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The Science of Psychology
Chapter 1
Introduction and Research Methods
Module Objectives
Why is Psychology a Science?
What is the scientific method?
How do researchers design a study?
Why should I believe what researchers say?
Let’s Start with Some Critical Thinking
Psychology requires the ability to think
critically about different problems.
Consider the following scenarios and use
your critical thinking skills!
A man is found hanging in an
otherwise empty locked room
with a puddle of water under
his feet.
How did he do it?
Did you get it?
He stood on a block of ice until it melted,
which explains the puddle under his
feet!
Try this one…
A policeman was walking past a house. He heard
someone cry, "Don't shoot me, John! Don't shoot!"
There was one gunshot. The policeman entered
the house and saw a lawyer, priest, and an
engineer, gathered around a dead body. The priest
was immediately arrested.
‐ How did the policeman know?
What DO you think?
The police officer knows that the
Priest is John because the lawyer and
the engineer were both WOMEN!
The Science of Psychology
When Psychologists perform research
they begin by asking questions
The Science of Psychology
Psychology is based on two premises of
science:
1. Empiricism
 Acquiring information through careful observation
2. Theory development:
 Collecting interrelated ideas and observations
Psychology as a Science
Psychologists must engage in careful observation
when studying behavior and mental processes
What does that mean?
‐ They must put aside personal feelings or biases
‐ They must gather information systematically
‐ They must be able to replicate their results
Systematic observation is setting up
our study so that we eliminate or
reduce bias.
“We must keep our minds open
but not so open that our brain
falls out.” (Oberg, 1995)
Why can’t scientists base
their research off of casual,
everyday observations?
(People watching)
Skepticism combines two opposing
attitudes:
‐ an openness to new ideas combined with a
willingness to subject these claims to
scrutiny.
Everyday Observations
What appears on the back of a $1 bill?
What is the shape of a stop sign?
What way does Lincoln face on the penny?
In which hand does the Statue of Liberty hold her
torch?
How many tines are there on a regular dinner fork?
What shape is the Garden State Parkway sign?
How Did You Do?
1. On the back of a dollar bill you will find 2 circles which
make up the Great Seal of the US:
‐ left circle is the pyramid with the eye and the right circle is the
bald eagle
2. A stop sign is an octagon (8-sides)
3. Lincoln faces to the right on the penny
4. Lady Liberty holds the torch in her right hand
5. There are four tines on a dinner fork
6. The GSP sign is a circle
What we casually observe
without a systematic plan can
often be inaccurate.
Answer the following questions to illustrate
this point…don’t cheat 
Unfortunately, casual observation is
subject to bias that can distort
information
We notice behavior that fits our
stereotypes
Why is Research Conducted?
The purpose of scientific research is to
create new knowledge and increase our
understanding of human behavior.
‐ This knowledge is applied in all areas of society
to provide solutions.
In science, research strategies are categorized
as either basic or applied.
Basic research is designed to advance general
understanding
Applied research is designed to solve practical
problems
How Do Scientists
Collect and Evaluate Evidence?
Psychologists follow strict,
standardized scientific
procedures so that others can
understand, interpret and repeat
their findings
Science is derived from the
Latin word meaning knowledge.
We gain scientific knowledge by testing
hypotheses. Research designed to test
hypotheses goes through a series of steps…
Psychologists follow strict,
standardized scientific procedures
so that others can understand,
interpret and repeat/test their
findings
This process involves several specific steps
to ensure the results are valid
How is research conducted?
The Scientific Method allows psychologists to
explore psychological issues systematically
by using objective means
Think on your own…
What does it mean to be OBJECTIVE?
The scientific method is a tool box of
skills that scientists have developed
to prevent themselves from
confirming their own biases
The Scientific Method
1. Formulate a research question by stating a question and performing
a literature review
2. Develop a operationally defined and testable hypothesis
3. Research Design is selected to test the hypothesis
4. A statistical analysis must be performed on the data to determine if
the findings support or reject the hypothesis.
5. The research is published in a peer-reviewed scientific journal.
6. After one or more studies on a topic, researchers generally advance
a theory to explain their results.
chapter 1 introduction and research methods: the science of psychology
Scientific Method in Psychology
Before research begins, a problem must be
identified
‐ Researchers then perform a literature review and
look at previously performed work.
The Psychologist must choose and formulate
a question to be answered.
Make a Prediction!
2. Develop a testable hypothesis, or a specific
prediction about how one factor is related to
another.
This MUST be a testable prediction that is
operationally defined-meaning the variables in
are stated precisely in measurable terms.
‐ Example: Drinking excessive amounts of caffeine
before the exam will increase my score.
Students often discuss wonderful
questions they would like to
research, but what’s crucial in this
research process is that the
question be testable.
How to make a testable prediction is
where the challenge lies…
Let’s practice
What is a testable hypothesis for this
nursery rhyme?
Jack and Jill went up a hill to fetch a pail of water.
