Random assignment is used to control order effects in a within-subjects experiment.

The concept of degrees of freedom is associated with the ____.

Where are needles typically placed when loading a suture on a needle holder?

What should the ST have ready to hand to the surgeon after the incision for hemostasis?

In a between-subjects design, individual differences (participant variables) are a problem because they can ____.

A two-factor experimental design evaluates two main effects and one interaction.

An experiment comparing a treatment condition with a no-treatment control condition has no independent variable.

Nonexperimental studies always contain a threat to internal validity, which means that these studies cannot establish unambiguous cause-and-effect relationships.

In an observational study of autistic children, you record how much time each child spends playing alone during a 30-minute observation period. This is an example of the ____ method of quantifying behavior.

Last fall, a state college introduced a one-week study skills course for new freshmen students. At the end of the academic year, the college compared the grades and dropout rate for their freshmen with the corresponding measurements for freshmen at a neighboring state college. This study is an example of a ____.