A Comparison Between 15 Scales in the Jackson Personality Inventory (JPI-R) and the Corresponding 15 Preliminary IPIP Scales Measuring Similar Constructs

SCALE NAMES

 

 

IPIP

JPI-R

 

 

Intellectual Complexity

Complexity

Intellectual Breadth

Breadth of Interest

Ingenuity

Innovation

Tolerance

Tolerance

 

 

Empathy

Empathy

Anxiety

Anxiety

Conformity

Cooperativeness

 

 

Sociability

Sociability

Social-Confidence

Social Confidence

Activity-Level

Energy Level

 

 

Machiavellianism

Social Astuteness

Risk-Taking

Risk Taking

 

 

Organization

Organization

Traditionalism

Traditional Values

Responsibility

Responsibility

 

 

Mean

Number
of Items

IPIP

JPI

 

 

10

20

10

20

10

20

  9

20

 

 

10

20

10

20

10

20

 

10

20

10

20

10

20

 

 

  6

20

10

20

 

 

10

20

10

20

10

20

 

 

9.7

.20

Mean Item
Intercorrelation

IPIP

JPI

 

 

.31

.09

.28

.18

.35

.26

.24

.09

 

 

.29

.14

.40

.19

.20

.16

 

.26

.18

.41

.24

.30

.15

 

 

.39

.09

.27

.21

 

 

.28

.12

.39

.15

.20

.09

 

 

.30

.16

Coefficient Alpha

IPIP

JPI

 

 

.82

.66

.79

.82

.84

.88

.73

.65

 

 

.80

.76

.87

.83

.71

.79

 

.78

.82

.87

.87

.81

.78

 

 

.79

.66

.78

.84

 

 

.79

.73

.87

.79

.69

.66

 

 

.80

.77


Correlation

IPIP vs. JPI

 

.65 [.88]

.70 [.87]

.74 [.86]

.56 [.81]

 

.64 [.82]

.71 [.84]

.71 [.95]

 

.65 [.81]

.81 [.93]

.59 [.74]

 

.42 [.58]

.70 [.86]

 

.69 [.91]

.75 [.90]

.54 [.80]

 

.66 [.84]

Note. All analyses are based on the responses of 471 adult participants from the Eugene-Springfield Community Sample. [Values in brackets are the correlations between the corresponding JPI-R and IPIP scales when corrected for attenuation due to scale unreliability.] The JPI-R includes 300 items.

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