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Cross-over Interaction
A cross-over interaction occurs when an independent variable has an effect at both levels of a second independent variable, but these effects operate in completely opposite directions. In graphical representations, this type of interaction is visually distinctive because the lines plotting the different conditions will physically intersect and cross over each other.
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Research Methods in Psychology - 4th American Edition @ KPU
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Spreading Interaction
Cross-over Interaction
Graphing Interactions
In a factorial research design, which of the following best describes a cross-over interaction?
A researcher finds that a new studying technique improves test scores for students with high anxiety, but has absolutely no effect on test scores for students with low anxiety. This pattern is an example of a cross-over interaction.
A researcher is analyzing the results of a 2x2 factorial experiment investigating how 'Instructional Method' (Direct Instruction vs. Problem-Based Learning) and 'Prior Knowledge' (Low vs. High) interact to affect exam scores. Arrange the analytical steps in the correct logical order to determine if a cross-over interaction is present.
A researcher is constructing a model of 'In-Group Cooperation' that predicts a 'spreading interaction' between 'Incentive Structure' (Group vs. Individual) and 'Team Identity' (High vs. Low). Specifically, group incentives are hypothesized to significantly boost effort compared to individual incentives only for 'High Identity' teams, with no difference for 'Low Identity' teams. To synthesize a data table for this theory, which set of mean effort scores (on a scale of to ) should the researcher generate?
In a factorial research design, a spreading interaction is characterized by one independent variable having opposite effects depending on the level of a second independent variable.
A researcher evaluates a claim that a specific study technique is 'universally superior' for all students. The data show the technique improves performance for students with high prior knowledge but hurts performance for students with low prior knowledge. Because the direction of the effect reverses across groups, the researcher identifies this pattern as a(n) _____ interaction.
Match each pattern of results from a factorial design with the description that best characterizes how the effect of one independent variable relates to the levels of a second independent variable.
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Example of a Cross-over Interaction
Graphing Interactions
How is a cross-over interaction defined in the context of factorial designs?
A researcher finds that background music increases the productivity of employees performing simple, repetitive tasks but decreases the productivity of employees performing complex, cognitive tasks. Because the effect of the music reverses direction depending on the type of task, a graph of these results would show a cross-over interaction.
A researcher discovers a cross-over interaction between 'Audience Presence' (Alone vs. Observed) and 'Skill Level' (Expert vs. Novice) regarding performance accuracy. Match each element of this study to the characteristic that would produce this specific interaction pattern.
A researcher investigates the interaction between 'Room Temperature' (Cold vs. Hot) and 'Beverage Preference' (Hot Soup vs. Iced Water). In a 'Cold Room', participants rate 'Hot Soup' as significantly more enjoyable than 'Iced Water'. To qualify as a cross-over interaction, the enjoyment ratings for 'Iced Water' in a 'Hot Room' must be ________ than the ratings for 'Hot Soup'.
A researcher is evaluating whether a dataset from a factorial study constitutes a cross-over interaction. Arrange the evaluative steps in the correct logical order to justify concluding that this specific interaction pattern is the most accurate description of the relationship.
A researcher is designing a new experiment to test how 'Textbook Format' (Digital vs. Print) interacts with 'Student Preference' (Prefer Digital vs. Prefer Print) to affect 'Exam Scores'. To construct a cross-over interaction in this study's design, which hypothesis should the researcher propose?
A ________ interaction occurs when an independent variable has an effect at both levels of a second independent variable, but these effects operate in completely opposite directions.
A researcher examines how study environment (Quiet vs. Noisy) interacts with learning style (Visual vs. Auditory) on test scores. Visual learners score higher in the Quiet condition than the Noisy condition, while Auditory learners score higher in the Noisy condition than the Quiet condition. The researcher concludes that a cross-over interaction has occurred.
A researcher plots results from a 2×2 factorial study. Analyze each interaction graph pattern described below and match it to the correct interpretation.
A student is critically evaluating a published study in which the authors claim to have found a cross-over interaction in a 2×2 factorial design. Arrange the evaluative steps in the correct logical order to judge whether the authors' claim is justified.
Define a cross-over interaction in terms of the effects of independent variables in a factorial design, and describe how this type of interaction is visually represented on a graph.
Based on this scenario, explain why these findings demonstrate a cross-over interaction. In your explanation, link the specific experimental outcomes to the definition of a cross-over interaction and describe the graphical representation.
A researcher is planning an experiment investigating how 'Study Environment' (Quiet vs. Noisy) and 'Student Personality' (Introvert vs. Extrovert) interact to affect exam scores. If Introverts perform better in a Quiet environment than a Noisy environment, predict the performance pattern for Extroverts that would be required to produce a cross-over interaction, and describe what the graphed lines would do.