What are the 7 research methods?
1) Experimental
2) Observational
3) Correlational
4) Case Study
5) Meta Analysis
6) Longitudinal
7) Cross Sectional
(First 4 are the main ones to worry about)
Describe experimental methods?
controlled environment (experimental and control groups), a treatment is given (IV) to see the effects (DV)
Describe correlational methods?
measures a relationship between variables, no cause and effect, measured through observation, survey, case study, and meta analysis
Describe observational methods?
gathering information by watching participants and quantifying a factor (usually wanting it to be naturalistic)
Describe case study methods
very detailed investigations of an individual or small group of people, usually regarding an unusual phenomenon or biographical event of interest to a research field.
Describe meta analysis methods?
combining information from multiple studies that already existed
Describe Longitudinal methods?
studying same participants over a long period of time
Explain cross sectional methods?
collecting data once on multiple age groups
What is operational definition?
a measurement of your variable (find how they quantify the variable in the study – use evidence, don’t “make one up).
Define it w/o bias
What is IV? DC? Confounding variable?
IV: What’s changing
DV: What’s being measured (effect)
CV: other factors that affect DV besides IV
What’s a 3rd variable?
A third factor affecting IV and DV
What’s mean?
Average
What’s median?
Middle number (meDian)
What’s Mode?
Most frequent score
What’s range?
Biggest - smallest #
What is standard deviation?
A measure of variance between scores
What’s skewness?
asymmetry of distribution, follow the tail negative(and few scores pull them down to the left) or positive(a few scores pull the average up to the right).
What is statistical significance?
Is it due to chance? More than 5% is chance
What is correlational coefficients?
Pearson r, closest to 1 is strongest
shows the strength and direction of the linear relationship between two variables