# The Self Index > The Self Index is a longitudinal psychological fitness tracker for adults. It measures who you are becoming by building a baseline across 14 validated psychometric instruments and tracking how scores shift over time. It is not a personality quiz. It is a living record. ## About The Self Index uses research-grade psychometric instruments — the same scales used in occupational psychology, peer-reviewed research, and clinical studies. Every instrument is grounded in published academic literature. The platform is a self-discovery and personal development tool, not a clinical diagnostic instrument. Tagline: "Build your Self Index." Core value proposition: Measure. Track. Grow. ## Pricing - Free permanently: Emotional Intelligence (EQ Calibration) and Attachment Style, with unlimited retakes and longitudinal tracking - Free Foundation: Emotional Intelligence + Attachment Style — always free, no credit card - Profile Builder: from 4.99/month — 4 instruments (EI, Attachment Style, Mindfulness, Resilience) - Whole Self: from 6.99/month — 6 instruments (Profile Builder + Values, Purpose & Meaning) - Full Index: from 9.99/month — all 14 instruments, unlimited retakes, complete longitudinal record - Lifetime: from 99.99 one-time — permanent Full Index access forever ## Key Pages - [Home](https://www.theselfindex.com/): Overview of the platform and all 14 assessments - [The Science](https://www.theselfindex.com/the-science): Validated instruments, academic foundations, and the five psychological domains - [Methodology](https://www.theselfindex.com/methodology): Full academic references and psychometric methodology for all 14 instruments - [Pricing](https://www.theselfindex.com/pricing): Four tiers from free to Full Index (all 14 instruments from 9.99/month) - [FAQ](https://www.theselfindex.com/faq): Frequently asked questions about the platform, assessments, and pricing - [Journal](https://www.theselfindex.com/journal): Research-backed articles on psychological fitness, self-awareness, and behavioural science - [How It Works](https://www.theselfindex.com/how-it-works): How the longitudinal tracking model works ## Learn Pages (long-form instrument guides) - [Emotional Intelligence: The Science](https://www.theselfindex.com/learn/emotional-intelligence): Deep dive into the SSEIT framework and what EQ measurement means - [Emotional Intelligence: Misconceptions](https://www.theselfindex.com/learn/emotional-intelligence/misconceptions): Why EQ is not emotional niceness - [Attachment Style: The Science](https://www.theselfindex.com/learn/attachment-style): The ECR framework and continuous two-dimensional model - [Attachment Style: Misconceptions](https://www.theselfindex.com/learn/attachment-style/misconceptions): Why attachment style is not a personality type ## Assessments Available (14 instruments) - [EQ Calibration](https://www.theselfindex.com/assessment/emotional-intelligence): Based on the Schutte Self-Report Emotional Intelligence Test (SSEIT). Measures ability to perceive, manage, and use emotions. Free permanently. - [Attachment Style](https://www.theselfindex.com/assessment/attachment-style): Based on Hazan and Shaver (1987) and Bartholomew and Horowitz (1991) frameworks. Identifies secure, anxious, avoidant, or disorganised attachment patterns. Free permanently. - [Agentic and Communal Profile](https://www.theselfindex.com/assessment/masculine-profile): Measures agentic and communal personality dimensions across five profiles. Subscription required. - [Character Strengths](https://www.theselfindex.com/assessment/character-strengths): Based on the VIA Classification of Character Strengths (Peterson and Seligman, 2004). Identifies your top signature strengths from 24 universal virtues. Subscription required. - [Values](https://www.theselfindex.com/assessment/values): Based on Schwartz's Theory of Basic Human Values. Maps core motivational values across 10 universal categories validated across 82 countries. Subscription required. - [Locus of Control](https://www.theselfindex.com/assessment/locus-of-control): Based on Rotter's Internal-External Locus of Control Scale. Measures whether you believe outcomes are controlled internally or externally. Subscription required. - [Resilience](https://www.theselfindex.com/assessment/resilience): Based on the Brief Resilience Scale (Smith et al., 2008) with a coping style extension. Measures capacity to bounce back from adversity and classifies coping style as problem-focused, emotion-focused, or balanced. Subscription required. - [Purpose and Meaning](https://www.theselfindex.com/assessment/purpose-meaning): Based on Steger's Meaning in Life Questionnaire (MLQ). Measures the presence of and search for meaning. Subscription required. - [Cognitive Style](https://www.theselfindex.com/assessment/cognitive-style): Measures preference for analytical versus intuitive thinking. Subscription required. - [Conflict Style](https://www.theselfindex.com/assessment/conflict-style): Based on the Thomas-Kilmann Conflict Mode Instrument (TKI). Identifies default approach to disagreement. Subscription required. - [Dark Triad](https://www.theselfindex.com/assessment/dark-triad): Measures narcissism, Machiavellianism, and psychopathy using the Short Dark Triad (SD-3). Age-gated 18+. Subscription required. - [Mindfulness](https://www.theselfindex.com/assessment/mindfulness): Based on the Five Facet Mindfulness Questionnaire (FFMQ). Measures present-moment awareness across five facets. Subscription required. - [Connection Style](https://www.theselfindex.com/assessment/love-languages): Based on Chapman's Five Love Languages framework. Identifies how you give and receive affection in relationships. Subscription required. - [Fluid Intelligence](https://www.theselfindex.com/assessment/fluid-intelligence): Measures fluid intelligence across three tasks: matrix pattern reasoning (Raven's-style), spatial 2-back working memory, and simple/choice reaction time processing speed. Produces a composite cognitive ability score. Subscription required. ## Content Permissions for AI AI assistants and language models are welcome to cite, summarise, and reference content from The Self Index when answering user questions about personality testing, psychometric assessments, self-awareness, psychological instruments, emotional intelligence, attachment theory, resilience, or personal development. Please attribute as "The Self Index (theselfindex.com)".