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When presenting the outcomes of a $$t$$-test in a research manuscript, specific APA style formatting conventions must be followed. The results are typically written in the format: $$t(df) = \text{t-score}, p = \text{p-value}$$. For instance, a result might be reported as $$t(9) = -3.07, p = .01$$. In this structure, the letters $$t$$ and $$p$$ must be italicized. The degrees of freedom ($$df$$) are placed in parentheses immediately following the $$t$$ symbol, and must be presented as a whole number without any decimal remainder. Finally, both the calculated $$t$$ score and the $$p$$-value are rounded to two decimal places.

Reporting t-Test Results in APA Style

When presenting the outcomes of a t-test in APA style, to how many decimal places should both the calculated t score and the p-value typically be rounded?

A psychology student reports the following t-test result in a research paper: t(14.00) = 2.45, p = .03. This is correctly formatted because all numerical values have been consistently rounded to two decimal places.

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