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Single Factor Multi-Level Design
A single factor multi-level design is an experiment where one independent variable is manipulated to produce more than two distinct conditions. Researchers use this design when adding conditions can yield greater insights than a basic two-level comparison. For example, Darley and Latané's bystander experiment utilized this design by manipulating the independent variable to create three distinct conditions: a one witness condition, a two witnesses condition, and a five witnesses condition.
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Research Methods in Psychology - 4th American Edition @ KPU
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Single Factor Multi-Level Design
Which of the following correctly defines a single factor two-level design?
A study that compares the memory performance of a group that received mnemonic strategy training versus a control group that received no training is an example of a single factor two-level design.
A cognitive psychologist investigates if 'background noise' affects task performance. She asks one group of participants to solve math problems in a quiet room and another group to solve the same problems while a radio is playing loud static noise. Match the components of a Single Factor Two-Level Design to their specific roles in this study.
A researcher is studying the effect of 'Music Tempo' on heart rate by comparing a 'Slow Tempo' group to a 'Fast Tempo' group. If the researcher adds a 'Medium Tempo' group to the experiment, they have increased the number of ______, which transforms the design from a two-level design to a multi-level design.
A researcher aims to evaluate the basic effectiveness of a new mindfulness intervention using the most parsimonious (simplest and most resource-efficient) experimental design that still allows for a cause-and-effect conclusion. Rank the following proposed study designs from lowest parsimony (most complex) to highest parsimony (perfectly meeting the criteria for a Single Factor Two-Level Design).
You are tasked with synthesizing a new research protocol to investigate the impact of 'room lighting' on 'reading comprehension.' To construct a valid Single Factor Two-Level Design, which of the following experimental setups should you propose?
A 'single factor two-level design' allows a researcher to investigate the effects of two or more different independent variables within the same experiment.
A researcher investigates the impact of 'expressive writing' by comparing a 'traumatic experience' group to a 'neutral experience' group. Match each component of this Single Factor Two-Level Design to its conceptual meaning.
A researcher is analyzing the design of an experiment on expressive writing. The current setup compares three groups: a traumatic experience writing condition, a neutral experience writing condition, and a positive experience writing condition. To convert this study into a single factor two-level design, the independent variable must be modified to create exactly _____ distinct conditions.
An educational psychologist wants to evaluate the impact of a new study technique using a single factor two-level design. Arrange the steps of setting up and evaluating this experimental design in the correct logical sequence, from the initial setup of variables to the final comparison of conditions.
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What is the defining characteristic of a single factor multi-level design in an experiment?
A researcher is studying the effect of different amounts of sleep deprivation on cognitive performance. They divide participants into three groups: those who stay awake for 12 hours, those for 18 hours, and those for 24 hours. Match each element of this study to the correct term used in a single factor multi-level design.
In a study on the bystander effect, a researcher compares helping behavior in groups of 1, 3, and 6 witnesses. True or False: If the researcher had only used a study with two conditions (comparing 1 vs. 6 witnesses), their analysis would be unable to detect if the most significant drop in helping occurs when the first few bystanders are added, rather than being a steady, linear decline across all group sizes.
A researcher is evaluating the 'dose-response' relationship between caffeine intake and reaction time (). They hypothesize a curvilinear effect, where reaction time improves with small doses but worsens with very high doses. Rank the following experimental designs from least capable to most capable of capturing this specific functional relationship.
You are designing an experiment to investigate the hypothesis that caffeine has a 'non-monotonic' effect on task performance ()—meaning that performance improves with a small dose but drops off significantly with a very high dose. Which of the following experimental plans for constructing your independent variable levels would allow you to create a single factor multi-level design capable of detecting this specific non-linear trend?
A single factor multi-level design involves the manipulation of more than one independent variable.
A researcher investigates the effect of Exercise Duration on mood by assigning participants to one of four groups: 0 minutes, 15 minutes, 30 minutes, or 45 minutes of aerobic exercise. In this single factor multi-level design, the independent variable has _____ levels.
Match the following experimental descriptions with the correct design term or variable role based on the single factor multi-level design framework.
A researcher is studying bystander intervention. Rather than comparing a condition with one witness to a condition with five witnesses, the researcher decides to manipulate the independent variable to produce three distinct conditions (one, two, and five witnesses). By analyzing the effect of this single variable across more than two conditions, the researcher has applied a single factor _____ design.
Evaluate the design requirements for expanding a basic experiment into a single factor multi-level design. Order the steps a researcher must take, starting from initial variable identification to executing the expanded design.