Single-Construct IPIP Scales

Constructs for which both the original and IPIP versions were administered to the ESCS

Scale Names Number of Items Mean Item
Intercorrelation
Coefficient Alpha Correlation Scoring
Key
      IPIP Original
Scale
IPIP Original
Scale
IPIP Original
Scale
IPIP vs.
Original Scale
 
                 
Cognitive Failures (Broadbent et al., 1982) 6 + 4=10 25 + 0=25 .27 .25 .79 .89 .63 [.75] Key
                 
BIDR (Paulhus, 1991)                
---Impression Management 10 + 10=20 10 + 10=20 .20 .18 .82 .82 .79 [.96] Key
---Self-Deception 5 + 5=10 10 + 10=20 .29 .10 .80 .68 .73 [.99] Key
                 
Locus of Control (Levenson, 1981)                
---Internality [I] 6 + 4=10 8 + 0=8 .20 .17 .71 .58 .53 [.83] Key
---Powerful Others [P] 6 + 4=10 8 + 0=8 .31 .26 .81 .72 .53 [.69] Key
---Chance [C] 6 + 4=10 8 + 0=8 .21 .26 .72 .73 .62 [.86] Key
---Total Locus of Control (I – [P + C]) 10 + 10=20 8 + 16=24 .25 .15 .86 .80 .63 [.76] Key
Locus of Control (Rational Scale) 1 + 4=5   .24   .61   .59 [.84] Key
                 
Need for Cognition (Cacioppo & Petty, 1982) 6 + 4=10 5 + 5=10 .34 .30 .84 .81 .73 [.88] Key
                 
Obsessive-Compulsive Disorder (Foa et al., 1998)                
---Need for order and cleanliness 6 + 4=10 7 + 0=7 .31 .42 .81 .83 .51 [.62] Key
---Perfectionism and intrusive thoughts 6 + 4=10 9 + 0=9 .32 .31 .82 .80 .60 [.74] Key
                 
Optimism (Scheier, Carver, & Bridges, 1994) 4 + 6=10 3 + 3=6 .39 .44 .86 .82 .69 [.82] Key
                 
Self-Consciousness (Buss, 1980)                
---Private Self-Consciousness 6 + 4=10 8 + 2=10 .30 .24 .81 .76 .76 [.97] Key
---Public Self-Consciousness 8 + 4=12 7 + 0=7 .22 .24 .77 .69 .65 [.89] Key
                 
Self-Esteem (Rosenberg, 1965) 5 + 5=10 5 + 5=10 .35 .43 .84 .87 .78 [.91] Key
                 
Self-Monitoring (Snyder, 1974) 7 + 3=10 13 + 12=25 .32 .10 .82 .74 .70 [.90] Key

Constructs for which only IPIP items were administered to the ESCSa

Scale Names Number of Items Mean Item
Intercorrelation
Coefficient Alpha   Scoring Key
                 
ADHD syndrome (Span et al., 2002) 12 + 0 = 12 ---------------- .23 ---------------- .78 ---------------- ---------------- Key
                 
Depression (Radloff, 1977) 19 + 3 = 22 ----------------   ---------------- .93 ---------------- ---------------- Key
 
Dissociation (Goldberg, 1999):                

---Full Scale

31 + 0 = 31       .90     Key
---Short Version 17 + 0 = 17       .89     Key
---Depersonalization 8 + 0 = 8       .88     Key
---Absorption 8 + 0 = 8       .75     Key
---Amnesia 5 + 0 = 5       .69     Key
Hypomanic traitsb (Eckblad & Chapman, 1986):                

---Exhibitionism

9 + 3 = 12   .26   .81     Key
---Mood intensity/change 8 + 4 = 12   .22   .77     Key
                 
Obsessive-Compulsive symptoms (Foa et al., 2002) 12 + 0 = 12 --- .26 --- .81 --- --- Key
                 
Physical Attractiveness (Rational Scale) 6 + 3 = 9   .42   .87     Key
                 

Sensation-seeking facets (Hoyle et al., 2002):

               
---Dangerous thrill-seeking 8 + 2 = 10   .40   .86     Key
---Impulsive thrill-seeking 10 + 0 = 10   .34   .84     Key
---Calculated thrill-seeking 5 + 5 = 10   .27   .78     Key
                 

Note.All analyses are based on the responses of adult participants from the Eugene-Springfield Community Sample (ESCS). For sample sizes and dates of administration of particular scales, see the ORI Technical Report Vol. 48 No. 1

[Values in brackets are the correlations between the corresponding PAS and IPIP scales when corrected for scale unreliabilities.]

aThe construction strategy for these scales differs from the strategy for most IPIP scales in that scale construction did not begin by examining correlations between items and external criteria. Rather, a mixed rational-intuitive and internal consistency strategy was used. See the Scale Construction page for more details.

bThe correlation between the two Hypomania scales is .32 [.41 when corrected for their unreliabilities]. The corresponding correlations among the three Sensation-seeking scales are: D vs. I = .47 [.55]; I vs. C = .45 [.56]; and D vs. C = .62 [.76].


References

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