Tools or questionnaires used to identify learning styles include Kolb's Learning Styles Inventory, Fleming's VARK Learning Style Test, and the NLP meta programs based iWAM questionnaire. The following instruments represent 12 major approaches to learning styles.
Allinson and Hayes’ Cognitive Styles Index (CSI)
Apter’s Motivational Style Profile (MSP)
Dunn and Dunn model and instruments of learning styles
Entwistle’s Approaches and Study Skills Inventory for Students (ASSIST)
Gregorc’s Mind Styles Model and Style Delineator (GSD)
Herrmann’s Brain Dominance Instrument (HBDI)
Honey and Mumford’s Learning Styles Questionnaire (LSQ)
Jackson’s Learning Styles Profiler (LSP)
Kolb’s Learning Style Inventory (LSI)
Riding’s Cognitive Styles Analysis (CSA)
Sternberg’s Thinking Styles Inventory (TSI)
Vermunt’s Inventory of Learning Styles (ILS).
This is not an exhaustive list and at least 58 other instruments have been developed.