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Based on the concept of plotting data with a quantitative independent variable, describe how a line graph visually represents a spreading interaction versus a cross-over interaction.
Question: Based on the concept of plotting data with a quantitative independent variable, describe how a line graph visually represents a spreading interaction versus a cross-over interaction.
Sample answer: A line graph demonstrates a spreading interaction when lines start together and diverge, indicating a growing effect at one level but not the other. A cross-over interaction is distinctly shown when the two plotted lines literally intersect and cross over each other, visually representing opposite effects across the conditions.
Key points:
- Identifies that a spreading interaction involves lines that start together and diverge.
- Notes that a spreading interaction indicates a growing effect at one level but not the other.
- Identifies that a cross-over interaction involves two plotted lines that literally intersect and cross over each other.
- Notes that a cross-over interaction represents opposite effects across the conditions.
Rubric: Full credit is awarded for correctly recalling the specific visual patterns and their meanings for both types of interactions.
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Research Methods in Psychology - 4th American Edition @ KPU
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