A Comparison Between the Scales in Cattell's 16 Personality Factor Questionnaire (16PF) and the Corresponding 16 Preliminary IPIP Scales Measuring Similar Constructs
Scale Names
Number
of Items
Mean Item
Intercorrelation
Coefficient
Alpha
Correlation
                 
IPIP
16PF
IPIP
16PF
IPIP
16PF
IPIP
16PF
IPIP vs. 16PF
   
+    -         
            
Warmth Warmth (A)
7 + 3 = 10
 11 .30 .19 .80 .72 .64 [.84]
Intellect Reasoning (B)
8 + 5 = 13
 15 .20 .15 .76 .73 .51 [.69]
Emotional Stability Emotional Stability (C)
5 + 5 = 10
 10 .37 .25 .85 .76 .75 [.93]
Assertiveness Dominance (E)
6 + 4 = 10
 10 .30 .18 .81 .68 .67 [.90]
Gregariousness Liveliness (F)
6 + 4 = 10
 10 .27 .18 .78 .69 .68 [.93]
Dutifulness Rule-Consciousness (G)
5 + 5 = 10
 11 .35 .22 .84 .75 .69 [.87]
Friendliness Social Boldness (H)
5 + 5 = 10
 11 .30 .19 .80 .72 64 [.84]
Sensitivity Sensitivity (I)
6 + 4 = 10
 11 .22 .24 .73 .78 .68 [.93]
Distrust Vigilance (L)
6 + 4 = 10
 10 .29 .21 .80 .73 .57 [.75]
Imagination Abstractedness (M)
7 + 3 = 10
 11 .28 .23 .80 .76 .65 [.83]
Reserve Privateness (N)
5 + 5 = 10
 10 .39 .28 .86 .80 .74 [.89]
Anxiety Apprehension (O)
7 + 3 = 10
 10 .29 .24 .80 .76 .72 [.92]
Complexity Openness to Change (Q1)
5 + 5 = 10
 14 .32 .17 .82 .74 .69 [.89]
Introversion Self-Reliance (Q2)
7 + 3 = 10
 10 .22 .24 .73 .76 .64 [.86]
Orderliness Perfectionism (Q3)
5 + 5 = 10
 10 .31 .22 .81 .74 .77 [.99]
Emotionality Tension (Q4)
7 + 3 = 10
 10 .24 .24 .76 .76 .59 [.78]
                 
Mean
5 + 5 = 10
 11 .29 .21 .80 .74
.66 [.86]
                 
Note. All analyses are based on the responses of 501 adult subjects from the Eugene-Springfield Community Sample. [Values in brackets are the correlations between the corresponding 16PF and IPIP scales when corrected for attenuation due to scale unreliability.]
 
Note. The numbers under the " +   -" heading indicate the number of positively and negatively items in the scale. So, for example, "5+3=8" indicates that there are 5 positively keyed items and 3 negatively keyed items, for 8 total items.
 
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