative emotions can trigger responses that are consistent with that emotion, because these are all governed by an aversive motivational system that evolved to help us survive. 9. Describe how measurement of the startle response differs from measurement of the autonomic nervous system indices (such as heart rate and skin conductance) in trying to determine the valence and arousal level of an individuals emotional experience. [2 points] Startle is an index of the valence of an emotional response whereas autonomic measures do not tell us much about valence, more about the level of arousal that the person is experiencing, whether positive or negative arousal. MULTIPLE CHOICE [10 points] 1. Francis Galton studied intelligence in families, and found that genius congregated within families (that is, smart people tended to have smart relatives). From these data, Galton concluded that: a. b. c. d. nature and nurture both affect intelligence heredity mostly determines intelligence rich families send their children to better schools identical twins are more alike than fraternal twins B 2. During the class lecture on operant conditioning, the poker chip served as a __________ for class participation: a. b. c. d. negative reinforcer punisher positive reinforcer conditioned stimulus (CS) C 3. The diathesis-stress model of psychological disorders, that the instructor discussed in class, stresses the importance of: a. b. c. d. Obtaining a clear diagnosis of problems. environmental circumstances that can trigger biological predispositions genes in causing disorders familial stress in the development of psychological problems. 4 B 4. According to class lecture, in the maintenance of phobias, the behavior that prevents extinction of the fear is: a. b. c. d. screaming at the sight of the feared object experiencing intense, irrational fear at the sight of the object taking prescription medications to allay the fear avoidance of the feared object D 5. In physiological experiments, it has been shown that psychopaths, compared to normal subjects, show diminished startle responses to a. b. c. d. pleasant stimuli only neutral stimuli only pleasant and aversive stimuli all stimuli C 6. Following habituation to one stimulus, the tendency for a different stimulus to arouse new interest in an infant is called: a. restoration b. recovery c. renewal d. rectification B 7. It is probably not coincidental that the development of object permanence is typically accompanied by the development of a. egocentric thought b. separation anxiety c. conservation d. telegraphic speech B 8. A child who is reading a book upstairs calls to his mother who is downstairs, Mommy, whats this a picture of? This illustrates that the child is: a. Concrete operational b. Egocentric c. Babbling d. Experiencing separation anxiety B 9. A person does not drive over the speed limit because it is against the law. According to Kohlberg, acting in such a manner in order to maintain the social order is an example of the _____ level of moral thought. a. unconventional b. preconventional c. conventional 5 d. postconventional C 10. Reviewing research on how babies react to the behaviors of other babies, Martin Hoffman has suggested that morality in children is based on: a. reflex behavior b. empathy c. selfishness d. rewards and punishments B 6