Psychology 111- Chapter 2 Flashcards
experiment
experimenter has to be able to change/control the independent variable, has to randomly assign participants
quasi-experiment
when one of the independent variables cannot be manipulated or when participants cannot be randomly assigned
cross-sectional
think there is going to be a change in development, test at certain ages (only at those ages not in between) at one specific time
naturalistic
observation- unobtrusively observing participants (don’t know that they are being observed)
survey
asking people to answer questions, data comes from their responses
between-subjects
looking for changes between subjects (each participant exposed to 1 level of independent variable)
withing-subjects
looking for changes within a participant (1 subject)- expose participant to every level of independent variable
reliability
the same response, number, etc. across repeated testing
validity (internal vs. external)
are you measuring the concept you think you’re measuring
- internal: the amount of control the experimenter has on their study(the confidence they have that the independent variable caused change in dependent variable)
- external: how similar your phenomena look to the real world
Sample vs. Population
- sample: participants that are participating in your research
- population: larger group the sample is coming from (only people you can apply findings to are where the sample comes from (population)
WEIRD
western, educated, industrialized, rich, democratic populations where most populations are from
self-selection
because participants are choosing to participate in the study, they are different than the people who decided not to participate
bias
a lot of psychology studies are done on college students (college students are different than a lot of other in a population)
Descriptive stats
describe what our data look like (mean, median, mode
inferential stats
tells us there is a significant difference in our data (t-test, f-test, p-value)