Lionetti et al. (2018) — Dandelions, Tulips and Orchids

sourceUpdated 2026-06-15
orchids-dandelionsdifferential-susceptibilityenvironmental-sensitivitytemperamentlatent-profile-analysisHSPPluessLionetti
Related: Orchids, Dandelions, and Tulips (Differential Susceptibility), Antifragility and the Black Swan (Taleb Framework), Window of Tolerance, The Predictive Body (Predictive Processing)

Lionetti et al. (2018) — Dandelions, Tulips and Orchids

Full title: Dandelions, tulips and orchids: evidence for the existence of low-sensitive, medium-sensitive and high-sensitive individuals
Authors: Francesca Lionetti, Arthur Aron, Elaine N. Aron, G. Leonard Burns, Jadzia Jagiellowicz, Michael Pluess
Journal: Translational Psychiatry 8, 24
Year: 2018
DOI: 10.1038/s41398-017-0090-6
Type: Empirical study (Confirmatory Factor Analysis + Latent Class Analysis)
Ingested: 2026-06-15

Summary

  • Primary sample: 906 adults (psychology undergraduates, Stony Brook University, USA; mean age 19.20, 62.3% female), cross-validated with two subsamples
  • Follow-up sample: 230 adults (Queen Mary University, London) for Big Five personality and emotional reactivity characterization
  • Measure: 27-item Highly Sensitive Person (HSP) scale (Aron & Aron), α = 0.89
  • Bifactor model confirmed: general sensitivity factor + three subscales (Ease of Excitation, Aesthetic Sensitivity, Low Sensory Threshold)
  • Latent class analysis: three-group model fit significantly better than two-group model

Key Findings

Population Proportions (Empirical)

  • Orchids (High Sensitivity): 31%
  • Tulips (Medium Sensitivity): 40%
  • Dandelions (Low Sensitivity): 29%

Note: These are the empirically-derived proportions. Preliminary cut-off scores for all three groups are provided in the paper.

Big Five Personality Differences

  • Orchids vs. other groups: significantly higher neuroticism, significantly lower extraversion, higher openness (trend)
  • Dandelions also differed significantly from Tulips (not just from Orchids)
  • Emotional reactivity (mood induction task): Orchids showed higher reactivity to positive mood induction, not only negative — confirming the "For Better or For Worse" directionality

Continuity vs. Discreteness

"Environmental sensitivity is a continuous and normally distributed trait but people fall into three distinct sensitive groups along a sensitivity continuum." The three types are natural clusters within a continuous dimension, not categorically separate biological kinds.

Key Claims

  1. Three sensitivity groups exist in the general population — this is a data-driven finding, not just a poetic metaphor
  2. High sensitivity (Orchid) is not synonymous with pathological anxiety or neuroticism — though the groups differ on neuroticism, sensitivity predicts amplified response to both positive and negative inputs
  3. The Diathesis-Stress model (sensitivity = vulnerability) is insufficient; Differential Susceptibility (sensitivity = amplification in both directions) better fits the data
  4. Orchids show disproportionate positive emotional reactivity — this is often overlooked in clinical discussions that focus only on the "over-sensitivity to negatives" side

Pages Updated During Ingest

  • concepts/orchids-dandelions.md — population proportions corrected (Orchid 31%, Dandelion 29%, Tulip 40%); Big Five profile added; positive emotional reactivity finding noted

Open Questions

  • HSP scale sample was US undergraduates; how stable are the 31/40/29 proportions cross-culturally?
  • What is the test-retest reliability of sensitivity classification over time?
  • The bifactor model's general sensitivity factor — what does it correlate with physiologically (ARAS gain, dopamine sensitivity)?