Original research, methodology deep-dives, and comparison guides for personality assessments.
Big Five, DISC and Enneagram measure traits, behavior and motivation — three complementary layers. Here is what reading them together reveals that no single test can.
Spearman's g and the positive manifold, the competing explanations for it, how factor analysis turns many tests into one score, and what g does and doesn't predict.
A Five-Factor (OCEAN) guide: traits vs types, facets, validity, career cues, limits, and interpreting scores responsibly without mistaking labels for identity.
Jung's eight functions (Ne, Ni, Fi, Ti…), the 16 function stacks, Beebe's archetypes and the grip — and why function stacks are theory, not measurement.
Learn the nine Enneagram motivations as coping strategies—not cartoons: wings, instincts, ethics, relational & leadership uses, pairing with empirical measures.
RIASEC (Holland) interests explained: hexagon model, congruence evidence, pitfalls, three-letter profiles, majors/pivots—without deterministic labels.
DISC unpacked (D/I/S/C blends): behavioral focus, validity limits, meeting & feedback tweaks, teaming ethics, translating profiles into skills—not stereotypes.
EQ vs IQ decoded: overlaps, myths, trait vs ability measures, trainable empathy & regulation habits—and where emotion skills strengthen reasoning clarity.
What IQ tests measure (g and five broad indexes), what scores predict, including the 2022 revision for job performance, what they miss, and how to judge an online test.