What is the defining characteristic of a between-subjects factorial design?

In a between-subjects factorial design studying the effects of 'Caffeine' and 'Sleep Deprivation' on memory, match each study component to the correct description of how it functions in this specific design.

A researcher investigates how study environment (quiet room vs. noisy café) and caffeine consumption (caffeinated drink vs. no caffeine) affect reading comprehension scores. Each participant is randomly assigned to exactly one condition — for example, quiet room with no caffeine — and is tested only once. Based on this setup, the study uses a between-subjects factorial design.

A researcher conducts a study using a between-subjects design with two independent variables, each having three levels (a 3 x 3 structure). Each unique experimental condition is assigned a group of 10 participants. Arrange the following components in order based on the total number of unique participants they represent, from the fewest individuals to the most.

A lead investigator is evaluating the design for a study on the interactive effects of two distinct psychiatric medications. They determine that because the medications have persistent, long-term physiological effects, participants cannot be returned to their original baseline once exposed to a specific treatment. To ensure the study's validity by requiring each participant to be assigned to only one unique combination of independent variables, the investigator must select a(n) ________-subjects factorial design.

Suppose you are constructing a $2 imes 2$$ between-subjects factorial design to investigate how 'Music Type' (Classical vs. Rock) and 'Exercise Intensity' (Low vs. High) interact to influence heart rate. You have already established three independent groups:

1. Classical - Low
2. Classical - High
3. Rock - Low

To complete the creation of this design while strictly adhering to the between-subjects requirement, which of the following actions must you take?

In a between-subjects factorial design, each participant is exposed to multiple combinations of the independent variables' levels.

Match each core component of a between-subjects factorial design with its corresponding role or definition in the study.

When researchers switch from a within-subjects to a between-subjects factorial design, the critical structural change is that each participant is now tested in _____ of the experimental conditions, which eliminates potential carryover effects but requires a larger overall sample to fill the separate groups.

A researcher is deciding whether a between-subjects factorial design is appropriate for a study on how background noise (present vs. absent) and task complexity (simple vs. complex) affect problem-solving accuracy. Arrange the following evaluative steps in the most defensible logical order for making this design decision.

Recall and state the defining characteristic of a between-subjects factorial design. How does participant exposure to conditions work in this specific type of experimental structure?

Based on the case context, demonstrate your comprehension of this design by explaining what happens to a participant who is assigned to drive with a cell phone during the day. In your explanation, specify whether this participant will ever drive without a cell phone or drive at night during the study, and explain why based on the design type.

Apply the structure of a between-subjects factorial design to a new $2 \times 2$ study investigating the effects of caffeine (caffeine vs. placebo) and room temperature (hot vs. cold) on test performance. In one to three sentences, describe how a single participant's exposure to the experimental conditions would be configured.