Chapter 2 - Scientific Method Flashcards
Psychology as a Science - Chapter 2
Deductive reasoning
making a hypothesis based on previous knowledge to create specific conclusions. (educated guess)
Inductive reasoning
Using specific details to come up with conclusions
Empirical
Something that can be tested in objective ways
Theories
Ideas about laws and how the world works
Hypothetico-deductive reasoning
Testing educated guesses in the form of experiments and controlled observations
Hypotheses
Prediction statement that can be proven right or wrong
Psychology
Using scientific method to understand the humans’ mental processes
Pseudopsychology
Not using the scientific method to make comments about mental processes (horoscopes)
Positive psychology
Focusing on positive aspects of psychology - how to make lives more fulfilling
Multiple influences
idea that behavior cannot be explained by only one factor
Thoughts vs Behavior
Thoughts - cannot be observed directly
Behavior - can be observed directly
4 goals of psych
describe, explain, predict, and change or control behaviors
Variable
Condition, event, or situation that can be studied
Independent variable
Can be controlled and manipulated
Dependent variable
Thing we are observing -changed by independent variable
Operationalized
How the researcher decides to measure their observations
Step one in research
Identify questions
Step 2 in research
Develop hypoethesis
Step 3 in research
1) Select research method
2) Choose participants
3) Collect data
Step 4 in research
Analyze the data - reject/accept hypothesis
Step 5 in research
Seek scientific review, publish
Step 6 in research
Build a theory
Sample
Part of the population that is studied in research
Population
Entire group of interet
Random selection
Everyone in the population must have an equal chance of being chosen
Sampling bias
Selecting a group likely to confirm hypothesis
Descriptive Research
Case study, naturalistic observation, survey
Experimental research
Manipulation and control variables
Case study
Intensive study of one person
Case study - Advantage
Can develop ideas about phenomena
Case study - disadvantage
Bias, cannot generalize results
Naturalistic observation
directly observing people to see their natural behavior
Naturalistic - Advantage
accurately reflects human behavior
Naturalistic - disadvantage
Bias, hawthorne effect
Hawthorne Effect
Participants won’t behave naturally when they know they are being observed
Survey’s
Questionnaires or interviews
Survey - Advantage
Good for gathering information, measure relationship strength between variables
Survey disadvantage
Participant bias
Experimental research - advantage
establish cause and effect, eliminates outside influences
Experimental research - disadvantage
can be unethical, not generalizable
Experimental group
group exposed to manipulated environment (IV)
Control group
the group used to compare how the IV changes the DV
Random assignment
balances groups without bias
Double-blind procedure
neither the participant nor researcher knows who is in which group
Statistics
measures relationships between variables
Correlation
Show how two or more things are related to each other
Correlation coefficient
Stats that have strength in a relationship between two variables
Positive correlation
one variable increases and the other decreases
Negative correlation
one variable increases the other decreases
Perfect positive relationship
+1.00
Perfect negative relationship
-1.00
Mean
Average of the scores
Standard deviation
Differences in participants scores
Replication
testing a hypothesis multiple times
Research ethics board
Ethic police - oversee experiments
Ethics guidelines
1) Obtain consent
2) Protect participants privacy