Jack fell down and broke his crown. Jill came
tumbling after.
What is your Hypothesis?
What could help us understand why Jack and
Jill fell down the hill?
Perhaps we could hypothesize that fetching water
causes falls.
‐ There is a correlation or a relationship between the
terrain and the likelihood of falling.
Or…Perhaps…this explains the fall…
The hypothesis must be
testable, but also operationally
defined
These allow a more specific
measurement by defining a numerical
value.
Operational definitions allow
Psychologist’s to study intangible
concepts by making them more
concrete, countable, and
observable.
Examples of
Operational Definitions
Aggressive behavior – the number of times a child punches a
punching bag over the course of one hour
Happiness – the number of times a person smiles while
watching a Disney movie
Intelligence – a score on an IQ test
Anxiety – the number of pencils a student brings to an
exam
Try this on your own…
Operationally define the
following
-Sadness
-Creativity
Next…
Research Methods

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chapter 1 introduction and research methods: the science of psychology

  • 1. The Science of Psychology Chapter 1 Introduction and Research Methods
  • 2. Module Objectives Why is Psychology a Science? What is the scientific method? How do researchers design a study? Why should I believe what researchers say?
  • 3. Let’s Start with Some Critical Thinking Psychology requires the ability to think critically about different problems. Consider the following scenarios and use your critical thinking skills!
  • 4. A man is found hanging in an otherwise empty locked room with a puddle of water under his feet. How did he do it?
  • 5. Did you get it? He stood on a block of ice until it melted, which explains the puddle under his feet!
  • 6. Try this one… A policeman was walking past a house. He heard someone cry, "Don't shoot me, John! Don't shoot!" There was one gunshot. The policeman entered the house and saw a lawyer, priest, and an engineer, gathered around a dead body. The priest was immediately arrested. ‐ How did the policeman know?
  • 7. What DO you think? The police officer knows that the Priest is John because the lawyer and the engineer were both WOMEN!
  • 8. The Science of Psychology When Psychologists perform research they begin by asking questions
  • 9. The Science of Psychology Psychology is based on two premises of science: 1. Empiricism  Acquiring information through careful observation 2. Theory development:  Collecting interrelated ideas and observations
  • 10. Psychology as a Science Psychologists must engage in careful observation when studying behavior and mental processes What does that mean? ‐ They must put aside personal feelings or biases ‐ They must gather information systematically ‐ They must be able to replicate their results
  • 11. Systematic observation is setting up our study so that we eliminate or reduce bias.
  • 12. “We must keep our minds open but not so open that our brain falls out.” (Oberg, 1995)
  • 13. Why can’t scientists base their research off of casual, everyday observations? (People watching)
  • 14. Skepticism combines two opposing attitudes: ‐ an openness to new ideas combined with a willingness to subject these claims to scrutiny.
  • 15. Everyday Observations What appears on the back of a $1 bill? What is the shape of a stop sign? What way does Lincoln face on the penny? In which hand does the Statue of Liberty hold her torch? How many tines are there on a regular dinner fork? What shape is the Garden State Parkway sign?
  • 16. How Did You Do? 1. On the back of a dollar bill you will find 2 circles which make up the Great Seal of the US: ‐ left circle is the pyramid with the eye and the right circle is the bald eagle 2. A stop sign is an octagon (8-sides) 3. Lincoln faces to the right on the penny 4. Lady Liberty holds the torch in her right hand 5. There are four tines on a dinner fork 6. The GSP sign is a circle
  • 17. What we casually observe without a systematic plan can often be inaccurate. Answer the following questions to illustrate this point…don’t cheat 
  • 18. Unfortunately, casual observation is subject to bias that can distort information We notice behavior that fits our stereotypes
  • 19. Why is Research Conducted? The purpose of scientific research is to create new knowledge and increase our understanding of human behavior. ‐ This knowledge is applied in all areas of society to provide solutions.
  • 20. In science, research strategies are categorized as either basic or applied. Basic research is designed to advance general understanding Applied research is designed to solve practical problems
  • 21. How Do Scientists Collect and Evaluate Evidence?
  • 22. Psychologists follow strict, standardized scientific procedures so that others can understand, interpret and repeat their findings
  • 23. Science is derived from the Latin word meaning knowledge. We gain scientific knowledge by testing hypotheses. Research designed to test hypotheses goes through a series of steps…
  • 24. Psychologists follow strict, standardized scientific procedures so that others can understand, interpret and repeat/test their findings This process involves several specific steps to ensure the results are valid
  • 25. How is research conducted? The Scientific Method allows psychologists to explore psychological issues systematically by using objective means Think on your own… What does it mean to be OBJECTIVE?
