Which of the following best describes the structure of a mixed factorial design?

A researcher studies the effects of 'Therapy Type' (Behavioral vs. Cognitive) and 'Treatment Duration' (2 weeks vs. 4 weeks) on anxiety levels. Each participant is randomly assigned to receive only one type of therapy. However, every participant's anxiety is measured twice: once at the 2-week mark and again at the 4-week mark. This experimental setup is an example of a mixed factorial design.

A researcher is planning a mixed factorial design with two independent variables: 'Room Lighting' (Dim vs. Bright) and 'Task Complexity' (Simple vs. Complex). 'Room Lighting' is manipulated between-subjects, while 'Task Complexity' is manipulated within-subjects. If the researcher wants to have 25 participants in each of the four possible treatment combinations, the total number of unique participants required for the study is ________.

Arrange the following steps in the logical order required to evaluate the methodological justification for choosing a mixed factorial design in a study on 'Instructional Method' (Visual vs. Auditory) and 'Trial Number' (Trial $1$ through Trial $10$).

You are planning an experiment to investigate how 'Feedback Style' (Encouraging vs. Critical) and 'Trial Sequence' (Trial $1$ vs. Trial $2$) affect task persistence. Your research goals require that you: (1) measure the specific change in persistence for every individual participant across the two trials, and (2) ensure that no participant is exposed to both feedback styles during the study. Which of the following experimental plans correctly constructs a mixed factorial design to meet these requirements?

An experimental design that includes at least one between-subjects independent variable and at least one within-subjects independent variable is called a ________ factorial design.

In a mixed factorial design, a single independent variable is manipulated both between-subjects (for some participants) and within-subjects (for other participants).

A researcher studies how 'Noise Level' (Quiet vs. Loud) and 'Task Difficulty' (Easy vs. Hard) affect concentration. All participants complete tasks under both the Quiet and Loud conditions, but each participant performs either only Easy tasks or only Hard tasks. Match each term to its correct description within this study.

A researcher conducts an experiment to investigate how 'Font Style' (Arial vs. Comic Sans) and 'Reading Medium' (Paper vs. Screen) affect reading comprehension. All participants read texts in both Arial and Comic Sans, but each participant reads exclusively on either Paper or Screen. Analyze this scenario and match each element of the study to its correct methodological description.

A researcher is evaluating how to systematically implement a mixed factorial design to test the effects of cell phone use (with vs. without a cell phone) and time of day (day vs. night) on driving ability. Order the following methodological steps from the initial design choice to the final validation of participant testing.