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Research Methods Test 1 > Module 4 > Flashcards

Module 4 Flashcards

Correlation

1
Q

What is correlation?

A

A relationship between data

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2
Q

What is a Pearson correlation?

A

a correlation that is used to find a linear relationship between two variables

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3
Q

What kind of variables are looked at for correlation?

A

Ratio or interval

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4
Q

What is a Pearson correlation represented by?

A

r

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5
Q

What is the range for r?

A

-1 to 1

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6
Q

True or False?
The 0.8 is a stronger correlation than 0.5.

A

True, the closer the value is to 1 or -1 the stronger the correlation

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7
Q

What does it mean if the correlation is 1 or -1?

A

The two variables have a perfect relationship

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8
Q

When are weaker correlations acceptable?

A

With psychological variables

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9
Q

When do we typically see stronger correlations?

A

With physical variables

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10
Q

What is the range of a strong correlation?

A

±0.7 to ± 1

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11
Q

What is the range of a moderate correlation?

A

± 0.5 to ± 0.69

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12
Q

What is the range of a weak correlation?

A

± 0.4 to ± 0.49

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13
Q

What is a positive correlation?

A

The variables are moving in the same direction

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14
Q

What is a negative correlation?

A

The variables are moving in opposite directions

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15
Q

What does it mean if your variables make a “blob” on a scatterplot

A

There is little or no correlation/relationship

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16
Q

How can we make a correlation meaningful?

A

Using r²

17
Q

What does r² do?

A

When you square r it gives you a variability percent.
Ex: squaring 0.74 gives you 55%
55% of the reason people differ in one variable is because they differ in another variable

18
Q

True or False?
Correlation means causation.

A

False, correlation DOES NOT mean causation.

19
Q

What is magnitude?

A

How close together the points are/ how strong the correlation is.

20
Q

What is direction?

A

Direction is if the graph is positive (going up to the right) or negative (going down to the right)

Research Methods Test 1 (10 decks)

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