Module 2
-
Upload
mechelle-rich -
Category
Documents
-
view
17 -
download
0
description
Transcript of Module 2
Module 2
Research StrategiesResearch Strategies
Scientific Method
A method of learning about the world through the application of critical thinking and tools such
as observation, experimentation, and
statistical analysis
A method of learning about the world through the application of critical thinking and tools such
as observation, experimentation, and
statistical analysis
Scientific Method
Formulating the QuestionDeveloping a Hypothesis
Hypothesis: A statement of the results that the experimenter expects.
Testing the HypothesisDrawing ConclusionsReport Your Results
Formulating the QuestionDeveloping a Hypothesis
Hypothesis: A statement of the results that the experimenter expects.
Testing the HypothesisDrawing ConclusionsReport Your Results
Laboratory
Method of conducting research in a controlled environmentSubjects: People or animals on whom a
study is conducted.Placebo: A “medicine” that has no active
ingredients and works by the power of suggestion.
Double-blind Study: A study during which neither participants nor researchers know to which group any subject belongs.
Method of conducting research in a controlled environmentSubjects: People or animals on whom a
study is conducted.Placebo: A “medicine” that has no active
ingredients and works by the power of suggestion.
Double-blind Study: A study during which neither participants nor researchers know to which group any subject belongs.
Bias
Research Bias: A tendency for researchers to engage in behaviors and selectively notice evidence that supports their hypothesis or expectations.
Participant Bias: A tendency for research participants to respond in a certain way because they know they are being observed or they believe they know what the researcher wants.
Research Bias: A tendency for researchers to engage in behaviors and selectively notice evidence that supports their hypothesis or expectations.
Participant Bias: A tendency for research participants to respond in a certain way because they know they are being observed or they believe they know what the researcher wants.
Variables
Independent: The factor that the experimenter manipulates or changes in a study. IF refers to the independent variable (what is
controlled)Dependent: The factor in a study that
changes or varies as a result of changes in the independent variable.THEN refers to the dependent variable (what
is measured)
Independent: The factor that the experimenter manipulates or changes in a study. IF refers to the independent variable (what is
controlled)Dependent: The factor in a study that
changes or varies as a result of changes in the independent variable.THEN refers to the dependent variable (what
is measured)
Field Studies
Field study: research that takes place outside the laboratory.Experimental Group: the group on which the
critical part of the experiment is performed.Control Group: the group that does not
participate in the critical part of the experiment.Example: Jet Lag
Field study: research that takes place outside the laboratory.Experimental Group: the group on which the
critical part of the experiment is performed.Control Group: the group that does not
participate in the critical part of the experiment.Example: Jet Lag
Fighting Insomnia
HypothesisX amount of sleeping pills helps the otherwise
healthy person with insomnia sleep better,Subjects
The subjects of the experiment are two groups of people in similar physical health, within the same age range, and with similar sleep problems.
HypothesisX amount of sleeping pills helps the otherwise
healthy person with insomnia sleep better,Subjects
The subjects of the experiment are two groups of people in similar physical health, within the same age range, and with similar sleep problems.
Insomnia
Independent Variable (this is the variable that the experimenter changes)
The experimenter regulate the “medicine,” with one group receiving genuine sleeping pills while the other receives a placebo.
Dependent Variable (this is what results from the experimenter’s varying or changing the independent variable)
The results can vary among better sleep, worse sleep, and about the same amount of sleep.
Independent Variable (this is the variable that the experimenter changes)
The experimenter regulate the “medicine,” with one group receiving genuine sleeping pills while the other receives a placebo.
Dependent Variable (this is what results from the experimenter’s varying or changing the independent variable)
The results can vary among better sleep, worse sleep, and about the same amount of sleep.
Insomnia
Control (this is the removal of factors other than the independent variable that might cause the results)
The experiment will not use people that are sick, people with sever allergies, or people who are very old. Anyone of these factors could alter the real effects of the medicine in the average person with insomnia.
Control (this is the removal of factors other than the independent variable that might cause the results)
The experiment will not use people that are sick, people with sever allergies, or people who are very old. Anyone of these factors could alter the real effects of the medicine in the average person with insomnia.
Insomnia
Control Group (this croup consists of subjects who are like those in the experimental group except that they do not participate in the crucial part of the study)
The control group in this study consists of those subjects who receive placebo, thinking it is a sleeping pill.
Control Group (this croup consists of subjects who are like those in the experimental group except that they do not participate in the crucial part of the study)
The control group in this study consists of those subjects who receive placebo, thinking it is a sleeping pill.
Insomnia
Experimental Group (These are the people who participate in the crucial part of the study.)
The experimental group consists of those subjects who get X amount of sleeping pills.
Experimental Group (These are the people who participate in the crucial part of the study.)
The experimental group consists of those subjects who get X amount of sleeping pills.
Insomnia
ResultsThe hypothesis turns out to be incorrect in a
real-life study. Thus, we reject the hypothesis that those who receive the sleeping pill will sleep better. What is found is that subjects taking the sleeping pill over a period to days will still have insomnia, only worse. And the sleep they do get is less restful than the sleep the control group gets.
ResultsThe hypothesis turns out to be incorrect in a
real-life study. Thus, we reject the hypothesis that those who receive the sleeping pill will sleep better. What is found is that subjects taking the sleeping pill over a period to days will still have insomnia, only worse. And the sleep they do get is less restful than the sleep the control group gets.
