/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 50 Give an example of an experiment... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 2: Problem 50

Give an example of an experiment for each of the following: a. Single-blind experiment with the subjects blinded b. Single-blind experiment with the individuals measuring the response blinded c. Double-blind experiment d. An experiment for which it is not possible to blind the subjects

Short Answer

Expert verified
a. For the single-blind experiment with subjects blinded, an example could be a clinical trial for a new drug, where the subjects don't know whether they are receiving the actual drug or a placebo. b. For the single-blind experiment with the individuals measuring the response blinded, an example could be a test of a new teaching method where the teachers know which method they are applying, but the graders do not know which method was used when grading exams. c. For the double-blind experiment, an example could be a study comparing the effectiveness of two types of therapy, where neither the patients nor the therapists know which type of therapy the patient is receiving. d. For the experiment for which it is impossible to blind the subjects, an example could be a research study testing the effects of physical exercise in elderly people. The subjects would know whether they are in the group that is exercising or in the control group.

Step by step solution

01

Single-blind experiment with the subjects blinded

In a single-blind experiment where the subjects are blinded, the subjects do not know which group they are in (experimental or control), but the researcher does. An example of this could be a clinical trial for a new drug, where the subjects do not know if they are receiving the actual drug or a placebo.
02

Single-blind experiment with the individuals measuring the response blinded

In a single-blind experiment where the individuals measuring the response are blinded, the researchers applying the treatment know which is the experimental group and which is the control group, but those who measure the response or analyze the data do not. An example could be a test of a new teaching method where the teachers know which method they are applying, but the graders do not know which method was used when grading exams.
03

Double-blind experiment

In a double-blind experiment, neither the subjects nor the researchers know which is the experimental group and which is the control group. This procedure is used to prevent bias in research results. An example of this could be a study comparing the effectiveness of two different types of therapy, where neither the patients nor the therapists know which type of therapy the patient is receiving.
04

An experiment for which it is not possible to blind the subjects

There are some experiments where it isn't possible to blind the subjects. Usually, this occurs when the nature of the treatment or procedure is obvious to the subject. An example of this could be a research study testing the effects of physical exercise in elderly people. The subjects would know whether they are in the group that is exercising or in the control group.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Does living in the South cause high blood pressure? Data from a group of 6278 whites and blacks questioned in the Third National Health and Nutritional Examination Survey between 1988 and 1994 (see CNN.com web site article of January 6,2000 , titled "High Blood Pressure Greater Risk in U.S. South, Study Says") indicates that a greater percentage of Southerners have high blood pressure than do people in any other region of the United States. This difference in rate of high blood pressure was found in every ethnic group, gender, and age category studied. List at least two possible reasons we cannot conclude that living in the South causes high blood pressure.

Swedish researchers concluded that viewing and discussing art soothes the soul and helps relieve medical conditions such as high blood pressure and constipation (AFP International News Agency, October 14 , 2005). This conclusion was based on a study in which 20 elderly women gathered once a week to discuss different works of art. The study also included a control group of 20 elderly women who met once a week to discuss their hobbies and interests. At the end of 4 months, the art discussion group was found to have a more positive attitude, to have lower blood pressure, and to use fewer laxatives than the control group. a. Why would it be important to determine if the researchers assigned the women participating in the study at random to one of the two groups? b. Explain why you think that the researchers included a control group in this study.

The authors of the paper "Illicit Use of Psychostimulants among College Students" (Psychology, Health \& Medicine [2002]: 283-287) surveyed college students about their use of legal and illegal stimulants. The sample of students surveyed consisted of students enrolled in a psychology class at a small, competitive college in the United States. a. Was this sample a simple random sample, a stratified sample, a systematic sample, or a convenience sample? Explain. b. Give two reasons why the estimate of the proportion of students who reported using illegal stimulants based on data from this survey should not be generalized to all U.S. college students.

Based on a survey of 4113 U.S. adults, researchers at Stanford University concluded that Internet use leads to increased social isolation. The survey was conducted by an Internet-based polling company that selected its samples from a pool of 35,000 potential respondents, all of whom had been given free Internet access and WebTV hardware in exchange for agreeing to regularly participate in surveys conducted by the polling company. Two criticisms of this study were expressed in an article that appeared in the San Luis Obispo Tribune (February 28 . 2000). The first criticism was that increased social isolation was measured by asking respondents if they were talking less to family and friends on the phone. The second criticism was that the sample was selected only from a group that was induced to participate by the offer of free Internet service, yet the results were generalized to all U.S. adults. For each criticism, indicate what type of bias is being described and why it might make you question the conclusion drawn by the researchers.

Fast-paced lifestyles, in which students balance the requirements of school, after-school activities, and jobs, are thought by some to lead to reduced sleep. Suppose that you are assigned the task of designing a survey that will provide answers to the accompanying questions. Write a set of survey questions that might be used. In some cases, you may need to write more than one question to adequately address a particular issue. For example, responses might be different for weekends and school nights. You may also have to define some terms to make the questions understandable to the target audience, which is adolescents. Topics to be addressed: How much sleep do the respondents get? Is this enough sleep? Does sleepiness interfere with schoolwork? If they could change the starting and ending times of the school day, what would they suggest? (Sorry, they cannot reduce the total time spent in school during the day!)
See all solutions

Recommended explanations on Math Textbooks

Geometry

Read Explanation

Calculus

Read Explanation

Pure Maths

Read Explanation

Mechanics Maths

Read Explanation

Probability and Statistics

Read Explanation

Theoretical and Mathematical Physics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.