Theorists

Charles Spearman – 1863 1945

A comprehensive academic examination of Charles Spearman (1863–1945), pioneer of psychometrics, developer of factor analysis,...

October 7, 2026 • Dr. Mohammed Looti
Scales

Aspects of Identity Questionnaire (AIQ-IV)

The Aspects of Identity Questionnaire (AIQ-IV) is an established 45-item psychometric instrument assessing personal, relational,...

October 1, 2026 • Dr. Mohammed Looti
Scales

The Satisfaction with Life Scale (SWL)

A comprehensive psychometric guide to the Satisfaction with Life Scale (SWLS), developed by Ed Diener...

October 1, 2026 • Dr. Mohammed Looti
Scales

Value Profile

The Value Profile, developed by Robert F. Bales and Arthur S. Couch (1969), is a...

September 30, 2026 • Dr. Mohammed Looti
Scales

Cross-Cultural Dimensions of Religiosity

A comprehensive psychometric guide to the Cross-Cultural Dimensions of Religiosity Scale (CCDRS) developed by Gordon...

September 30, 2026 • Dr. Mohammed Looti
Scales

Stages of Concern Questionnaire

A comprehensive psychometric guide to the Stages of Concern Questionnaire (SoCQ), a 35-item CBAM instrument...

September 28, 2026 • Dr. Mohammed Looti
Scales

Zones of Indifference Instrument

The Zones of Indifference Instrument (ZII), developed by Wilkes and Blackbourn in 1981, is an...

September 28, 2026 • Dr. Mohammed Looti
Scales

About Your Company – 1960 scale

A comprehensive psychometric guide to the About Your Company (AYC) scale developed by Donald C....

September 28, 2026 • Dr. Mohammed Looti
Scales

Five-Part Personality Inventory

The Five-Part Personality Inventory (FPPI), authored by Sybil B. G. Eysenck in 1960, is a...

September 28, 2026 • Dr. Mohammed Looti
Scales

Parent Rating Schedule

An in-depth academic examination of the Parent Rating Schedule (Becker, 1960), a comprehensive 73-item bipolar...

September 28, 2026 • Dr. Mohammed Looti