Other Methods of Studying Behavior
Survey Method: A method of research that involves asking subjects questions about their feeling, opinions, or behavior patterns. Sample: A group that represents a larger group. Random sample: a sample that fairly represents a
population because each member has an equal chance of inclusion.
Need to make sure a good sample group is gotten. Questions need to be stated or asked to not persuade toward one particular thing
Survey Method: A method of research that involves asking subjects questions about their feeling, opinions, or behavior patterns. Sample: A group that represents a larger group. Random sample: a sample that fairly represents a
population because each member has an equal chance of inclusion.
Need to make sure a good sample group is gotten. Questions need to be stated or asked to not persuade toward one particular thing
Other Methods
Naturalistic Observation - Studying subjects without their being ware that they are being watched.
Correlation Study: A research project designed to discover the degree to which tow variables are related to each other.
Interviews - Studying people face to face and asking questions.
Case Study Method - Research that collects lengthy, detailed information about a person’s background, usually for psychological treatment.
Naturalistic Observation - Studying subjects without their being ware that they are being watched.
Correlation Study: A research project designed to discover the degree to which tow variables are related to each other.
Interviews - Studying people face to face and asking questions.
Case Study Method - Research that collects lengthy, detailed information about a person’s background, usually for psychological treatment.
Other Methods
Psychological testing - Objective method for observation and measurement of subjects in various areas, such as intelligence. (IQ test)
Cross-sectional Method - Looks at different age groups at the same time in order to understand changes that occur during the life span.
Longitudinal Method - Studies the same group of people over an extended period of time.
Psychological testing - Objective method for observation and measurement of subjects in various areas, such as intelligence. (IQ test)
Cross-sectional Method - Looks at different age groups at the same time in order to understand changes that occur during the life span.
Longitudinal Method - Studies the same group of people over an extended period of time.
Advantages and Disadvantages
Advantages Field:
Setting is more realistic
Laboratory:Completely objective
accurate information Survey:
Gather info. On feelings, opinions, and behavior patterns. Accurate Results
Advantages Field:
Setting is more realistic
Laboratory:Completely objective
accurate information Survey:
Gather info. On feelings, opinions, and behavior patterns. Accurate Results
Disadvantages
Difficult to control all variables
Artificial setting may not reflect “real world”
Questions may not be objective. Interpretation of results maybe distorted. Sample may not be representative of the population as a whole.
Disadvantages
Difficult to control all variables
Artificial setting may not reflect “real world”
Questions may not be objective. Interpretation of results maybe distorted. Sample may not be representative of the population as a whole.
Advantages and Disadvantages
Advantage Naturalistic
Observation:Completely
natural Interview:
Obtain personal detailed information
Advantage Naturalistic
Observation:Completely
natural Interview:
Obtain personal detailed information
Disadvantage Researcher cannot
interact with subjects and may be interpret subject’s responses incorrectly
Responses may not be completely honest biases can influence behavior.
Disadvantage Researcher cannot
interact with subjects and may be interpret subject’s responses incorrectly
Responses may not be completely honest biases can influence behavior.
Advantages And Disadvantages
Advantage Psychological
Tests:Tests provide
accurate objective information, there is little change or distorting results
Case study:Background info.
That may shed light on present behavior.
Advantage Psychological
Tests:Tests provide
accurate objective information, there is little change or distorting results
Case study:Background info.
That may shed light on present behavior.
Disadvantage
Tests are limited to the amount of info. They can obtain.
Responses not honest, biases can influence
Disadvantage
Tests are limited to the amount of info. They can obtain.
Responses not honest, biases can influence
Advantages and Disadvantages
Advantage Longitudinal Method:
Provides info needed for certain kinds of research. Ex. Developmental
Cross-sectional Method:
Representative of population as a whole less expensive and time consuming
Advantage Longitudinal Method:
Provides info needed for certain kinds of research. Ex. Developmental
Cross-sectional Method:
Representative of population as a whole less expensive and time consuming
Disadvantage
Expensive and time consuming
Not appropriate for some types of research. Ex. Developmental
Disadvantage
Expensive and time consuming
Not appropriate for some types of research. Ex. Developmental
Basic Ethical Guidelines for Psychological Research. Do no harm Ensure that participation is voluntary Remove any misconceptions caused by
deception (debrief) Provide results and interpretations to participants Accurately describe risks to potential subjects Maintain Confidentiality
Do no harm Ensure that participation is voluntary Remove any misconceptions caused by
deception (debrief) Provide results and interpretations to participants Accurately describe risks to potential subjects Maintain Confidentiality
Why do researchers sometimes use animals for their research? Many psychologist are simply interested in animal behavior. There are biological and behavioral similarities between
animals and humans. Since many species of animals develop more rapidly and
there for have shorter life spans than humans do, we can study genetic effects over generations much more rapidly in animals than in humans.
It is often possible to exercise more control over experiments with animals than is the case with humans
Procedures that are not ethical to perform on humans may be considered acceptable when performed on animals
Many psychologist are simply interested in animal behavior. There are biological and behavioral similarities between
animals and humans. Since many species of animals develop more rapidly and
there for have shorter life spans than humans do, we can study genetic effects over generations much more rapidly in animals than in humans.
It is often possible to exercise more control over experiments with animals than is the case with humans
Procedures that are not ethical to perform on humans may be considered acceptable when performed on animals