Essay

Based on the visual benchmarks for Pearson's rr described in the text, recall and describe the scatterplot appearance of the following: a perfect negative relationship (r=1.00r = -1.00), a moderate negative relationship (r=0.50r = -0.50), no relationship (r=0r = 0), a moderate positive relationship (r=+0.50r = +0.50), and a perfect positive relationship (r=+1.00r = +1.00).

Question: Based on the visual benchmarks for Pearson's rr described in the text, recall and describe the scatterplot appearance of the following: a perfect negative relationship (r=1.00r = -1.00), a moderate negative relationship (r=0.50r = -0.50), no relationship (r=0r = 0), a moderate positive relationship (r=+0.50r = +0.50), and a perfect positive relationship (r=+1.00r = +1.00).

Sample answer: According to the visual benchmarks, a perfect negative relationship (r=1.00r = -1.00) is shown as a tight, downward-sloping straight line. A moderate negative relationship (r=0.50r = -0.50) shows points loosely clustered around a downward trend. No relationship (r=0r = 0) appears as a shapeless cloud of points. A moderate positive relationship (r=+0.50r = +0.50) shows a loose upward trend. Finally, a perfect positive relationship (r=+1.00r = +1.00) features points falling exactly on an upward-sloping diagonal line.

Key points:

  • A perfect negative relationship (r=1.00r = -1.00) is depicted as a tight, downward-sloping straight line.
  • A moderate negative relationship (r=0.50r = -0.50) shows points loosely clustered around a downward trend.
  • A value of r=0r = 0 appears as a shapeless cloud of points, indicating no relationship.
  • A moderate positive relationship (r=+0.50r = +0.50) shows a loose upward trend.
  • A perfect positive relationship (r=+1.00r = +1.00) features points falling exactly on an upward-sloping diagonal line.

Rubric: To receive full credit, the response must correctly state the visual representation for all five Pearson's rr benchmarks: tight downward-sloping line for 1.00-1.00, loose downward cluster for 0.50-0.50, shapeless cloud for 00, loose upward trend for +0.50+0.50, and points exactly on an upward diagonal for +1.00+1.00.

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Updated 2026-05-27

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KPU

Research Methods in Psychology - 4th American Edition @ KPU

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