Final Exam Flashcards
Empirical method
a set of rules and techniques for observation
Scientific method
a procedure for finding truth by using empirical evidence.
Theory
a hypothetical explanation of a natural phenomenon
Hypothesis
a falsifiable prediction made by a theory.
Instrument
anything that can detect the condition to which an operational definition refers
Power
an instrument’s ability to detect differences or changes in the property.
Demand Characteristics
those aspects of an observational setting that cause people to behave as they think someone else wants or expects
Naturalistic observation
a technique for gathering scientific information by unobtrusively observing people in their natural environments
Observer bias
expectations can influence observations and expectations can influence reality. Observers’ expectations, then, can have a powerful influence on both the observations they make and on the behavior of those whom they observe.
Double-blind observation
an observation whose true purpose is hidden from both the observer and the person being observed
Self-selection
a problem that occurs when anything about a person determines whether he or she will be included in the experimental or control group.
Population
complete collection of people, such as the population of human beings (about 7 billion), the population of Californians (about 38 million), or the population of people with Down syndrome (about 1 million).
Sample
a partial collection of people drawn from a population
Random sampling
a technique for choosing participants that ensures that every member of a population has an equal chance of being included in the sample
Natural correlation
the correlations observed in the world around us
Third-variable correlation
two variables are correlated only because each is causally related to a third variable
Correlation versus Causation
Correlation does not necessarily mean causation
Experiment
a technique for establishing the causal relationship between variables
Manipulation
involves changing a variable in order to determine its causal power
Variable
properties whose values can vary across individuals or over time
Dependent
variable that is measured
Independent
what the experimenter will change
Experimental group
the group of people who experience a stimulus
Control group
the group of people who do not experience that stimulus