Psychology Final Flash Cards
What is hindsight bias?
when you say oh yea i knew that was going to happen, after it happens
What is the Gambler’s Fallacy
finding patterns when they don’t really exist
What are the three goals of psychology?
- Measurement and Description
- Understanding and Prediction
- Application and Control
What is a theory?
A broad explanation or prediction concerning phenomena of interest; an integrated set of principles
What is a hypothesis?
A prediction stated in a way that allows it to be tested; more specific than a theory
Explain the Scientific Method
Specific hypotheses are derived from broad theories and then tested to form more defined theories, not all theories are testable (Freud) - you can never completely prove a theory - operational definitions make abstract concepts measurable and observable (instead of saying I’m hungry, say I haven’t eaten for 6 hours)
List four types of operational definitions
- self reports (questionnaires)
- response performance (reaction time, tests)
- physiological measures
- unobtrusive behavioral measures (how close someone sits, eye contact, smiling)
Descriptive Study - Case Study
An intensive study of one or a few individuals. Interviews, test, observations and more can all be part of the case study.
Observational Study - Surveys
Representative sample of population: individuals in a sample should math the type of people in population you wist to generalize to. Phrasing of questions is important. Random Sample.
Correlational Studies
Way of determining the degree of association between two variables. Correlation coefficient tells you about the relationship, the strength and direction.
What is something very important to remember about correlation studies?
Correlation does not imply causation
Describe an experiment
When a relationship between two or more variables is investigated by deliberately producing a change in one variable in a situation and observing the effects of a situation. The investigator changes some factors, keeping others constant and measures the effects on randomly assigned subjects.
Define dependent variable
The variable is dependent on the influence of the experiment. The variable being measured in an experiment.
Define independent variable
Variable that researcher manipulates in an experiment, can cause change in the dependent variable. There can be multiple levels (at least two) - levels are the same as groups or conditions
What is the control variable or group in an experiment?
They are not exposed to experimental treatment but their results are still measured
Define random assignment
each participant has equal chance of being in each level of independent variable
Define Interaction
qualifying a statement about a variable by taking another variable into account: the combination of variables has an effect
What is a confounding variable?
a variable that is not held constant across all levels (groups) of the independent variable (a confounding variable destroys internal validity)
Internal and External Validity
High internal validity - when the change in the dependent variable is the result of the independent variable only; a well designed experiment
High External Validity - when your results generalize broody to other situations or people
Experimenter effects or experimenter bias
when the experimenter unintentionally biases or influences the experiment, destroying internal validity
List the two different experimenter effects
single blind: participants don’t know the hypothesis
double blind: in addition, experimenters don’t know what condition participants are in
Descriptive Statistics
when you describe a group via central tendency and variability
Inferential Statistics
how likely results occurred by chance
Define sensation
the conversion of the stimulus to neural impulses