  • 26. The scientific method is a tool box of skills that scientists have developed to prevent themselves from confirming their own biases
  • 27. The Scientific Method 1. Formulate a research question by stating a question and performing a literature review 2. Develop a operationally defined and testable hypothesis 3. Research Design is selected to test the hypothesis 4. A statistical analysis must be performed on the data to determine if the findings support or reject the hypothesis. 5. The research is published in a peer-reviewed scientific journal. 6. After one or more studies on a topic, researchers generally advance a theory to explain their results.
  • 29. Scientific Method in Psychology Before research begins, a problem must be identified ‐ Researchers then perform a literature review and look at previously performed work. The Psychologist must choose and formulate a question to be answered.
  • 30. Make a Prediction! 2. Develop a testable hypothesis, or a specific prediction about how one factor is related to another. This MUST be a testable prediction that is operationally defined-meaning the variables in are stated precisely in measurable terms. ‐ Example: Drinking excessive amounts of caffeine before the exam will increase my score.
  • 31. Students often discuss wonderful questions they would like to research, but what’s crucial in this research process is that the question be testable. How to make a testable prediction is where the challenge lies…
  • 32. Let’s practice What is a testable hypothesis for this nursery rhyme? Jack and Jill went up a hill to fetch a pail of water. Jack fell down and broke his crown. Jill came tumbling after.
  • 33. What is your Hypothesis? What could help us understand why Jack and Jill fell down the hill? Perhaps we could hypothesize that fetching water causes falls. ‐ There is a correlation or a relationship between the terrain and the likelihood of falling.
  • 35. The hypothesis must be testable, but also operationally defined These allow a more specific measurement by defining a numerical value.
  • 36. Operational definitions allow Psychologist’s to study intangible concepts by making them more concrete, countable, and observable.
  • 37. Examples of Operational Definitions Aggressive behavior – the number of times a child punches a punching bag over the course of one hour Happiness – the number of times a person smiles while watching a Disney movie Intelligence – a score on an IQ test Anxiety – the number of pencils a student brings to an exam
  • 38. Try this on your own… Operationally define the following -Sadness -Creativity

Editor's Notes

  • #3: One person has to know the full story, and other people have to figure out the missing pieces by asking questions. There is only one restriction on the question you can ask. The question must be a question that can be answered with either a "yes" or a "no". Apart from that you can ask anything. As you can imagine, at the beginning, the people asking know very little and the questions asked can be totally irrelevant to the story. Most people I know will answer such questions with "It's not relevant" to stop people going down totally dead ends. On the other hand, it adds to the challenge if you don't get hints like this. He stood on a block of ice to hang himself. Both the engineer and lawyer were female, the priest was male, so the policeman was fairly sure that he was the one referred to as "John“. Clues: the man lives in an isolated place, and the people depended on him doing his job for their safety. He did not know the people... Solution: The man is a lighthouse keeper who forgot to turn the light on the previous evening. He sees the ships that have been shipwrecked during the night... Clues: The office is locked from the inside - no-one has directly killed him. He was poisoned... Solution: The seal on the envelope was poisoned, so when he licked and sealed it, he was poisoned... Clues: What are you assuming? Solution: It's daytime... Both scientific thinking and riddle solving attempt to make sense of data that may initially appear contradictory. Focus your creative energies on just a few topic areas that you genuinely care about, and work on these areas purposefully for several weeks or months. · Avoid being too narrow in the way you define your problem or topic areas; try to use broader definitions, and see what insights you gain. · Try to come up with original and useful ideas by making novel associations among things that you already know.
  • #15: 2 circles which make up the Great Seal of the US – left circle is the pyramid with the eye and the right circle is the bald eagle 6 (fun fact – a piece of wood can make 8 cylinder pencils or 9 six-sided pencils) Octagon 8-sides To the right In her right hand Four Circle
  • #21: Science is derived from the Latin word meaning knowledge. We gain scientific knowledge by testing hypotheses. Research designed to test hypotheses goes through a series of steps…
  • #27: Steps to the scientific method: Choose and formulate a question to be answered On the basis of previous research or a particular theory, pose a question about development Develop a hypothesis regarding the question MUST BE TESTABLE Developing a method for testing the hypothesis Design and conduct a research project that will provide evidence (in the form of data) about the hypothesis Using the data yielded by the method to draw conclusions regarding the hypothesis Use the evidence to support or refute the hypothesis Describe the limitations of the research Provide any alternative explanations for the results Make the findings available Publish the research Describe the procedure and the results in sufficient detail that other scientists can evaluate the conclusions or replicate the reearch
  • #32: What is a testable hypothesis for each? How would you go about testing it? Examples: Fetching water causes falls; There is a correlation between the terrain and the likelihood of falling.. Examples: Appearance of a spider causes fear; Eating curds and whey causes fear.
  • #36: These definitions allow psychologists the ability to study intangible concepts such as memory, assertiveness, and happiness by making them more concrete, countable, and observable A definition that specifies the operations (or procedures) used to produce or measure something – a way to give a numerical value
  • #37: CLASS EXAMPLE: Have people give definitions for: Sadness Depression Creativity