Manipulating Independent Variables
To examine whether a nonlinear relation exists (and to
●
provide a more thorough test of a potential linear relation)
three or more levels of IV must be created.
Self-perceived performance impairment as a function of
●
alcohol dose (Roehrs et al.)
EXPERIMENTAL AND CONTROL CONDITIONS
Manipulating the presence versus absence of some
○
factor
■ Participants in an experimental condition are
exposed to a treatment or active level of the IV
■ Participants in a control condition do not receive
the treatment.
Creating special control groups to address potential
○
confounding variables
To examine whether a nonlinear relation exists (and to
●
provide a more thorough test of a potential linear relation)
three or more levels of IV must be created.
Self-perceived performance impairment as a function of
●
alcohol dose (Roehrs et al.)
EXPERIMENTAL AND CONTROL CONDITIONS
Manipulating the presence versus absence of some
○
factor
■ Participants in an experimental condition are
exposed to a treatment or active level of the IV
■ Participants in a control condition do not receive
the treatment.
Creating special control groups to address potential
○
confounding variables
