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According to the formatting conventions of an APA-style correlation matrix, explain how variables are laid out, what symbols or values are placed in the diagonal cells, and how the upper half of the table is presented. State the specific rationale for the formatting choices of the diagonal cells and the upper half.
Question: According to the formatting conventions of an APA-style correlation matrix, explain how variables are laid out, what symbols or values are placed in the diagonal cells, and how the upper half of the table is presented. State the specific rationale for the formatting choices of the diagonal cells and the upper half.
Sample answer: In an APA-style correlation matrix, variables are listed sequentially down the leftmost column and across the top headings. The diagonal cells are filled with dashes because a variable's correlation with itself is always perfect (), making the numerical representation trivial. The upper half of the matrix is left blank to prevent redundant information, as the correlation coefficients in the upper half would simply mirror those in the lower half.
Key points:
- Variables are listed sequentially down the leftmost column and across top headings.
- Diagonal cells contain dashes instead of the value 1.00.
- The upper half of the matrix is left blank.
- The layout conventions are designed to eliminate redundant and trivial information, ensuring a concise presentation.
Rubric: The response must describe the sequential listing of variables along the leftmost column and top headings, state that diagonal cells contain dashes because self-correlation is always , and explain that the upper half is left blank to eliminate redundancy.
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Research Methods in Psychology - 4th American Edition @ KPU
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