Chapter 7: experimental design
independent variable
categorical IV
non-categorical IV
different values a variable can take on are called levels
training level
birth month
gender
likert-scale design, etc.
multiple vs one IV
one-way design: when you have one IV
when you have multiple, you describe the IV based on how many levels
randomization of groups
within subject vs btwn subject design IV
counterbalanced designs
latin square
potential problems with research designs
placebo effects
practice effects
order and sequence effects
confound/confounding variables
ceiling effects
failure to test interactions