4. Researchers conducted an experiment to evaluate the effectiveness of an for i
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4. Researchers conducted an experiment to evaluate the effectiveness of an for infants. A sample of infants born to mothers with low 1Qs were One group was placed in an educational day care while the second group remained at home with their mothers. At 5 years of age, randomly assigned to one of two groups. only II percent dependent variable in this study? of children placed in educational day care had 1Qs below 85, while 39 percent of children who remained at home wi th their mothers had IQs this low. What is the a. the mothers' IQ educational day care and home placement the children's 1Q at age 5 the birth of the children b. d. 15. In an experiment, a group of 200 patients afflicted with headaches are randomly assigned to two groups. The experimental group receives an investigatory drug; the control group receives a placebo. At the conclusion of the experiment, the esearchers interviewed the patients to determine the degree of headache pain they experience. What is the independent variable in this experiment? the 200 patients b the degree of migraine pairn c. the drug versus placebo groups d. the placebo 16. In an experiment, random assignment is used to ensure that all groups of the independent variable are the same in factors such as age, gender, ethnic background, socioeconomic status, and so on. This is done in order to avoid or minimize the influence of confounding variables dependent variables b. c. demand characteristics d. testing effects 17. Both the researchers and the participants in a memory study are ignorant about which participants have actually received a potentially memory-enhancing drug and which received a placebo. As such, this experiment involves the use of a. naturalistic observation b. random assignment c. the double-blind procedure d. replication 18, A natural experiment involves the intensive, in-depth investigation of a single individual involves the observation and recording of behaviors as they occur in their natural setting uses a questionnaire or interview to investigate the opinions, behaviors, or characteristics of a particular group investigates the effects of a naturally occurring event on human behavior a. b. c. d. 19. Late one night, while watching television, you see an advertisement for an herb that claims to dramatically improve memory performance. In the add, five separate people are interviewed, all of that their memories improved dramatically since they began taking the supplement. What do you do? immediately place a large order for the herb call the "doctor" who discovered the herb and ask if you can have some for free begin to organize a series of parties, since you obviously will no longer need to study once you begin taking the herb delay placing your order until the herb is subjected to a double-blind, placebo- controlled study a. b. c. d.Explanation / Answer
15. B) the degree of migraine pain
The degree of migraine pain does not depend in if the patient has experienced placebo or the experimental drug. Rather, it is a phenomenon that is independently .
16. A) confounding variables
This is the influence of an outside variable that would interfere with the dependent as well as the independent variables. Confounding variables ruin the experiment carried out by the researcher, making the results non reliable.
17. C) double blind procedure
A double blind procedure is a procedure in which both the participants as well as the experimenter is not aware about the treatment that is being received by the participants. These studies prevent any bias that might affect the experiment.
18. B) involves the observation and recording of behaviours as they occur in their natural setting
19. D) delay placing your order until the herb is subjected to a double blind, placebo-controlled study
Unless the credibility of the drug is known, it cannot be used. This credibility can only be obtained by a double blind placebo controlled study.
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