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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