Short Answer

A researcher is plotting the results of a Carlson and Conard replication. If the mean score for a participant group is 75.075.0 and the standard error of that mean is 1.501.50, how should they apply this standard error value to draw the vertical error bar for this data point on an APA-style line graph?

Question: A researcher is plotting the results of a Carlson and Conard replication. If the mean score for a participant group is 75.075.0 and the standard error of that mean is 1.501.50, how should they apply this standard error value to draw the vertical error bar for this data point on an APA-style line graph?

Sample answer: The researcher should draw a vertical line through the data point at 75.075.0, extending it 1.501.50 units above the point (to 76.5076.50) and 1.501.50 units below the point (to 73.5073.50).

Key points:

  • The error bar must be oriented vertically.
  • The error bar represents the standard error of 1.501.50 units.
  • The bar must extend equal distances (1.501.50 units) above and below the mean value of 75.075.0.

Rubric: The response must correctly apply the concept of vertical error bars representing standard error by indicating that the bar should extend vertically both above and below the data point by the standard error value of 1.501.50 units.

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Updated 2026-05-27

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Research Methods in Psychology - 4th American Edition @ KPU

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