Question

When you use a between-subjects design, the order of conditions is (sort of) held constant because every condition is run first. Another way to look at this is in terms of carry-over effects: this is also held constant at "impossible" since only one condition is run on each subject

Answer 1

A between-subjects design involves running each condition first for each subject, eliminating carry-over effects. Random assignment of participants to treatment groups helps reduce lurking variables and establish cause-and-effect relationships.

Step-by-step explanation:

A between-subjects design is an experimental design in which each participant is only exposed to one condition or treatment. In this design, the order of conditions is held constant because every condition is run first for each subject. This helps eliminate carry-over effects and ensures that each condition is only experienced by one subject. Random assignment of participants to treatment groups helps to reduce the influence of lurking variables and ensures that any differences observed in the outcome variable are a result of the different treatments.