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Science

Persona Analytics is built on original psychometric assessment models developed from scratch in collaboration with nearly 30 academics from six universities.

Evidence at a glance

How Persona’s personality inventory was validated

Persona’s nine-dimensional personality inventory was developed and tested in a multi-stage validation study with 1.140 people. These are its headline results.

academics from six universities
~30
adults in two independent samples
1,140
N = 563 and N = 577
items load on their intended dimension
99 / 99
exploratory factor analysis
kept the same dominant profile after four weeks
85.1%
test–retest, n = 87
Development

How the inventory was built

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  1. 01

    Item pool

    ~160 items

    Items written to represent nine conceptually distinct personality dimensions.

  2. 02

    Expert review

    3 rounds → 110 items

    Every item checked against all eight other dimensions, and for social desirability and transparency.

  3. 03

    Field testing

    N = 563 → 99 items

    Item analysis removed 11 weak items; a four-week retest checked stability.

  4. 04

    Independent validation

    N = 577

    Reliability, factor structure, discriminant validity and convergence with an established inventory.

Methodological choices
  • Oblique rotation for related dimensions
  • DWLS estimation for ordinal answers
  • Convergence tested at four levels
  • Full results reported transparently
Reliability

High internal consistency in every dimension

Cronbach’s α for each of the nine dimensions in the independent validation sample (N = 577). Values above .90 are generally considered excellent.

Dimension 1
Dimension 2
Dimension 3
Dimension 4
Dimension 5
Dimension 6
Dimension 7
Dimension 8
Dimension 9
Data table
DimensionCronbach’s α
Dimension 1.955
Dimension 2.956
Dimension 3.947
Dimension 4.929
Dimension 5.95
Dimension 6.959
Dimension 7.948
Dimension 8.946
Dimension 9.956

McDonald’s ω gave the same range (.929–.959).

Structure

A clearly supported nine-factor structure

Confirmatory factor analysis of the nine-dimension model, compared with conventional cut-offs (DWLS, N = 577).

CFI
.994
excellent fit: ≥ .95
RMSEA
.026
close fit: ≤ .06
SRMR
.053
acceptable fit: ≤ .08
of item variance explained by nine factors
66.4%
exploratory factor analysis
Distinct dimensions

Nine dimensions that stay clearly apart

Average absolute correlation between Persona’s nine dimensions, compared with the range typically reported for earlier inventories of the same type. Lower means the dimensions measure more distinct things.

Earlier inventories, typical range .20–.50
.049 Persona inventory, mean
Data table
MeasureCorrelation between dimensions
Earlier inventories, typical range.20–.50
Persona inventory, mean.049

Persona: mean |φ| between factors = .049 (maximum .128). Typical range from published reviews (Hook et al., 2021; Newgent et al., 2004).

Stability and convergence

Consistent over time and with established measures

same dominant profile after four weeks
85.1%
n = 87
mean test–retest correlation
.954
range .930–.978
agreement with an established inventory
68.5%
n = 254
Cohen’s κ — substantial agreement
.645
p < .001

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